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authorPaweł Redman <trem.redman@gmail.com>2013-09-06 22:40:51 +0200
committerPaweł Redman <trem.redman@gmail.com>2013-09-06 22:40:51 +0200
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+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">
+<html>
+
+<head>
+<link HREF="mailto:drh@microsoft.com" REV="made" TITLE="David R. Hanson">
+<title>The lcc 4.1 Code-Generation Interface</title>
+</head>
+
+<body>
+
+<h1>The lcc 4.1 Code-Generation Interface</h1>
+
+<p ALIGN="LEFT"><strong><a HREF="http://www.research.microsoft.com/~cwfraser/">Christopher
+W. Fraser</a> and <a HREF="http://www.research.microsoft.com/~drh/">David R. Hanson</a>, <a
+HREF="http://www.research.microsoft.com/">Microsoft Research</a></strong></p>
+
+<h2>Contents</h2>
+
+<dir>
+ <li><a HREF="#intro">Introduction</a> </li>
+ <li><a HREF="#metrics">5.1 Type Metrics</a></li>
+ <li><a HREF="#symbols">5.3 Symbols</a> </li>
+ <li><a HREF="#operators">5.5 Dag Operators</a></li>
+ <li><a HREF="#flags">5.6 Interface Flags</a></li>
+ <li><a HREF="#definitions">5.8 Definitions</a></li>
+ <li><a HREF="#constants">5.9 Constants</a></li>
+ <li><a HREF="#upcalls">5.12 Upcalls</a></li>
+</dir>
+
+<h2><a NAME="intro">Introduction</a></h2>
+
+<p>Version 4.1 is the latest release of <a
+HREF="http://www.cs.princeton.edu/software/lcc/">lcc</a>, the ANSI C compiler described in
+our book <cite>A Retargetable C Compiler: Design and Implementation</cite>
+(Addison-Wesley, 1995, ISBN 0-8053-1670-1). This document summarizes the differences
+between the 4.1 code-generation interface and the 3.x interface described in Chap. 5 of <cite>A
+Retargetable C Compiler</cite>.</p>
+
+<p>Previous versions of lcc supported only three sizes of integers, two sizes of floats,
+and insisted that pointers fit in unsigned integers (see Sec. 5.1 of <cite>A Retargetable
+C Compiler</cite>). These assumptions simplified the compiler, and were suitable for
+32-bit architectures. But on 64-bit architectures, such as the DEC ALPHA, it's natural to
+have four sizes of integers and perhaps three sizes of floats, and on 16-bit
+architectures, 32-bit pointers don't fit in unsigned integers. Also, the 3.x constaints
+limited the use of lcc's back ends for other languages, such as Java.</p>
+
+<p>Version 4.x removes all of these restrictions: It supports any number of sizes for
+integers and floats, and the size of pointers need not be related to the size of any of
+the integer types. The major changes in the code-generation interface are:
+
+<ul>
+ <li>The number of type suffixes has been reduced to 6.</li>
+ <li>Dag operators are composed of a generic operator, a type suffix, and a size.</li>
+ <li>Unsigned variants of several operators have been added.</li>
+ <li>Several interface functions have new signatures.</li>
+</ul>
+
+<p>In addition, version 4.x is written in ANSI C and uses the standard I/O library and
+other standard C functions.</p>
+
+<p>The sections below parallel the subsections of Chap. 5 of <cite>A Retargetable C
+Compiler</cite> and summarize the differences between the 3.x and 4.x code-generation
+interface. Unaffected subsections are omitted. Page citations refer to pages in <cite>A
+Retargetable C Compiler</cite>.</p>
+
+<h2><a NAME="metrics">5.1 Type Metrics</a></h2>
+
+<p>There are now 10 metrics in an interface record:</p>
+
+<pre>Metrics charmetric;
+Metrics shortmetric;
+Metrics intmetric;
+Metrics longmetric;
+Metrics longlongmetric;
+Metrics floatmetric;
+Metrics doublemetric;
+Metrics longdoublemetric;
+Metrics ptrmetric;
+Metrics structmetric;</pre>
+
+<p>Each of these specifies the size and alignment of the corresponding type. <code>ptrmetric</code>
+describes all pointers.</p>
+
+<h2><a NAME="symbols">5.3 Symbols</a></h2>
+
+<p>The actual value of a constant is stored in the <code>u.c.v</code> field of a symbol,
+which holds a <code>Value</code>:</p>
+
+<pre>typedef union value {
+ long i;
+ unsigned long u;
+ long double d;
+ void *p;
+ void (*g)(void);
+} Value;</pre>
+
+<p>The value is stored in the appropriate field according to its type, which is given by
+the symbol's <code>type</code> field.</p>
+
+<h2><a NAME="operators">5.5 Dag Operators</a></h2>
+
+<p>The <code>op</code> field a of <code>node</code> structure holds a dag operator, which
+consists of a generic operator, a type suffix, and a size indicator. The type suffixes
+are:</p>
+
+<pre>enum {
+ F=FLOAT,
+ I=INT,
+ U=UNSIGNED,
+ P=POINTER,
+ V=VOID,
+ B=STRUCT
+};
+
+#define sizeop(n) ((n)&lt;&lt;10)</pre>
+
+<p>Given a generic operator <code>o</code>, a type suffix <code>t</code>, and a size <code>s</code>,
+a type- and size-specific operator is formed by <code>o+t+sizeop(s)</code>. For example, <code>ADD+F+sizeop(4)</code>
+forms the operator <code>ADDF4</code>, which denotes the sum of two 4-byte floats.
+Similarly, <code>ADD+F+sizeop(8)</code> forms <code>ADDF8</code>, which denotes 8-byte
+floating addition. In the 3.x code-generation interface, <code>ADDF</code> and <code>ADDD</code>
+denoted these operations. There was no size indicator in the 3.x operators because the
+type suffix supplied both a type and a size.</p>
+
+<p>Table 5.1 lists each generic operator, its valid type suffixes, and the number of <code>kids</code>
+and <code>syms</code> that it uses; multiple values for <code>kids</code> indicate
+type-specific variants. The notations in the <strong>syms</strong> column give the number
+of <code>syms</code> values and a one-letter code that suggests their uses: 1V indicates
+that <code>syms[0]</code> points to a symbol for a variable, 1C indicates that <code>syms[0]</code>
+is a constant, and 1L indicates that <code>syms[0]</code> is a label. For 1S, <code>syms[0]</code>
+is a constant whose value is a size in bytes; 2S adds <code>syms[1]</code>, which is a
+constant whose value is an alignment. For most operators, the type suffix and size
+indicator denote the type and size of operation to perform and the type and size of the
+result.</p>
+
+<table WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0">
+ <tr>
+ <td COLSPAN="6" ALIGN="CENTER"><strong>Table 5.1<img SRC="/~drh/resources/dot_clear.gif"
+ ALT="|" WIDTH="18" HEIGHT="1">Node Operators.</strong></td>
+ </tr>
+ <tr>
+ <td><strong>syms</strong></td>
+ <td><strong>kids</strong></td>
+ <td><strong>Operator</strong></td>
+ <td><strong>Type Suffixes</strong></td>
+ <td><strong>Sizes</strong></td>
+ <td><strong>Operation</strong></td>
+ </tr>
+ <tr>
+ <td>1V</td>
+ <td>0</td>
+ <td><code>ADDRF</code></td>
+ <td><code>...P..</code></td>
+ <td>p</td>
+ <td>address of a parameter</td>
+ </tr>
+ <tr>
+ <td>1V</td>
+ <td>0</td>
+ <td><code>ADDRG</code></td>
+ <td><code>...P..</code></td>
+ <td>p</td>
+ <td>address of a global</td>
+ </tr>
+ <tr>
+ <td>1V</td>
+ <td>0</td>
+ <td><code>ADDRL</code></td>
+ <td><code>...P..</code></td>
+ <td>p</td>
+ <td>address of a local</td>
+ </tr>
+ <tr>
+ <td>1C</td>
+ <td>0</td>
+ <td><code>CNST</code></td>
+ <td><code>FIUP..</code></td>
+ <td>fdx csilh p</td>
+ <td>constant</td>
+ </tr>
+ <tr ALIGN="LEFT" VALIGN="TOP">
+ <td><img SRC="/~drh/resources/dot_clear.gif" ALT="|" WIDTH="1" HEIGHT="12"></td>
+ <td></td>
+ <td></td>
+ <td></td>
+ <td></td>
+ <td></td>
+ </tr>
+ <tr>
+ <td></td>
+ <td>1</td>
+ <td><code>BCOM</code></td>
+ <td><code>.IU...</code></td>
+ <td>ilh</td>
+ <td>bitwise complement</td>
+ </tr>
+ <tr>
+ <td>1S</td>
+ <td>1</td>
+ <td><code>CVF</code></td>
+ <td><code>FI....</code></td>
+ <td>fdx ilh</td>
+ <td>convert from float</td>
+ </tr>
+ <tr>
+ <td>1S</td>
+ <td>1</td>
+ <td><code>CVI</code></td>
+ <td><code>FIU...</code></td>
+ <td>fdx csilh csilhp</td>
+ <td>convert from signed integer</td>
+ </tr>
+ <tr>
+ <td>1S</td>
+ <td>1</td>
+ <td><code>CVP</code></td>
+ <td><code>..U..</code></td>
+ <td>p</td>
+ <td>convert from pointer</td>
+ </tr>
+ <tr>
+ <td>1S</td>
+ <td>1</td>
+ <td><code>CVU</code></td>
+ <td><code>.IUP..</code></td>
+ <td>csilh p</td>
+ <td>convert from unsigned integer</td>
+ </tr>
+ <tr>
+ <td></td>
+ <td>1</td>
+ <td><code>INDIR</code></td>
+ <td><code>FIUP.B</code></td>
+ <td>fdx csilh p</td>
+ <td>fetch</td>
+ </tr>
+ <tr>
+ <td></td>
+ <td>1</td>
+ <td><code>NEG</code></td>
+ <td><code>FI....</code></td>
+ <td>fdx ilh</td>
+ <td>negation</td>
+ </tr>
+ <tr>
+ <td><img SRC="/~drh/resources/dot_clear.gif" ALT="|" WIDTH="1" HEIGHT="12"></td>
+ <td></td>
+ <td></td>
+ <td></td>
+ <td></td>
+ <td></td>
+ </tr>
+ <tr>
+ <td></td>
+ <td>2</td>
+ <td><code>ADD</code></td>
+ <td><code>FIUP..</code></td>
+ <td>fdx ilh ilhp p</td>
+ <td>addition</td>
+ </tr>
+ <tr>
+ <td></td>
+ <td>2</td>
+ <td><code>BAND</code></td>
+ <td><code>.IU...</code></td>
+ <td>ilh</td>
+ <td>bitwise AND</td>
+ </tr>
+ <tr>
+ <td></td>
+ <td>2</td>
+ <td><code>BOR</code></td>
+ <td><code>.IU...</code></td>
+ <td>ilh</td>
+ <td>bitwise inclusive OR</td>
+ </tr>
+ <tr>
+ <td></td>
+ <td>2</td>
+ <td><code>BXOR</code></td>
+ <td><code>.IU...</code></td>
+ <td>ilh</td>
+ <td>bitwise exclusive OR</td>
+ </tr>
+ <tr>
+ <td></td>
+ <td>2</td>
+ <td><code>DIV</code></td>
+ <td><code>FIU...</code></td>
+ <td>fdx ilh</td>
+ <td>division</td>
+ </tr>
+ <tr>
+ <td></td>
+ <td>2</td>
+ <td><code>LSH</code></td>
+ <td><code>.IU...</code></td>
+ <td>ilh</td>
+ <td>left shift</td>
+ </tr>
+ <tr>
+ <td></td>
+ <td>2</td>
+ <td><code>MOD</code></td>
+ <td><code>.IU...</code></td>
+ <td>ilh</td>
+ <td>modulus</td>
+ </tr>
+ <tr>
+ <td></td>
+ <td>2</td>
+ <td><code>MUL</code></td>
+ <td><code>FIU...</code></td>
+ <td>fdx ilh</td>
+ <td>multiplication</td>
+ </tr>
+ <tr>
+ <td></td>
+ <td>2</td>
+ <td><code>RSH</code></td>
+ <td><code>.IU...</code></td>
+ <td>ilh</td>
+ <td>right shift</td>
+ </tr>
+ <tr>
+ <td></td>
+ <td>2</td>
+ <td><code>SUB</code></td>
+ <td><code>FIUP..</code></td>
+ <td>fdx ilh ilhp p</td>
+ <td>subtraction</td>
+ </tr>
+ <tr>
+ <td><img SRC="/~drh/resources/dot_clear.gif" ALT="|" WIDTH="1" HEIGHT="12"></td>
+ <td></td>
+ <td></td>
+ <td></td>
+ <td></td>
+ <td></td>
+ </tr>
+ <tr>
+ <td>2S</td>
+ <td>2</td>
+ <td><code>ASGN</code></td>
+ <td><code>FIUP.B</code></td>
+ <td>fdx csilh p</td>
+ <td>assignment</td>
+ </tr>
+ <tr>
+ <td>1L</td>
+ <td>2</td>
+ <td><code>EQ</code></td>
+ <td><code>FIU...</code></td>
+ <td>fdx ilh ilhp</td>
+ <td>jump if equal</td>
+ </tr>
+ <tr>
+ <td>1L</td>
+ <td>2</td>
+ <td><code>GE</code></td>
+ <td><code>FIU...</code></td>
+ <td>fdx ilh ilhp</td>
+ <td>jump if greater than or equal</td>
+ </tr>
+ <tr>
+ <td>1L</td>
+ <td>2</td>
+ <td><code>GT</code></td>
+ <td><code>FIU...</code></td>
+ <td>fdx ilh ilhp</td>
+ <td>jump if greater than</td>
+ </tr>
+ <tr>
+ <td>1L</td>
+ <td>2</td>
+ <td><code>LE</code></td>
+ <td><code>FIU...</code></td>
+ <td>fdx ilh ilhp</td>
+ <td>jump if less than or equal</td>
+ </tr>
+ <tr>
+ <td>1L</td>
+ <td>2</td>
+ <td><code>LT</code></td>
+ <td><code>FIU...</code></td>
+ <td>fdx ilh ilhp</td>
+ <td>jump if less than</td>
+ </tr>
+ <tr>
+ <td>1L</td>
+ <td>2</td>
+ <td><code>NE</code></td>
+ <td><code>FIU...</code></td>
+ <td>fdx ilh ilhp</td>
+ <td>jump if not equal</td>
+ </tr>
+ <tr>
+ <td></td>
+ <td></td>
+ <td></td>
+ <td></td>
+ <td></td>
+ <td></td>
+ </tr>
+ <tr>
+ <td>2S</td>
+ <td>1</td>
+ <td><code>ARG</code></td>
+ <td><code>FIUP.B</code></td>
+ <td>fdx ilh p</td>
+ <td>argument</td>
+ </tr>
+ <tr>
+ <td>1</td>
+ <td>1 or 2</td>
+ <td><code>CALL</code></td>
+ <td><code>FIUPVB</code></td>
+ <td>fdx ilh p</td>
+ <td>function call</td>
+ </tr>
+ <tr>
+ <td></td>
+ <td>1</td>
+ <td><code>RET</code></td>
+ <td><code>FIUPV.</code></td>
+ <td>fdx ilh p</td>
+ <td>return from function</td>
+ </tr>
+ <tr>
+ <td><img SRC="/~drh/resources/dot_clear.gif" ALT="|" WIDTH="1" HEIGHT="12"></td>
+ <td></td>
+ <td></td>
+ <td></td>
+ <td></td>
+ <td></td>
+ </tr>
+ <tr>
+ <td></td>
+ <td>1</td>
+ <td><code>JUMP</code></td>
+ <td><code>....V.</code></td>
+ <td></td>
+ <td>unconditional jump</td>
+ </tr>
+ <tr>
+ <td>1L</td>
+ <td>0</td>
+ <td><code>LABEL</code></td>
+ <td><code>....V.</code></td>
+ <td></td>
+ <td>label definition</td>
+ </tr>
+</table>
+
+<p>The entries in the <strong>Sizes</strong> column indicate sizes of the operators that
+back ends must implement. Letters denote the size of float (f), double (d), long double
+(x), character (c), short integer (s), integer (i), long integer (l), &quot;long
+long&quot; integer (h) , and pointer (p). These sizes are separated into sets for each
+type suffix, except that a single set is used for both I and U when the set for I is
+identical to the set for U.</p>
+
+<p>The actual values for the size indicators, fdxcsilhp, depend on the target. A
+specification like <code>ADDF</code>f denotes the operator <code>ADD+F+sizeop(</code>f<code>)</code>,
+where &quot;f&quot; is replaced by a target-dependent value, e.g., <code>ADDF4</code> and <code>ADDF8</code>.
+For example, back ends must implement the following <code>CVI</code> and <code>MUL</code>
+operators.</p>
+
+<blockquote>
+ <p><code>CVIF</code>f <code>CVIF</code>d <code>CVIF</code>x<br>
+ <code>CVII</code>c <code>CVII</code>s <code>CVII</code>i <code>CVII</code>l <code>CVII</code>h<br>
+ <code>CVIU</code>c <code>CVIU</code>s <code>CVIU</code>i <code>CVIU</code>l <code>CVIU</code>h
+ <code>CVIU</code>p<br>
+ <br>
+ <code>MULF</code>f <code>MULF</code>d <code>MULF</code>x<br>
+ <code>MULI</code>i <code>MULI</code>l <code>MULI</code>h<br>
+ <code>MULU</code>i <code>MULU</code>l <code>MULU</code>h</p>
+</blockquote>
+
+<p>On most platforms, there are fewer than three sizes of floats and six sizes of
+integers, and pointers are usually the same size as one of the integers. And lcc doesn't
+support the &quot;long long&quot; type, so h is not currently used. So the set of
+platform-specific operators is usually smaller than the list above suggests. For example,
+the X86, SPARC, and MIPS back ends implement the following <code>CVI</code> and <code>MUL</code>
+operators.</p>
+
+<blockquote>
+ <p><code>CVIF</code>4 <code>CVIF</code>8<br>
+ <code>CVII</code>1 <code>CVII</code>2 <code>CVII</code>4<br>
+ <code>CVIU</code>1 <code>CVIU</code>2 <code>CVIU</code>4 <br>
+ <br>
+ <code>MULF</code>4 <code>MULF</code>8<br>
+ <code>MULI</code>4<br>
+ <code>MULU</code>4</p>
+</blockquote>
+
+<p>The set of operators is thus target-dependent; for example, <code>ADDI8</code> appears
+only if the target supports an 8-byte integer type. <a
+HREF="ftp://ftp.cs.princeton.edu/pub/packages/lcc/contrib/ops.c"><code>ops.c</code></a> is
+a program that, given a set of sizes, prints the required operators and their values,
+e.g.,</p>
+
+<blockquote>
+ <pre>% <em>ops c=1 s=2 i=4 l=4 h=4 f=4 d=8 x=8 p=4</em>
+...
+ CVIF4=4225 CVIF8=8321
+ CVII1=1157 CVII2=2181 CVII4=4229
+ CVIU1=1158 CVIU2=2182 CVIU4=4230
+...
+ MULF4=4561 MULF8=8657
+ MULI4=4565
+ MULU4=4566
+...
+131 operators</pre>
+</blockquote>
+
+<p>The type suffix for a conversion operator denotes the type of the result and the size
+indicator gives the size of the result. For example, <code>CVUI4</code> converts an
+unsigned (<code>U</code>) to a 4-byte signed integer (<code>I4</code>). The <code>syms[0]</code>
+field points to a symbol-table entry for a integer constant that gives the size of the
+source operand. For example, if <code>syms[0]</code> in a <code>CVUI4</code> points to a
+symbol-table entry for 2, the conversion widens a 2-byte unsigned integer to a 4-byte
+signed integer. Conversions that widen unsigned integers zero-extend; those that widen
+signed integers sign-extend.</p>
+
+<p>The front end composes conversions between types <em>T</em><sub>1</sub> and <em>T</em><sub>2</sub>
+by widening <em>T</em><sub>1</sub> to its &quot;supertype&quot;, if necessary, converting
+that result to <em>T</em><sub>2</sub>'s supertype, then narrowing the result to <em>T</em><sub>2</sub>,
+if necessary. The following table lists the supertypes; omitted entries are their own
+supertypes.</p>
+
+<blockquote>
+ <table BORDER="0" CELLPADDING="0" CELLSPACING="0">
+ <tr>
+ <td><strong>Type</strong></td>
+ <td><img SRC="/~drh/resources/dot_clear.gif" ALT="|" WIDTH="24" HEIGHT="1"></td>
+ <td><strong>Supertype</strong></td>
+ </tr>
+ <tr>
+ <td>signed char</td>
+ <td></td>
+ <td>int</td>
+ </tr>
+ <tr>
+ <td>signed short</td>
+ <td></td>
+ <td>int</td>
+ </tr>
+ <tr ALIGN="LEFT" VALIGN="TOP">
+ <td>unsigned char</td>
+ <td></td>
+ <td>int, if sizeof (char) &lt; sizeof (int)<br>
+ unsigned, otherwise</td>
+ </tr>
+ <tr ALIGN="LEFT" VALIGN="TOP">
+ <td>unsigned short</td>
+ <td></td>
+ <td>int, if sizeof (short) &lt; sizeof (int)<br>
+ unsigned, otherwise</td>
+ </tr>
+ <tr ALIGN="LEFT" VALIGN="TOP">
+ <td>void *</td>
+ <td></td>
+ <td>an unsigned type as large as a pointer</td>
+ </tr>
+ </table>
+</blockquote>
+
+<p>Pointers are converted to an unsigned type of the same size, even when that type is not
+one of the integer types.</p>
+
+<p>For example, the front end converts a signed short to a float by first converting it to
+an int and then to a float. It converts an unsigned short to an int with a single <code>CVUI</code>i
+conversion, when shorts are smaller than ints.</p>
+
+<p>There are now signed and unsigned variants of <code>ASGN</code>, <code>INDIR</code>, <code>BCOM</code>,
+<code>BOR</code>, <code>BXOR</code>, <code>BAND</code>, <code>ARG</code>, <code>CALL</code>,
+and <code>RET</code> to simplify code generation on platforms that use different
+instructions or register set for signed and unsigned operations. Likewise there are now
+pointer variants of <code>ASGN</code>, <code>INDIR</code>, <code>ARG</code>, <code>CALL</code>,
+and <code>RET</code>.</p>
+
+<h2><a NAME="flags">5.6 Interface Flags</a></h2>
+
+<pre>unsigned unsigned_char:1;</pre>
+
+<p>tells the front end whether plain characters are signed or unsigned. If it's zero, char
+is a signed type; otherwise, char is an unsigned type.</p>
+
+<p>All the interface flags can be set by command-line options, e.g., <code>-Wf-unsigned_char=1</code>
+causes plain characters to be unsigned.</p>
+
+<h2><a NAME="definitions">5.8 Definitions</a></h2>
+
+<p>The front end announces local variables by calling</p>
+
+<pre>void (*local)(Symbol);</pre>
+
+<p>It announces temporaries likewise; these have the symbol's <code>temporary</code> flag
+set, which indicates that the symbol will be used only in the next call to <code>gen</code>.
+If a temporary's <code>u.t.cse</code> field is nonnull, it points to the node that
+computes the value assigned to the temporary; see page 346.</p>
+
+<p>The front end calls</p>
+
+<pre>void (*address)(Symbol p, Symbol q, long n);</pre>
+
+<p>to initialize <code>q</code> to a symbol that represents an address of the form <em>x</em>+<code>n</code>,
+where <em>x</em> is the address represented by <code>p</code> and the long integer <code>n</code>
+is positive or negative.</p>
+
+<h2><a NAME="constants">5.9 Constants</a></h2>
+
+<p>The interface function</p>
+
+<pre>void (*defconst)(int suffix, int size, Value v);</pre>
+
+<p>initializes constants. defconst emits directives to define a cell and initialize it to
+a constant value. v is the constant value, suffix identifies the type of the value, and
+size is the size of the value in bytes. The value of suffix indicates which field of v
+holds the value, as shown in the following table.</p>
+
+<blockquote>
+ <table BORDER="0" CELLPADDING="1" CELLSPACING="1">
+ <tr>
+ <td><strong>suffix</strong></td>
+ <td><img SRC="/~drh/resources/dot_clear.gif" ALT="|" WIDTH="24" HEIGHT="1"></td>
+ <td><strong>v Field</strong></td>
+ <td><img SRC="/~drh/resources/dot_clear.gif" ALT="|" WIDTH="24" HEIGHT="1"></td>
+ <td><strong>size</strong></td>
+ </tr>
+ <tr>
+ <td><code>F</code></td>
+ <td></td>
+ <td><code>v.d</code></td>
+ <td></td>
+ <td>float, double, long double</td>
+ </tr>
+ <tr>
+ <td><code>I</code></td>
+ <td></td>
+ <td><code>v.i</code></td>
+ <td></td>
+ <td>signed char, signed short, signed int, signed long</td>
+ </tr>
+ <tr>
+ <td><code>U</code></td>
+ <td></td>
+ <td><code>v.u</code></td>
+ <td></td>
+ <td>unsigned char, unsigned short, unsigned int, unsigned long</td>
+ </tr>
+ <tr>
+ <td><code>P</code></td>
+ <td></td>
+ <td><code>v.p</code></td>
+ <td></td>
+ <td>void *</td>
+ </tr>
+ </table>
+</blockquote>
+
+<p><code>defconst</code> must narrow <code>v.</code>x when <code>size</code> is less than <code>sizeof</code>
+<code>v.</code>x; e.g., to emit an unsigned char, <code>defconst</code> should emit <code>(unsigned
+char)v.i</code>.</p>
+
+<h2><a NAME="upcalls">5.12 Upcalls</a></h2>
+
+<p>lcc 4.x uses standard I/O and its I/O functions have been changed accordingly. lcc
+reads input from the standard input, emits code to the standard output, and writes
+diagnostics to the standard error output. It uses <code>freopen</code> to redirect these
+streams to explicit files, when necessary.</p>
+
+<p><code>bp</code>, <code>outflush</code>, and <code>outs</code> have been eliminated.</p>
+
+<pre>extern void fprint(FILE *f, const char *fmt, ...);
+extern void print(const char *fmt, ...);</pre>
+
+<p>print formatted data to file <code>f</code> (<code>fprint</code>) or the standard
+output (<code>print</code>). These functions are like standard C's <code>printf</code> and
+<code>fprintf</code>, but support only some of the standard conversion specifiers and do
+not support flags, precision, and field-width specifications. They support the following
+new conversion specifiers in addition to those described on page 99.</p>
+
+<blockquote>
+ <table BORDER="0" CELLPADDING="0" CELLSPACING="0">
+ <tr>
+ <td><strong>Specifiers</strong></td>
+ <td><img SRC="/~drh/resources/dot_clear.gif" ALT="|" WIDTH="24" HEIGHT="1"></td>
+ <td><strong>Corresponding printf Specifiers</strong></td>
+ </tr>
+ <tr>
+ <td><code>%c</code></td>
+ <td></td>
+ <td><code>%c</code></td>
+ </tr>
+ <tr>
+ <td><code>%d %D</code></td>
+ <td></td>
+ <td><code>%d %ld</code></td>
+ </tr>
+ <tr>
+ <td><code>%u %U</code></td>
+ <td></td>
+ <td><code>%u %lu</code></td>
+ </tr>
+ <tr>
+ <td><code>%x %X</code></td>
+ <td></td>
+ <td><code>%x %lx</code></td>
+ </tr>
+ <tr>
+ <td><code>%f %e %g</code></td>
+ <td></td>
+ <td><code>%e %f %g</code></td>
+ </tr>
+ <tr ALIGN="LEFT" VALIGN="TOP">
+ <td><code>%p</code></td>
+ <td></td>
+ <td>Converts the corresponding void * argument to unsigned long and prints it with the <code>printf</code>
+ <code>%#x</code> specifier or just <code>%x</code> when the argument is null.</td>
+ </tr>
+ <tr ALIGN="LEFT" VALIGN="TOP">
+ <td><code>%I</code></td>
+ <td></td>
+ <td>Prints the number of spaces given by the corresponding argument.</td>
+ </tr>
+ </table>
+</blockquote>
+
+<pre>#define generic(op) ((op)&amp;0x3F0)
+#define specific(op) ((op)&amp;0x3FF)</pre>
+
+<p><code>generic(op)</code> returns the generic variant of <code>op</code>; that is,
+without its type suffix and size indicator. <code>specific(op)</code> returns the
+type-specific variant of <code>op</code>; that is, without its size indicator.</p>
+
+<p><code>newconst</code> has been replaced by</p>
+
+<pre>extern Symbol intconst(int n);</pre>
+
+<p>which installs the integer constant <code>n</code> in the symbol table, if necessary,
+and returns a pointer to the symbol-table entry.</p>
+
+<hr>
+
+<address>
+ <a HREF="http://www.research.microsoft.com/~cwfraser/">Chris Fraser</a> / <a
+ HREF="mailto:cwfraser@microsoft.com">cwfraser@microsoft.com</a><br>
+ <a HREF="http://www.research.microsoft.com/~drh/">David Hanson</a> / <a
+ HREF="mailto:drh@microsoft.com">drh@microsoft.com</a><br>
+ $Revision: 145 $ $Date: 2001-10-17 16:53:10 -0500 (Wed, 17 Oct 2001) $
+</address>
+</body>
+</html>
diff --git a/src/tools/lcc/doc/bprint.1 b/src/tools/lcc/doc/bprint.1
new file mode 100644
index 0000000..8cf9971
--- /dev/null
+++ b/src/tools/lcc/doc/bprint.1
@@ -0,0 +1,83 @@
+.\" $Id: bprint.1 145 2001-10-17 21:53:10Z timo $
+.TH BPRINT 1 "local \- $Date: 2001-10-17 16:53:10 -0500 (Wed, 17 Oct 2001) $"
+.SH NAME
+bprint \- expression profiler
+.SH SYNOPSIS
+.B bprint
+[
+.I option ...
+]
+[
+.I file ...
+]
+.SH DESCRIPTION
+.I bprint
+produces on the standard output a listing of the programs compiled by
+.I lcc
+with the
+.B \-b
+option.
+Executing an
+.B a.out
+so compiled appends profiling data to
+.BR prof.out .
+The first token of each expression in the listing is preceded
+by the number of times it was executed
+enclosed in angle brackets as determined from the data in
+.BR prof.out .
+.I bprint
+interprets the following options.
+.TP
+.B \-c
+Compress the
+.B prof.out
+file, which otherwise grows with every execution of
+.BR a.out .
+.TP
+.B \-b
+Print an annotated listing as described above.
+.TP
+.B \-n
+Include line numbers in the listing.
+.TP
+.B \-f
+Print only the number of invocations of each function.
+A second
+.B \-f
+summarizes call sites instead of callers.
+.TP
+.BI \-I \*Sdir
+specifies additional directories in which to seek
+files given in
+.B prof.out
+that do not begin with `/'.
+.PP
+If any file names are given, only the requested data for those files are printed
+in the order presented.
+If no options are given,
+.B \-b
+is assumed.
+.SH FILES
+.PP
+.ta \w'$LCCDIR/liblcc.{a,lib}XX'u
+.nf
+prof.out profiling data
+$LCCDIR/liblcc.{a,lib} \fIlcc\fP-specific library
+.SH "SEE ALSO"
+.IR lcc (1),
+.IR prof (1)
+.SH BUGS
+Macros and comments can confuse
+.I bprint
+because it uses post-expansion source coordinates
+to annotate pre-expansion source files.
+If
+.I bprint
+sees that it's about to print a statement count
+.I inside
+a number or identifier, it moves the count to just
+.I before
+the token.
+.PP
+Can't cope with an ill-formed
+.BR prof.out .
diff --git a/src/tools/lcc/doc/bprint.pdf b/src/tools/lcc/doc/bprint.pdf
new file mode 100644
index 0000000..1b11963
--- /dev/null
+++ b/src/tools/lcc/doc/bprint.pdf
Binary files differ
diff --git a/src/tools/lcc/doc/install.html b/src/tools/lcc/doc/install.html
new file mode 100644
index 0000000..3cc59a8
--- /dev/null
+++ b/src/tools/lcc/doc/install.html
@@ -0,0 +1,796 @@
+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">
+<html>
+
+<head>
+<link HREF="mailto:drh@cs.princeton.edu" REV="made" TITLE="David R. Hanson">
+<title>Installing lcc</title>
+</head>
+
+<body>
+
+<h1>Installing lcc</h1>
+
+<p ALIGN="LEFT"><strong><a HREF="http://www.research.microsoft.com/~cwfraser/">Christopher
+W. Fraser</a> and <a HREF="http://www.research.microsoft.com/~drh/">David R. Hanson</a>, <a
+HREF="http://www.research.microsoft.com/">Microsoft Research</a></strong></p>
+
+<h2>Contents</h2>
+
+<dir>
+ <li><a HREF="#intro">Introduction</a></li>
+ <li><a HREF="#unix">Installation on UNIX</a></li>
+ <li><a HREF="#driver">Building the Driver</a></li>
+ <li><a HREF="#rcc">Building the Compiler and Accessories</a></li>
+ <li><a HREF="#win32">Installation on Windows NT 4.0 and Windows 95/98</a></li>
+ <li><a HREF="#bugs">Reporting Bugs</a></li>
+ <li><a HREF="#mailinglist">Keeping in Touch</a></li>
+</dir>
+
+<h2><a NAME="intro">Introduction</a></h2>
+
+<p><a HREF="http://www.cs.princeton.edu/software/lcc/">lcc</a> is the ANSI C compiler
+described in our book <cite>A Retargetable C Compiler: Design and Implementation</cite>
+(Addison-Wesley, 1995, ISBN 0-8053-1670-1).</p>
+
+<p>If you're installing lcc on a UNIX system, read the remainder of this section and
+continue with the next section. If you're installing lcc on a Windows NT 4.0 or Windows
+95/98 system, and you intend only to <u>use</u> lcc, you can run the <a
+href="ftp://ftp.cs.princeton.edu/pub/packages/lcc/lcc41.exe">InstallShield executable</a>,
+which installs the binaries and the documentation. If you want to <u>modify</u> lcc or <u>rebuild</u>
+it from the source files, you need the <a
+href="ftp://ftp.cs.princeton.edu/packages/lcc/lcc41.zip">complete distribution</a>, and
+you should read the rest of the section, the following three sections, and the <a
+HREF="#win32">Windows NT/95/98</a> section.</p>
+
+<p>Extract the distribution into its own directory. All non-absolute paths below are
+relative to this directory. The distribution holds the following subdirectories.</p>
+
+<blockquote>
+ <table BORDER="0" CELLPADDING="1" CELLSPACING="1" WIDTH="80%">
+ <tr>
+ <td><a HREF="../src"><code>src</code></a></td>
+ <td></td>
+ <td>source code</td>
+ </tr>
+ <tr>
+ <td><a HREF="../etc"><code>etc</code></a></td>
+ <td></td>
+ <td>driver, accessories</td>
+ </tr>
+ <tr>
+ <td><a HREF="../lib"><code>lib</code></a></td>
+ <td></td>
+ <td>runtime library source code</td>
+ </tr>
+ <tr>
+ <td><a HREF="../cpp"><code>cpp</code></a></td>
+ <td></td>
+ <td>preprocessor source code</td>
+ </tr>
+ <tr>
+ <td><a HREF="../lburg"><code>lburg</code></a></td>
+ <td></td>
+ <td>code-generator generator source code</td>
+ </tr>
+ <tr>
+ <td><a HREF="../doc"><code>doc</code></a></td>
+ <td></td>
+ <td>this document, man pages</td>
+ </tr>
+ <tr>
+ <td><code><a HREF="../include">include</a>/*/*</code></td>
+ <td></td>
+ <td>include files</td>
+ </tr>
+ <tr>
+ <td><a HREF="../tst"><code>tst</code></a></td>
+ <td></td>
+ <td>test suite</td>
+ </tr>
+ <tr>
+ <td><code><a HREF="../alpha">alpha</a>/*/tst</code></td>
+ <td></td>
+ <td>ALPHA test outputs</td>
+ </tr>
+ <tr>
+ <td><code><a HREF="../mips">mips</a>/*/tst</code></td>
+ <td></td>
+ <td>MIPS test outputs</td>
+ </tr>
+ <tr>
+ <td><code><a HREF="../sparc">sparc</a>/*/tst</code></td>
+ <td></td>
+ <td>SPARC test outputs</td>
+ </tr>
+ <tr>
+ <td><code><a HREF="../x86">x86</a>/*/tst</code></td>
+ <td></td>
+ <td>X86 test outputs</td>
+ </tr>
+ </table>
+</blockquote>
+
+<p><code>doc/install.html</code> is the HTML file for this document. <a HREF="4.html"><code>doc/4.html</code></a>
+describes the internal differences between lcc 3.x and 4.1.</p>
+
+<p>The installation makefile is designed so that lcc can be installed from a read-only
+file system or directory, which is common in networked environments, so the distribution
+can be unloaded on a central file server. <strong>You will need an existing ANSI/ISO C
+compiler to build and install lcc.</strong></p>
+
+<h2><a NAME="unix">Installation on UNIX</a></h2>
+
+<p>The compilation components (the preprocessor, include files, and compiler proper, etc.)
+are installed in a single <em>build directory</em>. On multi-platform systems supported by
+a central file server, it's common to store the build directory in a location specific to
+the platform and to the version of lcc, and to point a symbolic link to this location. For
+example,</p>
+
+<blockquote>
+ <pre>% ln -s /usr/local/lib/lcc-4.1/sparc-solaris /usr/local/lib/lcc</pre>
+</blockquote>
+
+<p>points <code>/usr/local/lib/lcc</code> to a build directory for lcc version 4.1 on the
+SPARC under Solaris. Links into <code>/usr/local/lib</code> are created for the programs <code>lcc</code>
+and <code>bprint</code>. Thus, a new distribution can be installed by building it in its
+own build directory and changing one symbolic link to point to that directory. If these
+conventions or their equivalents are followed, the host-specific parts of the driver
+program, <code>lcc</code>, can be used unmodified.</p>
+
+<p>Installation on a UNIX system involves the following steps. Below, the build directory
+is referred to as <code>BUILDDIR</code>.
+
+<ol>
+ <li>Create the build directory, using a version- and platform-specific naming convention as
+ suggested above, and record the name of this directory in the <code>BUILDDIR</code>
+ environment variable:<blockquote>
+ <pre>% setenv BUILDDIR /usr/local/lib/lcc-4.1/sparc-solaris
+% mkdir -p $BUILDDIR</pre>
+ </blockquote>
+ <p>Here and below, commands assume the C shell. Also, you'll need a version of <code>mkdir</code>
+ that supports the <code>-p</code> option, which creates intermediate directories as
+ necessary.</p>
+ </li>
+ <li>Copy the man pages to the repository for local man pages, e.g.,<blockquote>
+ <pre>% cp doc/*.1 /usr/local/man/man1</pre>
+ </blockquote>
+ <p>Some users copy the man pages to the build directory and create the appropriate
+ symbolic links, e.g., </p>
+ <blockquote>
+ <pre>% cp doc/*.1 $BUILDDIR
+% ln -s $BUILDDIR/*.1 /usr/local/man/man1</pre>
+ </blockquote>
+ </li>
+ <li>Platform-specific include files are in directories named <code>include/</code><em>target</em><code>/</code><em>os</em>.
+ Create the include directory in the build directory, and copy the include hierarchy for
+ your platform to this directory, e.g.,<blockquote>
+ <pre>% mkdir $BUILDDIR/include
+% cp -p -R include/sparc/solaris/* $BUILDDIR/include</pre>
+ </blockquote>
+ <p>Again, some users create a symbolic link to the appropriate directory in the
+ distribution instead of copying the include files. For example, at Princeton, the
+ distributions are stored under <code>/proj/pkg/lcc</code>, so the included files are
+ &quot;installed&quot; by creating one symbolic link: </p>
+ <blockquote>
+ <pre>% ln -s /proj/pkg/lcc/4.1/include/sparc/solaris $BUILDDIR/include</pre>
+ </blockquote>
+ <p>If you're installing lcc on Linux, you <em>must</em> also plant a symbolic link named <code>gcc</code>
+ to gcc's library directory, because lcc uses gcc's C preprocessor and most of gcc's header
+ files:</p>
+ <blockquote>
+ <pre>% ln -s /usr/lib/gcc-lib/i486-linux/2.7.2.2 $BUILDDIR/gcc</pre>
+ </blockquote>
+ <p>The library directory shown above may be different on your Linux machine; to determine
+ the correct directory, browse <code>/usr/lib/gcc-lib</code>, or execute</p>
+ <blockquote>
+ <pre>% cc -v tst/8q.c</pre>
+ </blockquote>
+ <p>and examine the diagnostic output. Make sure that <code>$BUILDDIR/gcc/cpp</code> and <code>$BUILDDIR/gcc/include</code>
+ point to, respectively, gcc's C preprocessor and header files. On Linux, lcc looks for
+ include files in <code>$BUILDDIR/include</code>, <code>$BUILDDIR/gcc/include</code>, and <code>/usr/include</code>,
+ in that order; see <a HREF="#driver"><em>Building the Driver</em></a> and <a
+ href="../etc/linux.c"><code>etc/linux.c</code></a> for details.</p>
+ </li>
+ <li>The <a HREF="../makefile"><code>makefile</code></a> includes the file named by the <code>CUSTOM</code>
+ macro; the default is <code>custom.mk</code>, and an empty <code>custom.mk</code> is
+ included in the distribution. If desired, prepare a site-specification customization file
+ and define <code>CUSTOM</code> to the path of that file when invoking make in steps 5 and
+ 6, e.g.,<blockquote>
+ <pre>make CUSTOM=/users/drh/solaris.mk</pre>
+ </blockquote>
+ <p>You can, for example, use customization files to record site-specific values for macros
+ instead of using environment variables, and to record targets for the steps in this list.</p>
+ </li>
+ <li>Build the host-specific driver, creating a custom host-specific part, if necessary. See <a
+ HREF="#driver"><em>Building the Driver</em></a>.</li>
+ <li>Build the preprocessor, compiler proper, library, and other accessories. See <a
+ HREF="#rcc"><em>Building the Compiler</em></a>.</li>
+ <li>Plant symbolic links to the build directory and to the installed programs, e.g.,<blockquote>
+ <pre>% ln -s $BUILDDIR /usr/local/lib/lcc
+% ln -s /usr/local/lib/{lcc,bprint} /usr/local/bin</pre>
+ </blockquote>
+ <p>Some users copy <code>bprint</code> and <code>lcc</code> into <code>/usr/local/bin</code>
+ instead of creating symbolic links. The advantange of creating the links for <code>lcc</code>
+ and <code>bprint</code> as shown is that, once established, they point indirectly to
+ whatever <code>/usr/local/lib/lcc</code> points to; installing a new version of lcc, say,
+ 4.2, can be done by changing <code>/usr/local/lib/lcc</code> to point to the 4.2 build
+ directory.</p>
+ </li>
+</ol>
+
+<h2><a NAME="driver">Building the Driver</a></h2>
+
+<p>The preprocessor, compiler, assembler, and loader are invoked by a driver program, <code>lcc</code>,
+which is similar to <code>cc</code> on most systems. It's described in the man page <code>doc/lcc.1</code>.
+The driver is built by combining the host-independent part, <a href="../etc/lcc.c"><code>etc/lcc.c</code></a>,
+with a small host-specific part. Distributed host-specific parts are named <code>etc/</code><em>os</em><code>.c</code>,
+where <em>os</em> is the name of the operating system for the host on which <code>lcc</code>
+is being installed. If you're following the installations conventions described above, you
+can probably use one of the host-specific parts unmodified; otherwise, pick one that is
+closely related to your platform, copy it to <em>whatever</em><code>.c</code>, and edit it
+as described below. You should not have to edit <code>etc/lcc.c</code>.</p>
+
+<p>We'll use <a HREF="../etc/solaris.c"><code>etc/solaris.c</code></a> as an example in
+describing how the host-specific part works. This example illustrates all the important
+features. Make sure you have the environment variable <code>BUILDDIR</code> set correctly,
+and build the driver with a <code>make</code> command, e.g.,</p>
+
+<blockquote>
+ <pre>% make HOSTFILE=etc/solaris.c lcc
+cc -g -c -DTEMPDIR=\&quot;/tmp\&quot; -o /usr/local/lib/lcc-4.1/sparc-solaris/lcc.o etc/lcc.c
+cc -g -c -o /usr/local/lib/lcc-4.1/sparc-solaris/host.o etc/solaris.c
+cc -g -o /usr/local/lib/lcc-4.1/sparc-solaris/lcc /usr/local/lib/lcc-4.1/sparc-solaris/lcc.o /usr/local/lib/lcc-4.1/sparc-solaris/host.o</pre>
+</blockquote>
+
+<p>The symbolic name <code>HOSTFILE</code> specifies the path to the host-specific part,
+either one in the distribution or <em>whatever</em><code>.c</code>. Some versions of make
+may require the <code>-e</code> option in order to read the environment.</p>
+
+<p>Here's <code>etc/solaris.c</code>:</p>
+
+<blockquote>
+ <pre>/* Sparcs running Solaris 2.5.1 at CS Dept., Princeton University */
+
+#include &lt;string.h&gt;
+
+static char rcsid[] = &quot;$ Id: solaris.c,v 1.10 1998/09/14 20:36:33 drh Exp $&quot;;
+
+#ifndef LCCDIR
+#define LCCDIR &quot;/usr/local/lib/lcc/&quot;
+#endif
+#ifndef SUNDIR
+#define SUNDIR &quot;/opt/SUNWspro/SC4.2/lib/&quot;
+#endif
+
+char *suffixes[] = { &quot;.c&quot;, &quot;.i&quot;, &quot;.s&quot;, &quot;.o&quot;, &quot;.out&quot;, 0 };
+char inputs[256] = &quot;&quot;;
+char *cpp[] = { LCCDIR &quot;cpp&quot;,
+ &quot;-D__STDC__=1&quot;, &quot;-Dsparc&quot;, &quot;-D__sparc__&quot;, &quot;-Dsun&quot;, &quot;-D__sun__&quot;, &quot;-Dunix&quot;,
+ &quot;$1&quot;, &quot;$2&quot;, &quot;$3&quot;, 0 };
+char *include[] = { &quot;-I&quot; LCCDIR &quot;include&quot;, &quot;-I/usr/local/include&quot;,
+ &quot;-I/usr/include&quot;, 0 };
+char *com[] = { LCCDIR &quot;rcc&quot;, &quot;-target=sparc/solaris&quot;,
+ &quot;$1&quot;, &quot;$2&quot;, &quot;$3&quot;, 0 };
+char *as[] = { &quot;/usr/ccs/bin/as&quot;, &quot;-Qy&quot;, &quot;-s&quot;, &quot;-o&quot;, &quot;$3&quot;, &quot;$1&quot;, &quot;$2&quot;, 0 };
+char *ld[] = { &quot;/usr/ccs/bin/ld&quot;, &quot;-o&quot;, &quot;$3&quot;, &quot;$1&quot;,
+ SUNDIR &quot;crti.o&quot;, SUNDIR &quot;crt1.o&quot;,
+ SUNDIR &quot;values-xa.o&quot;, &quot;$2&quot;, &quot;&quot;,
+ &quot;-Y&quot;, &quot;P,&quot; SUNDIR &quot;:/usr/ccs/lib:/usr/lib&quot;, &quot;-Qy&quot;,
+ &quot;-L&quot; LCCDIR, &quot;-llcc&quot;, &quot;-lm&quot;, &quot;-lc&quot;, SUNDIR &quot;crtn.o&quot;, 0 };
+
+extern char *concat(char *, char *);
+
+int option(char *arg) {
+ if (strncmp(arg, &quot;-lccdir=&quot;, 8) == 0) {
+ cpp[0] = concat(&amp;arg[8], &quot;/cpp&quot;);
+ include[0] = concat(&quot;-I&quot;, concat(&amp;arg[8], &quot;/include&quot;));
+ ld[12] = concat(&quot;-L&quot;, &amp;arg[8]);
+ com[0] = concat(&amp;arg[8], &quot;/rcc&quot;);
+ } else if (strcmp(arg, &quot;-p&quot;) == 0) {
+ ld[5] = SUNDIR &quot;mcrt1.o&quot;;
+ ld[10] = &quot;P,&quot; SUNDIR &quot;libp:/usr/ccs/lib/libp:/usr/lib/libp:&quot;
+ SUNDIR &quot;:/usr/ccs/lib:/usr/lib&quot;;
+ } else if (strcmp(arg, &quot;-b&quot;) == 0)
+ ;
+ else if (strncmp(arg, &quot;-ld=&quot;, 4) == 0)
+ ld[0] = &amp;arg[4];
+ else
+ return 0;
+ return 1;
+}</pre>
+</blockquote>
+
+<p><code>LCCDIR</code> defaults to <code>&quot;/usr/local/lib/lcc/&quot;</code> unless
+it's defined by a <code>-D</code> option as part of <code>CFLAGS</code> in the make
+command, e.g.,</p>
+
+<blockquote>
+ <pre>% make HOSTFILE=etc/solaris.c CFLAGS='-DLCCDIR=\&quot;/v/lib/lcc/\&quot;' lcc</pre>
+</blockquote>
+
+<p>Note the trailing slash; <code>SUNDIR</code> is provided so you can use <code>etc/solaris.c</code>
+even if you have a different version of the Sun Pro compiler suite. If you're using the
+gcc compiler tools instead of the Sun Pro tools, see <a HREF="../etc/gcc-solaris.c"><code>etc/gcc-solaris.c</code></a>.</p>
+
+<p>Most of the host-specific code is platform-specific data and templates for the commands
+that invoke the preprocessor, compiler, assembler, and loader. The <code>suffixes</code>
+array lists the file name suffixes for C source files, preprocessed source files, assembly
+language source files, object files, and executable files. <code>suffixes</code> must be
+terminated with a null pointer, as shown above. The initialization of <code>suffixes</code>
+in <code><a HREF="../etc/solaris.c">etc/solaris.c</a></code> are the typical ones for UNIX
+systems. Each element of <code>suffixes</code> is actually a list of suffixes, separated
+by semicolons; <code><a HREF="../etc/win32.c">etc/win32.c</a></code> holds an example:</p>
+
+<blockquote>
+ <pre>char *suffixes[] = { &quot;.c;.C&quot;, &quot;.i;.I&quot;, &quot;.asm;.ASM;.s;.S&quot;, &quot;.obj;.OBJ&quot;, &quot;.exe&quot;, 0 };</pre>
+</blockquote>
+
+<p>When a list is given, the first suffix is used whenever lcc needs to generate a file
+name. For example, with <code><a HREF="../etc/win32.c">etc/win32.c</a></code>, lcc emits
+the generated assembly code into <code>.asm</code> files.</p>
+
+<p>The <code>inputs</code> array holds a null-terminated string of directories separated
+by colons or semicolons. These are used as the default value of <code>LCCINPUTS</code>, if
+the environment variable <code>LCCINPUTS</code> is not set; see the <a HREF="lcc.pdf">man
+page</a>.</p>
+
+<p>Each command template is an array of pointers to strings terminated with a null
+pointer; the strings are full path names of commands, arguments, or argument placeholders,
+which are described below. Commands are executed in a child process, and templates can
+contain multiple commands by separating commands with newlines. The driver runs each
+command in a new process.</p>
+
+<p>The <code>cpp</code> array gives the command for running lcc's preprocessor, <code>cpp</code>.
+Literal arguments specified in templates, e.g., <code>&quot;-Dsparc&quot;</code> in the <code>cpp</code>
+command above, are passed to the command as given.</p>
+
+<p>The strings <code>&quot;$1&quot;</code>, <code>&quot;$2&quot;</code>, and <code>&quot;$3&quot;</code>
+in templates are placeholders for <em>lists</em> of arguments that are substituted in a
+copy of the template before the command is executed. <code>$1</code> is replaced by the <em>options</em>
+specified by the user; for the preprocessor, this list always contains at least <code>-D__LCC__</code>.
+<code>$2</code> is replaced by the <em>input</em> files, and <code>$3</code> is replaced
+by the <em>output</em> file.</p>
+
+<p>Zero-length arguments after replacement are removed from the argument list before the
+command is invoked. So, for example, if the preprocessor is invoked without an output
+file, <code>&quot;$3&quot;</code> becomes <code>&quot;&quot;</code>, which is removed from
+the final argument list.</p>
+
+<p>The <code>include</code> array is a list of <code>-I</code> options that specify which
+directives should be searched to satisfy include directives. These directories are
+searched in the order given. The first directory should be the one to which the ANSI
+header files were copied as described in <a HREF="#unix">UNIX</a> or <a HREF="#win32">Windows</a>
+installation instructions. The driver adds these options to <code>cpp</code>'s arguments
+when it invokes the preprocessor, except when <code>-N</code> is specified.</p>
+
+<p><code>com</code> gives the command for invoking the compiler. This template can appear
+as shown above in a custom host-specific part, but the option <code>-target=sparc/solaris</code>
+should be edited to the <em>target</em><code>/</code><em>os</em> for your platform. If <code>com[1]</code>
+includes the string &quot;<code>win32</code>&quot;, the driver assumes it's running on
+Windows. lcc can generate code for <em>all</em> of the <em>target</em><code>/</code><em>os</em>
+combinations listed in the file <code>src/bind.c</code>. The <code>-target</code> option
+specifies the default combination. The driver's <code>-Wf</code> option can be used to
+specify other combinations; the <a HREF="lcc.pdf">man page</a> elaborates.</p>
+
+<p><code>as</code> gives the command for invoking the assembler. On Linux, you must be
+running at least version 2.8.1 of the GNU assembler; earlier versions mis-assemble some
+instructions emitted by lcc.</p>
+
+<p><code>ld</code> gives the command for invoking the loader. For the other commands, the
+list <code>$2</code> contains a single file; for <code>ld</code>, <code>$2</code> contains
+all &quot;.o&quot; files and libraries, and <code>$3</code> is <code>a.out</code>, unless
+the <code>-o</code> option is specified. As suggested in the code above, <code>ld</code>
+must also specify the appropriate startup code and default libraries, including the lcc
+library, <code>liblcc.a</code>.</p>
+
+<p>The <code>option</code> function is described below; the minimal <code>option</code>
+function just returns 0.</p>
+
+<p>You can test <code>lcc</code> with the options <code>-v -v</code> to display the
+commands that would be executed, e.g.,</p>
+
+<blockquote>
+ <pre>% $BUILDDIR/lcc -v -v foo.c baz.c mylib.a -lX11
+/usr/local/lib/lcc-4.1/lcc $ Id: solaris.c,v 1.10 1998/09/14 20:36:33 drh Exp $
+foo.c:
+/usr/local/lib/lcc/cpp -D__STDC__=1 -Dsparc -D__sparc__ -Dsun -D__sun__ -Dunix -D__LCC__ -I/usr/local/lib/lcc/include -I/usr/local/include -I/usr/include foo.c /tmp/lcc266290.i
+/usr/local/lib/lcc/rcc -target=sparc/solaris -v /tmp/lcc266290.i /tmp/lcc266291.
+s
+/usr/ccs/bin/as -Qy -s -o /tmp/lcc266292.o /tmp/lcc266291.s
+baz.c:
+/usr/local/lib/lcc/cpp -D__STDC__=1 -Dsparc -D__sparc__ -Dsun -D__sun__ -Dunix -D__LCC__ -I/usr/local/lib/lcc/include -I/usr/local/include -I/usr/include baz.c /tmp/lcc266290.i
+/usr/local/lib/lcc/rcc -target=sparc/solaris -v /tmp/lcc266290.i /tmp/lcc266291.s
+/usr/ccs/bin/as -Qy -s -o /tmp/lcc266293.o /tmp/lcc266291.s
+/usr/ccs/bin/ld -o a.out /opt/SUNWspro/SC4.2/lib/crti.o /opt/SUNWspro/SC4.2/lib/crt1.o /opt/SUNWspro/SC4.2/lib/values-xa.o /tmp/lcc266292.o /tmp/lcc266293.o mylib.a -lX11 -Y P,/opt/SUNWspro/SC4.2/lib/:/usr/ccs/lib:/usr/lib -Qy -L/usr/local/lib/lcc/ -llcc -lm -lc /opt/SUNWspro/SC4.2/lib/crtn.o
+rm /tmp/lcc266293.o /tmp/lcc266290.i /tmp/lcc266291.s /tmp/lcc266292.o</pre>
+</blockquote>
+
+<p>As the output shows, <code>lcc</code> places temporary files in <code>/tmp</code>; if
+any of the environment variables <code>TMP</code>, <code>TEMP</code>, and <code>TMPDIR</code>
+are set, they override this default (in the order shown) as does the <code>-tempdir=</code><em>dir</em>
+option. The default can be changed by defining <code>TEMPDIR</code> in <code>CFLAGS</code>
+when building the driver.</p>
+
+<p>The <code>option</code> function is called for the options <code>-Wo</code>, <code>-g</code>,
+<code>-p</code>, <code>-pg</code>, and <code>-b</code> because these compiler options
+might also affect the loader's arguments. For these options, the driver calls <code>option(arg)</code>
+to give the host-specific code an opportunity to edit the <code>ld</code> command, if
+necessary. <code>option</code> can change <code>ld</code>, if necessary, and return 1 to
+announce its acceptance of the option. If the option is unsupported, <code>option</code>
+should return 0.</p>
+
+<p>For example, in response to <code>-g</code>, the <code>option</code> function shown
+above accepts the option but does nothing else, because the <code>ld</code> and <code>as</code>
+commands don't need to be modified on the SPARC. <code>-g</code> will also be added to the
+compiler's options by the host-independent part of the driver. The <code>-p</code> causes <code>option</code>
+to change the name of the startup code and changed the list of libraries. The <code>-b</code>
+option turns on <code>lcc</code>'s per-expression profiling, the code for which is in <code>liblcc.a</code>,
+so <code>option</code> need no nothing.</p>
+
+<p>On SPARCs, the driver also recognizes <code>-Bstatic</code> and <code>-Bdynamic</code>
+as linker options. The driver recognizes but ignores &quot;<code>-target</code> <em>name</em>&quot;
+option.</p>
+
+<p>The option <code>-Wo</code><em>arg</em> causes the driver to pass <em>arg</em> to <code>option</code>.
+Such options have no other effect; this mechanism is provided to support system-specific
+options that affect the commands executed by the driver. As illustrated above,
+host-specific parts should support the <code>-Wo-lccdir=</code><em>dir</em> option, which
+causes lcc's compilation components to be found in <em>dir</em>, because this option is
+used by the test scripts, and because the driver simulates a <code>-Wo-lccdir</code>
+option with the value of the environment variable <code>LCCDIR</code>, if it's defined.
+The code above rebuilds the paths to the include files, preprocessor, compiler, and
+library by calling <code>concat</code>, which is defined in <code>etc/lcc.c</code>.</p>
+
+<h2><a NAME="rcc">Building the Compiler and Accessories</a></h2>
+
+<p>To build the rest of compilation components make sure <code>BUILDDIR</code> is set
+appropriately and type &quot;<code>make all</code>&quot;. This command builds <code>librcc.a</code>
+(the compiler's private library), <code>rcc</code> (the compiler proper), <code>lburg</code>
+(the code-generator generator), <code>cpp</code> (the preprocessor), <code>liblcc.a</code>
+(the runtime library), and <code>bprint</code> (the profile printer), all in <code>BUILDDIR</code>.
+There may be warnings, but there should be no errors. If you're using an ANSI/ISO compiler
+other than <code>cc</code>, specify its name with the <code>CC=</code> option, e.g.,
+&quot;<code>make CC=gcc all</code>&quot;. If you're running on a DEC ALPHA, use &quot;<code>make
+CC='cc -std1' all</code>&quot;; the <code>-std1</code> option is essential on the ALPHA.
+If you're on a DEC 5000 running Ultrix 4.3, use &quot;<code>make CC=c89 all</code>&quot;.</p>
+
+<p>Once <code>rcc</code> is built with the host C compiler, run the test suite to verify
+that <code>rcc</code> is working correctly. If any of the steps below fail, contact us
+(see <a HREF="#bugs"><em>Reporting Bugs</em></a>). The commands in the makefile run the
+shell script <code>src/run.sh</code> on each C program in the test suite, <code>tst/*.c</code>.
+It uses the driver, <code>$BUILDDIR/lcc</code>, so you must have the driver in the build
+directory before testing <code>rcc</code>. The <em>target</em><code>/</code><em>os</em>
+combination is read from the variable <code>TARGET</code>, which must be specified when
+invoking <code>make</code>:</p>
+
+<blockquote>
+ <pre>% make TARGET=sparc/solaris test
+mkdir -p /usr/local/lib/lcc-4.1/sparc-solaris/sparc/solaris/tst
+/usr/local/lib/lcc-4.1/sparc-solaris/rcc -target=sparc/solaris /usr/local/lib/lcc-4.1/sparc-solaris/sparc/solaris/tst/8q.s:
+/usr/local/lib/lcc-4.1/sparc-solaris/rcc -target=sparc/solaris /usr/local/lib/lcc-4.1/sparc-solaris/sparc/solaris/tst/array.s:
+/usr/local/lib/lcc-4.1/sparc-solaris/rcc -target=sparc/solaris /usr/local/lib/lcc-4.1/sparc-solaris/sparc/solaris/tst/cf.s:
+/usr/local/lib/lcc-4.1/sparc-solaris/rcc -target=sparc/solaris /usr/local/lib/lcc-4.1/sparc-solaris/sparc/solaris/tst/cq.s:
+/usr/local/lib/lcc-4.1/sparc-solaris/rcc -target=sparc/solaris /usr/local/lib/lcc-4.1/sparc-solaris/sparc/solaris/tst/cvt.s:
+/usr/local/lib/lcc-4.1/sparc-solaris/rcc -target=sparc/solaris /usr/local/lib/lcc-4.1/sparc-solaris/sparc/solaris/tst/fields.s:
+/usr/local/lib/lcc-4.1/sparc-solaris/rcc -target=sparc/solaris /usr/local/lib/lcc-4.1/sparc-solaris/sparc/solaris/tst/front.s:
+/usr/local/lib/lcc-4.1/sparc-solaris/rcc -target=sparc/solaris /usr/local/lib/lcc-4.1/sparc-solaris/sparc/solaris/tst/incr.s:
+/usr/local/lib/lcc-4.1/sparc-solaris/rcc -target=sparc/solaris /usr/local/lib/lcc-4.1/sparc-solaris/sparc/solaris/tst/init.s:
+/usr/local/lib/lcc-4.1/sparc-solaris/rcc -target=sparc/solaris /usr/local/lib/lcc-4.1/sparc-solaris/sparc/solaris/tst/limits.s:
+/usr/local/lib/lcc-4.1/sparc-solaris/rcc -target=sparc/solaris /usr/local/lib/lcc-4.1/sparc-solaris/sparc/solaris/tst/paranoia.s:
+/usr/local/lib/lcc-4.1/sparc-solaris/rcc -target=sparc/solaris /usr/local/lib/lcc-4.1/sparc-solaris/sparc/solaris/tst/sort.s:
+/usr/local/lib/lcc-4.1/sparc-solaris/rcc -target=sparc/solaris /usr/local/lib/lcc-4.1/sparc-solaris/sparc/solaris/tst/spill.s:
+/usr/local/lib/lcc-4.1/sparc-solaris/rcc -target=sparc/solaris /usr/local/lib/lcc-4.1/sparc-solaris/sparc/solaris/tst/stdarg.s:
+/usr/local/lib/lcc-4.1/sparc-solaris/rcc -target=sparc/solaris /usr/local/lib/lcc-4.1/sparc-solaris/sparc/solaris/tst/struct.s:
+/usr/local/lib/lcc-4.1/sparc-solaris/rcc -target=sparc/solaris /usr/local/lib/lcc-4.1/sparc-solaris/sparc/solaris/tst/switch.s:
+/usr/local/lib/lcc-4.1/sparc-solaris/rcc -target=sparc/solaris /usr/local/lib/lcc-4.1/sparc-solaris/sparc/solaris/tst/wf1.s:
+/usr/local/lib/lcc-4.1/sparc-solaris/rcc -target=sparc/solaris /usr/local/lib/lcc-4.1/sparc-solaris/sparc/solaris/tst/yacc.s:</pre>
+</blockquote>
+
+<p>Each line in the output above is of the form</p>
+
+<blockquote>
+ <p><code>$BUILDDIR/rcc -target=</code><em>target</em><code>/</code><em>os</em><code>$BUILDDIR/</code><em>target</em><code>/</code><em>os</em><code>/</code><em>X</em><code>.s:</code></p>
+</blockquote>
+
+<p>where <em>X</em> is the base name of the C program <em>X</em><code>.c</code> in the
+test suite. This output identifies the compiler and the target, e.g., &quot;<code>$BUILDDIR/rcc</code>
+is generating code for a <code>sparc</code> running the <code>solaris</code> operating
+system.&quot;</p>
+
+<p>For each program in the test suite, <code>src/run.sh</code> compiles the program, drops
+the generated assembly language code in <code>BUILDDIR</code>/<em>target</em><code>/</code><em>os</em>,
+and uses <code>diff</code> to compare the generated assembly code with the expected code
+(the code expected for <code>tst/8q.c</code> on the SPARC under Solaris is in <code>sparc/solaris/tst/8q.sbk</code>,
+etc.). If there are differences, the script executes the generated code with the input
+given in <code>tst</code> (the input for <code>tst/8q.c</code> is in <code>tst/8q.0</code>,
+etc.) and compares the output with the expected output (the expected output from <code>tst/8q.c</code>
+on the SPARC under Solaris is in <code>sparc/solaris/tst/8q.1bk</code>, etc.). The script
+also compares the diagnostics from the compiler with the expected diagnostics.</p>
+
+<p>On some systems, there may be a few differences between the generated code and the
+expected code. These differences occur because the expected code is generated by cross
+compilation and the least significant bits of some floating-point constants differ from
+those bits in constants generated on your system. On Linux, there may be differences
+because of differences in the header files between our system and yours. There should be
+no differences in the output from executing the test programs.</p>
+
+<p>Next, run the &quot;triple test&quot;, which builds <code>rcc</code> using itself:</p>
+
+<blockquote>
+ <pre>% make triple
+/usr/local/lib/lcc-4.1/sparc-solaris/lcc -o /usr/local/lib/lcc-4.1/sparc-solaris/1rcc -d0.6 -Wo-lccdir=/usr/local/lib/lcc-4.1/sparc-solaris -B/usr/local/lib/lcc-4.1/sparc-solaris/ -Isrc src/*.c
+src/alloc.c:
+...
+src/x86.c:
+/usr/local/lib/lcc-4.1/sparc-solaris/lcc -o /usr/local/lib/lcc-4.1/sparc-solaris/1rcc -d0.6 -Wo-lccdir=/usr/local/lib/lcc-4.1/sparc-solaris -B/usr/local/lib/lcc-4.1/sparc-solaris/ -Isrc src/*.c
+src/alloc.c:
+...
+src/x86.c:
+strip /usr/local/lib/lcc-4.1/sparc-solaris/[12]rcc
+dd if=/usr/local/lib/lcc-4.1/sparc-solaris/1rcc of=/usr/local/lib/lcc-4.1/sparc-solaris/rcc1 bs=512 skip=1
+769+1 records in
+769+1 records out
+dd if=/usr/local/lib/lcc-4.1/sparc-solaris/2rcc of=/usr/local/lib/lcc-4.1/sparc-solaris/rcc2 bs=512 skip=1
+769+1 records in
+769+1 records out
+if cmp /usr/local/lib/lcc-4.1/sparc-solaris/rcc[12]; then \
+ mv /usr/local/lib/lcc-4.1/sparc-solaris/2rcc /usr/local/lib/lcc-4.1/sparc-solaris/rcc; \
+ rm -f /usr/local/lib/lcc-4.1/sparc-solaris/1rcc /usr/local/lib/lcc-4.1/sparc-solaris/rcc[12]; fi</pre>
+</blockquote>
+
+<p>This command builds <code>rcc</code> twice; once using the <code>rcc</code> built by <code>cc</code>
+and again using the <code>rcc</code> built by <code>lcc</code>. The resulting binaries are
+compared. They should be identical, as shown at the end of the output above. If they
+aren't, our compiler is generating incorrect code; <a HREF="#bugs">contact</a> us.</p>
+
+<p>The final version of <code>rcc</code> should also pass the test suite; that is, the
+output from</p>
+
+<blockquote>
+ <pre>% make TARGET=sparc/solaris test</pre>
+</blockquote>
+
+<p>should be identical to that from the previous <code>make test</code>.</p>
+
+<p>The command &quot;<code>make clean</code>&quot; cleans up, but does not remove <code>rcc</code>,
+etc., and &quot;<code>make clobber</code>&quot; cleans up and removes <code>lcc</code>, <code>rcc</code>,
+and the other accessories. Test directories under <code>BUILDDIR</code> are <em>not</em>
+removed; you'll need to remove these by hand, e.g.,</p>
+
+<blockquote>
+ <pre>% rm -fr $BUILDDIR/sparc</pre>
+</blockquote>
+
+<p>The code generators for the other targets can be tested by specifying the desired <em>target</em><code>/</code><em>os</em>
+and setting an environment variable that controls what <code>src/run.sh</code> does. For
+example, to test the MIPS code generator, type</p>
+
+<blockquote>
+ <pre>% setenv REMOTEHOST noexecute
+% make TARGET=mips/irix test</pre>
+</blockquote>
+
+<p>As above, <code>src/run.sh</code> compares the MIPS code generated with what's
+expected. There should be no differences. Setting <code>REMOTEHOST</code> to <code>noexecute</code>
+suppresses the assembly and execution of the generated code. If you set <code>REMOTEHOST</code>
+to the name of a MIPS machine to which you can <code>rlogin</code>, <code>src/run.sh</code>
+will <code>rcp</code> the generated code to that machine and execute it there, if
+necessary. See <code>src/run.sh</code> for the details.</p>
+
+<p>You can use lcc as a cross compiler. The options <code>-S</code> and <code>-Wf-target=</code><em>target/os</em>
+generate assembly code for the specified target, which is any of those listed in the file <code>src/bind.c</code>.
+For example, </p>
+
+<blockquote>
+ <pre>% lcc -Wf-target=mips/irix -S tst/8q.c</pre>
+</blockquote>
+
+<p>generates MIPS code for <code>tst/8q.c</code> in <code>8q.s</code>.</p>
+
+<p>lcc can also generate code for a &quot;symbolic&quot; target. This target is used
+routinely in front-end development, and its output is a printable representation of the
+input program, e.g., the dags constructed by the front end are printed, and other
+interface functions print their arguments. You can specify this target with the option <code>-Wf-target=symbolic</code>.
+For example,</p>
+
+<blockquote>
+ <pre>% lcc -Wf-target=symbolic -S tst/8q.c</pre>
+</blockquote>
+
+<p>generates symbolic output for <code>tst/8q.c</code> in <code>8q.s</code>. Adding <code>-Wf-html</code>
+causes the symbolic target to emit HTML instead of plain text. Finally, the option <code>-Wf-target=null</code>
+specifies the &quot;null&quot; target for which lcc emits nothing and thus only checks the
+syntax and semantics of its input files.</p>
+
+<h2><a NAME="win32">Installation on Windows NT 4.0 or Windows 95/98</a></h2>
+
+<p>On Windows NT 4.0 and Windows 95/98, lcc is designed to work with Microsoft's Visual
+C++ 5.0 (VC) and Microsoft's Assembler, MASM 6.11d. It uses the VC header files,
+libraries, and command-line tools, and it uses MASM to assemble the code it generates. If
+you have MASM 6.11, make sure you <a
+HREF="http://support.microsoft.com/support/kb/articles/Q138/9/83.asp">upgrade to 6.11d</a>,
+because earlier 6.11 releases do not generate correct COFF object files.</p>
+
+<p>Building the distribution components from the ground up requires Microsoft's Visual
+C/C++ 5.0 compiler, Microsoft's make, <code>nmake</code>, and the standard Windows command
+interpreter. <a HREF="../makefile.nt"><code>makefile.nt</code></a> is written to use only <code>nmake</code>.
+As on UNIX systems, the compilation components are installed in a single <em>build
+directory</em>, and the top-level programs, <code>lcc.exe</code> and <code>bprint.exe</code>,
+are installed in a directory on the PATH. If the conventions used below are followed, the
+Windows-specific parts of the driver program, <code>lcc.exe</code>, can be used
+unmodified.</p>
+
+<p>Building from the source distribution on a Windows system involves the following steps.
+Below, the build directory is referred to as <code>BUILDDIR</code>, and the distribution
+is in <code>\dist\lcc\4.1</code>.
+
+<ol>
+ <li>Create the build directory, perhaps using a version- and platform-specific naming
+ convention as suggested in <a HREF="#unix"><em>Installation on UNIX</em></a>, and record
+ the name of this directory in the <code>BUILDDIR</code> environment variable:<blockquote>
+ <pre>C:\dist\lcc\4.1&gt;set BUILDDIR=\progra~1\lcc\4.1\bin
+C:\dist\lcc\4.1&gt;mkdir %BUILDDIR%</pre>
+ </blockquote>
+ <p>The default build, or installation, directory is <code>\Program Files\lcc\4.1\bin</code>,
+ but the <code>nmake</code> commands require that you use the corresponding 8.3 file name, <code>progra~1</code>,
+ instead of <code>Program Files</code>.</p>
+ </li>
+ <li><a HREF="../etc/win32.c"><code>etc\win32.c</code></a> is the Windows-specific part of
+ the driver. It assumes that environment variable <code>include</code> gives the locations
+ of the VC header files and that the linker (<code>link.exe</code>) and the assembler (<code>ml.exe</code>)
+ are on the PATH. It also assumes that the macro <code>LCCDIR</code> gives the build
+ directory. If necessary, revise a copy of <a HREF="../etc/win32.c"><code>etc\win32.c</code></a>
+ to reflect the conventions on your computer (see <a HREF="#driver"><em>Building the Driver</em></a>),
+ then build the driver, specifying the default temporary directory, if necessary:<blockquote>
+ <pre>C:\dist\lcc\4.1&gt;nmake -f makefile.nt TEMPDIR=\\temp HOSTFILE=etc/win32.c lcc
+...
+ cl -nologo -Zi -MLd -Fd\progra~1\lcc\4.1\bin\ -c -DTEMPDIR=\&quot;\\temp\&quot; -Fo\progra~1\lcc\4.1\bin\lcc.obj etc/lcc.c
+lcc.c
+ cl -nologo -Zi -MLd -Fd\progra~1\lcc\4.1\bin\ -c -Fo\progra~1\lcc\4.1\bin\host.obj etc/win32.c
+win32.c
+ cl -nologo -Zi -MLd -Fd\progra~1\lcc\4.1\bin\ -Fe\progra~1\lcc\4.1\bin\lcc.exe \progra~1\lcc\4.1\bin\lcc.obj \progra~1\lcc\4.1\bin\host.obj</pre>
+ </blockquote>
+ <p>If you make a copy of <code>etc\win32.c</code>, specify the path of the copy as the
+ value of <code>HOSTFILE</code>. For example, if you copy <code>etc\win32.c</code> to <code>BUILDDIR</code>
+ and edit it, use the command</p>
+ <blockquote>
+ <pre>C:\dist\lcc\4.1&gt;nmake -f makefile.nt TEMPDIR=\\temp HOSTFILE=%BUILDDIR%\win32.c lcc</pre>
+ </blockquote>
+ </li>
+ <li>Build the preprocessor, compiler proper, library, and other accessories (see <a
+ HREF="#rcc"><em>Building the Compiler</em></a>):<blockquote>
+ <pre>C:\dist\lcc\4.1&gt;nmake -f makefile.nt all</pre>
+ </blockquote>
+ <p>This command uses the VC command-line tools <code>cl</code> and <code>lib</code> to
+ build <code>bprint.exe</code>, <code>cpp.exe</code>, <code>lburg.exe</code>, <code>liblcc.lib</code>,
+ <code>librcc.lib</code>, and <code>rcc.exe</code>, all in <code>BUILDDIR</code>. There may
+ be some warnings, but there should be no warnings.</p>
+ </li>
+ <li>Create a test directory and run the test suite:<blockquote>
+ <pre>C:\dist\lcc\4.1&gt;mkdir %BUILDDIR%\x86\win32\tst
+C:\dist\lcc\4.1&gt;nmake -f makefile.nt test</pre>
+ </blockquote>
+ <p>This command compiles each program in <a HREF="../tst">tst</a>, compares the generated
+ assembly code and diagnostics with the expected assembly code and diagnostics, executes
+ the program, and compares the output with the expected output (using <code>fc</code>). For
+ example, when the nmake command compiles <a HREF="../tst/8q.c"><code>tst\8q.c</code></a>,
+ it leaves the generated assembly code and diagnostic output in <code>%BUILDDIR%\x86\win32\tst\8q.s</code>
+ and <code>%BUILDDIR%\x86\win32\tst\8q.2</code>, and it compares them with the expected
+ results in <code>x86\win32\tst\8q.sbk</code>. It builds the executable program in <code>%BUILDDIR%\x86\win32\tst\8q.exe</code>,
+ runs it, and redirects the output to <code>%BUILDDIR%\x86\win32\tst\8q.1</code>, which it
+ compares with <code>x86\win32\tst\8q.1bk</code>. The output from this step is voluminous,
+ but there should be no differences and no errors.</p>
+ </li>
+ <li>Run the &quot;triple&quot; test, which compiles <code>rcc</code> with itself and
+ verifies the results:<blockquote>
+ <pre>C:\dist\lcc\4.1&gt;nmake -f makefile.nt triple
+...
+\progra~1\lcc\4.1\bin\x86.c:
+ Assembling: C:/TEMP/lcc2001.asm
+ fc /b \progra~1\lcc\4.1\bin\1rcc.exe \progra~1\lcc\4.1\bin\2rcc.exe
+Comparing files \progra~1\lcc\4.1\bin\1rcc.exe and \progra~1\lcc\4.1\bin\2RCC.EXE
+00000088: B4 D5</pre>
+ </blockquote>
+ <p>This command builds <code>rcc</code> twice; once using the <code>rcc</code> built by VC
+ and again using the <code>rcc</code> built by <code>lcc</code>. The resulting binaries are
+ compared using <code>fc</code>. They should be identical, except for one or two bytes of
+ timestamp data, as shown at the end of the output above. If they aren't, our compiler is
+ generating incorrect code; <a HREF="#bugs">contact</a> us.</p>
+ </li>
+ <li>Copy <code>lcc.exe</code> and <code>bprint.exe</code> to a directory on your PATH, e.g.,<blockquote>
+ <pre>C:\dist\lcc\4.1&gt;copy %BUILDDIR%\lcc.exe \bin
+ 1 file(s) copied.
+
+C:\dist\lcc\4.1&gt;copy %BUILDDIR%\bprint.exe \bin
+ 1 file(s) copied.</pre>
+ </blockquote>
+ </li>
+ <li>Finally, clean up:<blockquote>
+ <pre>C:\dist\lcc\4.1&gt;nmake -f makefile.nt clean</pre>
+ </blockquote>
+ <p>This command removes the derived files in <code>BUILDDIR</code>, but does not remove <code>rcc.exe</code>,
+ etc.; &quot;<code>nmake -f makefile.nt clobber</code>&quot; cleans up and removes all
+ executables and libraries. Test directories under <code>BUILDDIR</code> are <em>not</em>
+ removed; you'll need to remove these by hand, e.g.,</p>
+ <blockquote>
+ <pre>C:\dist\lcc\4.1&gt;rmdir %BUILDDIR%\x86 /s
+\progra~1\lcc\4.1\bin\x86, Are you sure (Y/N)? y</pre>
+ </blockquote>
+ </li>
+</ol>
+
+<h2><a NAME="bugs">Reporting Bugs</a></h2>
+
+<p>lcc is a large, complex program. We find and repair errors routinely. If you think that
+you've found a error, follow the steps below, which are adapted from the instructions in
+Chapter 1 of <cite>A Retargetable C Compiler: Design and Implementation</cite>.
+
+<ol>
+ <li>If you don't have a source file that displays the error, create one. Most errors are
+ exposed when programmers try to compile a program they think is valid, so you probably
+ have a demonstration program already.</li>
+ <li>Preprocess the source file and capture the preprocessor output. Discard the original
+ code.</li>
+ <li>Prune your source code until it can be pruned no more without sending the error into
+ hiding. We prune most error demonstrations to fewer than five lines.</li>
+ <li>Confirm that the source file displays the error with the <em>distributed</em> version of
+ lcc. If you've changed lcc and the error appears only in your version, then you'll have to
+ chase the error yourself, even if it turns out to be our fault, because we can't work on
+ your code.</li>
+ <li>Annotate your code with comments that explain why you think that lcc is wrong. If lcc
+ dies with an assertion failure, please tell us where it died. If lcc crashes, please
+ report the last part of the call chain if you can. If lcc is rejecting a program you think
+ is valid, please tell us why you think it's valid, and include supporting page numbers in
+ the ANSI Standard, Appendix A in <cite>The C Programming Language</cite>, or the
+ appropriate section in <cite>C: A Reference Manual</cite>, 4th edition by S. B. Harbison
+ and G. L. Steele, Jr. (Prentice Hall, 1995). If lcc silently generates incorrect code for
+ some construct, please include the corrupt assembly code in the comments and flag the
+ incorrect instructions if you can.</li>
+ <li>Confirm that your error hasn't been fixed already. The latest version of lcc is always
+ available for anonymous <code>ftp</code> from <code>ftp.cs.princeton.edu</code> in <a
+ HREF="ftp://ftp.cs.princeton.edu/pub/lcc"><code>pub/lcc</code></a>. A <a
+ HREF="ftp://ftp.cs.princeton.edu/pub/lcc/README"><code>README</code></a> file there gives
+ acquistion details, and the <a HREF="../LOG"><code>LOG</code></a> file reports what errors
+ were fixed and when they were fixed. If you report a error that's been fixed, you might
+ get a canned reply.</li>
+ <li>Send your program by electronic mail to <code>lcc-bugs@cs.princeton.edu</code>. Please
+ send only valid C programs; put all remarks in C comments so that we can process reports
+ semiautomatically.</li>
+</ol>
+
+<h2><a NAME="mailinglist">Keeping in Touch</a></h2>
+
+<p>There is an lcc mailing list for general information about lcc. To be added to the
+list, send a message with the 1-line body</p>
+
+<blockquote>
+ <pre>subscribe lcc</pre>
+</blockquote>
+
+<p>to <code>majordomo@cs.princeton.edu</code>. This line must appear in the message body;
+&quot;Subject:&quot; lines are ignored. To learn more about mailing lists served by <code>majordomo</code>,
+send a message with the 1-word body &quot;<code>help</code>&quot; to <code>majordomo@cs.princeton.edu</code>.
+Mail sent to <code>lcc@cs.princeton.edu</code> is forwarded to everyone on the mailing
+list.</p>
+
+<p>There is also an <code>lcc-bugs</code> mailing list for reporting bugs; subscribe to it
+by sending a message with the 1-line body </p>
+
+<blockquote>
+ <pre>subscribe lcc-bugs</pre>
+</blockquote>
+
+<p>to <code>majordomo@cs.princeton.edu</code>. Mail addressed to <var>lcc-bugs@cs.princeton.edu</var>
+is forwarded to everyone on this list.</p>
+
+<hr>
+
+<address>
+ <a HREF="http://www.research.microsoft.com/~cwfraser/">Chris Fraser</a> / <a
+ HREF="mailto:cwfraser@microsoft.com">cwfraser@microsoft.com</a><br>
+ <a HREF="http://www.research.microsoft.com/~drh/">David Hanson</a> / <a
+ HREF="mailto:drh@microsoft.com">drh@microsoft.com</a><br>
+ $Revision: 145 $ $Date: 2001-10-17 16:53:10 -0500 (Wed, 17 Oct 2001) $
+</address>
+</body>
+</html>
diff --git a/src/tools/lcc/doc/lcc.1 b/src/tools/lcc/doc/lcc.1
new file mode 100644
index 0000000..fe91bca
--- /dev/null
+++ b/src/tools/lcc/doc/lcc.1
@@ -0,0 +1,605 @@
+.\" $Id: lcc.1 145 2001-10-17 21:53:10Z timo $
+.TH LCC 1 "local \- $Date: 2001-10-17 16:53:10 -0500 (Wed, 17 Oct 2001) $"
+.SH NAME
+lcc \- ANSI C compiler
+.SH SYNOPSIS
+.B lcc
+[
+.I option
+|
+.I file
+]...
+.br
+.SH DESCRIPTION
+.PP
+.I lcc
+is an ANSI C compiler for a variety of platforms.
+.PP
+Arguments whose names end with `.c' (plus `.C' under Windows) are taken to be
+C source programs; they are preprocessed, compiled, and
+each object program is left on the file
+whose name is that of the source with `.o' (UNIX) or `.obj' (Windows)
+substituted for the extension.
+Arguments whose names end with `.i' are treated similarly,
+except they are not preprocessed.
+In the same way,
+arguments ending with `.s' (plus `.S', `.asm', and `.ASM', under Windows)
+are taken to be assembly source programs
+and are assembled, producing an object file.
+If there are no arguments,
+.I lcc
+summarizes its options on the standard error.
+.PP
+.I lcc
+deletes an object file if and only if exactly one
+source file is mentioned and no other file
+(source, object, library) or
+.B \-l
+option is mentioned.
+.PP
+If the environment variable
+.B LCCINPUTS
+is set,
+.I lcc
+assumes it gives a semicolon- or colon-separated list of directories in which to
+look for source and object files whose names do not begin with `/'.
+These directories are also added to the list of directories
+searched for libraries.
+If
+.B LCCINPUTS
+is defined, it must contain `.' in order for the current directory
+to be searched for input files.
+.PP
+.I lcc
+uses ANSI standard header files (see `FILES' below).
+Include files not found in the ANSI header files
+are taken from the normal default include areas,
+which usually includes
+.BR /usr/include .
+Under Windows, if the environment variable
+.B include
+is defined, it gives a semicolon-separated list of directories in which to search for
+header files.
+.PP
+.I lcc
+interprets the following options; unrecognized options are
+taken as loader options (see
+.IR ld (1))
+unless
+.BR \-c ,
+.BR \-S ,
+or
+.B \-E
+precedes them.
+Except for
+.BR \-l ,
+all options are processed before any of the files
+and apply to all of the files.
+Applicable options are passed to each compilation phase in the order given.
+.TP
+.B \-c
+Suppress the loading phase of the compilation, and force
+an object file to be produced even if only one program is compiled.
+.TP
+.B \-g
+Produce additional symbol table information for the local debuggers.
+.I lcc
+warns when
+.B \-g
+is unsupported.
+.TP
+.BI \-Wf\-g n , x
+Set the debugging level to
+.I n
+and emit source code as comments into the generated assembly code;
+.I x
+must be the assembly language comment character.
+If
+.I n
+is omitted, it defaults to 1, which is similar to
+.BR \-g .
+Omitting
+.BI , x
+just sets the debugging level to
+.IR n .
+.TP
+.B \-w
+Suppress warning diagnostics, such as those
+announcing unreferenced statics, locals, and parameters.
+The line
+.I
+#pragma ref id
+simulates a reference to the variable
+.IR id .
+.TP
+.BI \-d n
+Generate jump tables for switches whose density is at least
+.IR n ,
+a floating point constant between zero and one.
+The default is 0.5.
+.TP
+.B \-A
+Warns about
+declarations and casts of function types without prototypes,
+assignments between pointers to ints and pointers to enums, and
+conversions from pointers to smaller integral types.
+A second
+.B \-A
+warns about
+unrecognized control lines,
+nonANSI language extensions and source characters in literals,
+unreferenced variables and static functions,
+declaring arrays of incomplete types,
+and exceeding
+.I some
+ANSI environmental limits, like more than 257 cases in switches.
+It also arranges for duplicate global definitions in separately compiled
+files to cause loader errors.
+.TP
+.B \-P
+Writes declarations for all defined globals on standard error.
+Function declarations include prototypes;
+editing this output can simplify conversion to ANSI C.
+This output may not correspond to the input when
+there are several typedefs for the same type.
+.TP
+.B \-n
+Arrange for the compiler to produce code
+that tests for dereferencing zero pointers.
+The code reports the offending file and line number and calls
+.IR abort (3).
+.TP
+.B \-O
+is ignored.
+.TP
+.B \-S
+Compile the named C programs, and leave the
+assembler-language output on corresponding files suffixed `.s' or `.asm'.
+.TP
+.B \-E
+Run only the preprocessor on the named C programs
+and unsuffixed file arguments,
+and send the result to the standard output.
+.TP
+.BI \-o " output"
+Name the output file
+.IR output .
+If
+.B \-c
+or
+.B \-S
+is specified and there is exactly one source file,
+this option names the object or assembly file, respectively.
+Otherwise, this option names the final executable
+file generated by the loader, and `a.out' (UNIX) or `a.exe' (Windows) is left undisturbed.
+.I lcc
+warns if
+.B \-o
+and
+.B \-c
+or
+.B \-S
+are given with more than one source file and ignores the
+.B \-o
+option.
+.TP
+.BI \-D name=def
+Define the
+.I name
+to the preprocessor, as if by `#define'.
+If
+.I =def
+is omitted, the name is defined as "1".
+.TP
+.BI \-U name
+Remove any initial definition of
+.IR name .
+.TP
+.BI \-I dir
+`#include' files
+whose names do not begin with `/' are always
+sought first in the directory of the
+.I file
+arguments, then in directories named in
+.B \-I
+options, then in directories on a standard list.
+.TP
+.B \-N
+Do not search
+.I any
+of the standard directories for `#include' files.
+Only those directories specified by subsequent explicit
+.B \-I
+options will be searched, in the order given.
+.TP
+.BI \-B str
+Use the compiler
+.BI "" str rcc
+instead of the default version.
+Note that
+.I str
+often requires a trailing slash.
+On Sparcs only,
+.B \-Bstatic
+and
+.BI \-Bdynamic
+are passed to the loader; see
+.IR ld (1).
+.TP
+.BI \-Wo\-lccdir= dir
+Find the preprocessor, compiler proper, and include directory
+in the directory
+.I dir/
+or
+.I
+dir\\.
+If the environment variable
+.B LCCDIR
+is defined, it gives this directory.
+.I lcc
+warns when this option is unsupported.
+.TP
+.B \-Wf-unsigned_char=1
+.br
+.ns
+.TP
+.B \-Wf-unsigned_char=0
+makes plain
+.B char
+an unsigned (1) or signed (0) type; by default,
+.B char
+is signed.
+.TP
+.B \-Wf\-wchar_t=unsigned_char
+.br
+.ns
+.TP
+.B \-Wf\-wchar_t=unsigned_short
+.br
+.ns
+.TP
+.B \-Wf\-wchar_t=unsigned_int
+Makes wide characters the type indicated; by default,
+wide characters are unsigned short ints, and
+.B wchar_t
+is a typedef for unsigned short defined in stddef.h.
+The definition for
+.B wchar_t
+in stddef.h must correspond to the type specified.
+.TP
+.B \-v
+Print commands as they are executed; some of the executed
+programs are directed to print their version numbers.
+More than one occurrence of
+.B \-v
+causes the commands to be printed, but
+.I not
+executed.
+.TP
+.BR \-help " or " \-?
+Print a message on the standard error summarizing
+.IR lcc 's
+options and giving the values of the environment variables
+.B LCCINPUTS
+and
+.BR LCCDIR ,
+if they are defined.
+Under Windows, the values of
+.B include
+and
+.B lib
+are also given, if they are defined.
+.TP
+.B \-b
+Produce code that counts the number of times each expression is executed.
+If loading takes place, arrange for a
+.B prof.out
+file to be written when the object program terminates.
+A listing annotated with execution counts can then be generated with
+.IR bprint (1).
+.I lcc
+warns when
+.B \-b
+is unsupported.
+.B \-Wf\-C
+is similar, but counts only the number of function calls.
+.TP
+.B \-p
+Produce code that counts the number of times each function is called.
+If loading takes place, replace the standard startup
+function by one that automatically calls
+.IR monitor (3)
+at the start and arranges to write a
+.B mon.out
+file when the object program terminates normally.
+An execution profile can then be generated with
+.IR prof (1).
+.I lcc
+warns when
+.B \-p
+is unsupported.
+.TP
+.B \-pg
+Causes the compiler to produce counting code like
+.BR \-p ,
+but invokes a run-time recording mechanism that keeps more
+extensive statistics and produces a
+.B gmon.out
+file at normal termination.
+Also, a profiling library is searched, in lieu of the standard C library.
+An execution profile can then be generated with
+.IR gprof (1).
+.I lcc
+warns when
+.B \-pg
+is unsupported.
+.TP
+.BI \-t name
+.br
+.ns
+.TP
+.BI \-t
+Produce code to print the name of the function, an activation number,
+and the name and value of each argument at function entry.
+At function exit, produce code to print
+the name of the function, the activation number, and the return value.
+By default,
+.I printf
+does the printing; if
+.I name
+appears, it does.
+For null
+.I char*
+values, "(null)" is printed.
+.BI \-target
+.I name
+is accepted, but ignored.
+.TP
+.BI \-tempdir= dir
+Store temporary files in the directory
+.I dir/
+or
+.I
+dir\\.
+The default is usually
+.BR /tmp .
+.TP
+.BI \-W xarg
+pass argument
+.I arg
+to the program indicated by
+.IR x ;
+.I x
+can be one of
+.BR p ,
+.BR f ,
+.BR a ,
+or
+.BR l ,
+which refer, respectively, to the preprocessor, the compiler proper,
+the assembler, and the loader.
+.I arg
+is passed as given; if a
+.B \-
+is expected, it must be given explicitly.
+.BI \-Wo arg
+specifies a system-specific option,
+.IR arg .
+.PP
+Other arguments
+are taken to be either loader option arguments, or C-compatible
+object programs, typically produced by an earlier
+.I lcc
+run, or perhaps libraries of C-compatible routines.
+Duplicate object files are ignored.
+These programs, together with the results of any
+compilations specified, are loaded (in the order
+given) to produce an executable program with name
+.BR a.out
+(UNIX) or
+.BR a.exe
+(Windows).
+.PP
+.I lcc
+assigns the most frequently referenced scalar parameters and
+locals to registers whenever possible.
+For each block,
+explicit register declarations are obeyed first;
+remaining registers are assigned to automatic locals if they
+are `referenced' at least 3 times.
+Each top-level occurrence of an identifier
+counts as 1 reference. Occurrences in a loop,
+either of the then/else arms of an if statement, or a case
+in a switch statement each count, respectively, as 10, 1/2, or 1/10 references.
+These values are adjusted accordingly for nested control structures.
+.B \-Wf\-a
+causes
+.I lcc
+to read a
+.B prof.out
+file from a previous execution and to use the data therein
+to compute reference counts (see
+.BR \-b ).
+.PP
+.I lcc
+is a cross compiler;
+.BI \-Wf\-target= target/os
+causes
+.I lcc
+to generate code for
+.I target
+running the operating system denoted by
+.IR os .
+The supported
+.I target/os
+combinations may include
+.PP
+.RS
+.ta \w'sparc/solarisxx'u
+.nf
+alpha/osf ALPHA, OSF 3.2
+mips/irix big-endian MIPS, IRIX 5.2
+mips/ultrix little-endian MIPS, ULTRIX 4.3
+sparc/solaris SPARC, Solaris 2.3
+x86/win32 x86, Windows NT 4.0/Windows 95/98
+x86/linux x86, Linux
+symbolic text rendition of the generated code
+null no output
+.fi
+.RE
+.PP
+For
+.BR \-Wf\-target=symbolic ,
+the option
+.B \-Wf-html
+causes the text rendition to be emitted as HTML.
+.B
+.SH LIMITATIONS
+.PP
+.I lcc
+accepts the C programming language
+as described in the ANSI standard.
+If
+.I lcc
+is used with the GNU C preprocessor, the
+.B \-Wp\-trigraphs
+option is required to enable trigraph sequences.
+.PP
+Plain int bit fields are signed.
+Bit fields are aligned like unsigned integers but are otherwise laid out
+as by most standard C compilers.
+Some compilers, such as the GNU C compiler,
+may choose other, incompatible layouts.
+.PP
+Likewise, calling conventions are intended to be compatible with
+the host C compiler,
+except possibly for passing and returning structures.
+Specifically,
+.I lcc
+passes and returns structures like host ANSI C compilers
+on most targets, but some older host C compilers use different conventions.
+Consequently, calls to/from such functions compiled with
+older C compilers may not work.
+Calling a function that returns
+a structure without declaring it as such violates
+the ANSI standard and may cause a fault.
+.SH FILES
+.PP
+The file names listed below are
+.IR typical ,
+but vary among installations; installation-dependent variants
+can be displayed by running
+.I lcc
+with the
+.B \-v
+option.
+.PP
+.RS
+.ta \w'$LCCDIR/liblcc.{a,lib}XX'u
+.nf
+file.{c,C} input file
+file.{s,asm} assembly-language file
+file.{o,obj} object file
+a.{out,exe} loaded output
+/tmp/lcc* temporary files
+$LCCDIR/cpp preprocessor
+$LCCDIR/rcc compiler
+$LCCDIR/liblcc.{a,lib} \fIlcc\fP-specific library
+/lib/crt0.o runtime startup (UNIX)
+/lib/[gm]crt0.o startups for profiling (UNIX)
+/lib/libc.a standard library (UNIX)
+$LCCDIR/include ANSI standard headers
+/usr/local/include local headers
+/usr/include traditional headers
+prof.out file produced for \fIbprint\fR(1)
+mon.out file produced for \fIprof\fR(1)
+gmon.out file produced for \fIgprof\fR(1)
+.fi
+.RE
+.PP
+.I lcc
+predefines the macro
+.B __LCC__
+on all systems.
+It may also predefine some installation-dependent symbols; option
+.B \-v
+exposes them.
+.SH "SEE ALSO"
+.PP
+C. W. Fraser and D. R. Hanson,
+.I A Retargetable C Compiler: Design and Implementation,
+Addison-Wesley, 1995. ISBN 0-8053-1670-1.
+.PP
+The World-Wide Web page at http://www.cs.princeton.edu/software/lcc/.
+.PP
+S. P. Harbison and G. L. Steele, Jr.,
+.I C: A Reference Manual,
+4th ed., Prentice-Hall, 1995.
+.PP
+B. W. Kernighan and D. M. Ritchie,
+.I The C Programming Language,
+2nd ed., Prentice-Hall, 1988.
+.PP
+American National Standards Inst.,
+.I American National Standard for Information Systems\(emProgramming
+.IR Language\(emC ,
+ANSI X3.159-1989, New York, 1990.
+.br
+.SH BUGS
+Mail bug reports along with the shortest preprocessed program
+that exposes them and the details reported by
+.IR lcc 's
+.B \-v
+option to lcc-bugs@princeton.edu. The WWW page at
+URL http://www.cs.princeton.edu/software/lcc/
+includes detailed instructions for reporting bugs.
+.PP
+The ANSI standard headers conform to the specifications in
+the Standard, which may be too restrictive for some applications,
+but necessary for portability.
+Functions given in the ANSI headers may be missing from
+some local C libraries (e.g., wide-character functions)
+or may not correspond exactly to the local versions;
+for example, the ANSI standard
+stdio.h
+specifies that
+.IR printf ,
+.IR fprintf ,
+and
+.I sprintf
+return the number of characters written to the file or array,
+but some existing libraries don't implement this convention.
+.PP
+On the MIPS and SPARC, old-style variadic functions must use
+varargs.h
+from MIPS or Sun. New-style is recommended.
+.PP
+With
+.BR \-b ,
+files compiled
+.I without
+.B \-b
+may cause
+.I bprint
+to print erroneous call graphs.
+For example, if
+.B f
+calls
+.B g
+calls
+.B h
+and
+.B f
+and
+.B h
+are compiled with
+.BR \-b ,
+but
+.B g
+is not,
+.B bprint
+will report that
+.B f
+called
+.BR h .
+The total number of calls is correct, however.
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