From 22f322884cf7715c01500ef0b4579b87b1cb1973 Mon Sep 17 00:00:00 2001 From: Tim Angus Date: Sat, 10 Dec 2005 03:19:05 +0000 Subject: * Copied ioq3 src to trunk --- src/tools/lcc/doc/4.html | 754 ++++++++++++++++++++++++++++++++++++++ src/tools/lcc/doc/bprint.1 | 83 +++++ src/tools/lcc/doc/bprint.pdf | Bin 0 -> 4963 bytes src/tools/lcc/doc/install.html | 796 +++++++++++++++++++++++++++++++++++++++++ src/tools/lcc/doc/lcc.1 | 605 +++++++++++++++++++++++++++++++ src/tools/lcc/doc/lcc.pdf | Bin 0 -> 16421 bytes 6 files changed, 2238 insertions(+) create mode 100644 src/tools/lcc/doc/4.html create mode 100644 src/tools/lcc/doc/bprint.1 create mode 100644 src/tools/lcc/doc/bprint.pdf create mode 100644 src/tools/lcc/doc/install.html create mode 100644 src/tools/lcc/doc/lcc.1 create mode 100644 src/tools/lcc/doc/lcc.pdf (limited to 'src/tools/lcc/doc') diff --git a/src/tools/lcc/doc/4.html b/src/tools/lcc/doc/4.html new file mode 100644 index 00000000..a2e1213f --- /dev/null +++ b/src/tools/lcc/doc/4.html @@ -0,0 +1,754 @@ + + + + + +The lcc 4.1 Code-Generation Interface + + + + +

The lcc 4.1 Code-Generation Interface

+ +

Christopher +W. Fraser and David R. Hanson, Microsoft Research

+ +

+ + +

+ + +

Introduction

+ +

Version 4.1 is the latest release of lcc, the ANSI C compiler described in +our book A Retargetable C Compiler: Design and Implementation +(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 A +Retargetable C Compiler.

+ +

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 A Retargetable +C Compiler). 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.

+ +

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: + +

The number of type suffixes has been reduced to 6.
Dag operators are composed of a generic operator, a type suffix, and a size.
Unsigned variants of several operators have been added.
Several interface functions have new signatures.

+ +

In addition, version 4.x is written in ANSI C and uses the standard I/O library and +other standard C functions.

+ +

The sections below parallel the subsections of Chap. 5 of A Retargetable C +Compiler and summarize the differences between the 3.x and 4.x code-generation +interface. Unaffected subsections are omitted. Page citations refer to pages in A +Retargetable C Compiler.

+ +

5.1 Type Metrics

+ +

There are now 10 metrics in an interface record:

+ +

Metrics charmetric;
+Metrics shortmetric;
+Metrics intmetric;
+Metrics longmetric;
+Metrics longlongmetric;
+Metrics floatmetric;
+Metrics doublemetric;
+Metrics longdoublemetric;
+Metrics ptrmetric;
+Metrics structmetric;

+ +

Each of these specifies the size and alignment of the corresponding type. ptrmetric +describes all pointers.

+ +

5.3 Symbols

+ +

The actual value of a constant is stored in the u.c.v field of a symbol, +which holds a Value:

+ +

typedef union value {
+	long i;
+	unsigned long u;
+	long double d;
+	void *p;
+	void (*g)(void);
+} Value;

+ +

The value is stored in the appropriate field according to its type, which is given by +the symbol's type field.

+ +

5.5 Dag Operators

+ +

The op field a of node structure holds a dag operator, which +consists of a generic operator, a type suffix, and a size indicator. The type suffixes +are:

+ +

enum {
+	F=FLOAT,
+	I=INT,
+	U=UNSIGNED,
+	P=POINTER,
+	V=VOID,
+	B=STRUCT
+};
+
+#define sizeop(n) ((n)<<10)

+ +

Given a generic operator o, a type suffix t, and a size s, +a type- and size-specific operator is formed by o+t+sizeop(s). For example, ADD+F+sizeop(4) +forms the operator ADDF4, which denotes the sum of two 4-byte floats. +Similarly, ADD+F+sizeop(8) forms ADDF8, which denotes 8-byte +floating addition. In the 3.x code-generation interface, ADDF and ADDD +denoted these operations. There was no size indicator in the 3.x operators because the +type suffix supplied both a type and a size.

+ +

Table 5.1 lists each generic operator, its valid type suffixes, and the number of kids +and syms that it uses; multiple values for kids indicate +type-specific variants. The notations in the syms column give the number +of syms values and a one-letter code that suggests their uses: 1V indicates +that syms[0] points to a symbol for a variable, 1C indicates that syms[0] +is a constant, and 1L indicates that syms[0] is a label. For 1S, syms[0] +is a constant whose value is a size in bytes; 2S adds syms[1], 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.

+ + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + +

Table 5.1Node Operators.
syms	kids	Operator	Type Suffixes	Sizes	Operation
1V	0	`ADDRF`	`...P..`	p	address of a parameter
1V	0	`ADDRG`	`...P..`	p	address of a global
1V	0	`ADDRL`	`...P..`	p	address of a local
1C	0	`CNST`	`FIUP..`	fdx csilh p	constant

	1	`BCOM`	`.IU...`	ilh	bitwise complement
1S	1	`CVF`	`FI....`	fdx ilh	convert from float
1S	1	`CVI`	`FIU...`	fdx csilh csilhp	convert from signed integer
1S	1	`CVP`	`..U..`	p	convert from pointer
1S	1	`CVU`	`.IUP..`	csilh p	convert from unsigned integer
	1	`INDIR`	`FIUP.B`	fdx csilh p	fetch
	1	`NEG`	`FI....`	fdx ilh	negation

	2	`ADD`	`FIUP..`	fdx ilh ilhp p	addition
	2	`BAND`	`.IU...`	ilh	bitwise AND
	2	`BOR`	`.IU...`	ilh	bitwise inclusive OR
	2	`BXOR`	`.IU...`	ilh	bitwise exclusive OR
	2	`DIV`	`FIU...`	fdx ilh	division
	2	`LSH`	`.IU...`	ilh	left shift
	2	`MOD`	`.IU...`	ilh	modulus
	2	`MUL`	`FIU...`	fdx ilh	multiplication
	2	`RSH`	`.IU...`	ilh	right shift
	2	`SUB`	`FIUP..`	fdx ilh ilhp p	subtraction

2S	2	`ASGN`	`FIUP.B`	fdx csilh p	assignment
1L	2	`EQ`	`FIU...`	fdx ilh ilhp	jump if equal
1L	2	`GE`	`FIU...`	fdx ilh ilhp	jump if greater than or equal
1L	2	`GT`	`FIU...`	fdx ilh ilhp	jump if greater than
1L	2	`LE`	`FIU...`	fdx ilh ilhp	jump if less than or equal
1L	2	`LT`	`FIU...`	fdx ilh ilhp	jump if less than
1L	2	`NE`	`FIU...`	fdx ilh ilhp	jump if not equal

2S	1	`ARG`	`FIUP.B`	fdx ilh p	argument
1	1 or 2	`CALL`	`FIUPVB`	fdx ilh p	function call
	1	`RET`	`FIUPV.`	fdx ilh p	return from function

	1	`JUMP`	`....V.`		unconditional jump
1L	0	`LABEL`	`....V.`		label definition

+ +

The entries in the Sizes 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), "long +long" 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.

+ +

The actual values for the size indicators, fdxcsilhp, depend on the target. A +specification like ADDFf denotes the operator ADD+F+sizeop(f), +where "f" is replaced by a target-dependent value, e.g., ADDF4 and ADDF8. +For example, back ends must implement the following CVI and MUL +operators.

+ +

+
CVIFf CVIFd CVIFx
+ CVIIc CVIIs CVIIi CVIIl CVIIh
+ CVIUc CVIUs CVIUi CVIUl CVIUh + CVIUp
+
+ MULFf MULFd MULFx
+ MULIi MULIl MULIh
+ MULUi MULUl MULUh
+

+ +

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 "long long" 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 CVI and MUL +operators.

+ +

+
CVIF4 CVIF8
+ CVII1 CVII2 CVII4
+ CVIU1 CVIU2 CVIU4
+
+ MULF4 MULF8
+ MULI4
+ MULU4
+

+ +

The set of operators is thus target-dependent; for example, ADDI8 appears +only if the target supports an 8-byte integer type. ops.c is +a program that, given a set of sizes, prints the required operators and their values, +e.g.,

+ +

% ops c=1 s=2 i=4 l=4 h=4 f=4 d=8 x=8 p=4
+...
+ 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

+ +

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, CVUI4 converts an +unsigned (U) to a 4-byte signed integer (I4). The syms[0] +field points to a symbol-table entry for a integer constant that gives the size of the +source operand. For example, if syms[0] in a CVUI4 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.

+ +

The front end composes conversions between types T₁ and T₂ +by widening T₁ to it's "supertype", if necessary, converting +that result to T₂'s supertype, then narrowing the result to T₂, +if necessary. The following table lists the supertypes; omitted entries are their own +supertypes.

+ +

+ + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + +
Type Supertype
signed char int
signed short int
unsigned char int, if sizeof (char) < sizeof (int)
+ unsigned, otherwise
unsigned short int, if sizeof (short) < sizeof (int)
+ unsigned, otherwise
void * an unsigned type as large as a pointer
+

+ +

Pointers are converted to an unsigned type of the same size, even when that type is not +one of the integer types.

+ +

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 CVUIi +conversion, when shorts are smaller than ints.

+ +

There are now signed and unsigned variants of ASGN, INDIR, BCOM, +BOR, BXOR, BAND, ARG, CALL, +and RET 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 ASGN, INDIR, ARG, CALL, +and RET.

+ +

5.6 Interface Flags

+ +

unsigned unsigned_char:1;

+ +

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.

+ +

All the interface flags can be set by command-line options, e.g., -Wf-unsigned_char=1 +causes plain characters to be unsigned.

+ +

5.8 Definitions

+ +

The front end announces local variables by calling

+ +

void (*local)(Symbol);

+ +

It announces temporaries likewise; these have the symbol's temporary flag +set, which indicates that the symbol will be used only in the next call to gen. +If a temporary's u.t.cse field is nonnull, it points to the node that +computes the value assigned to the temporary; see page 346.

+ +

The front end calls

+ +

void (*address)(Symbol p, Symbol q, long n);

+ +

to initialize q to a symbol that represents an address of the form x+n, +where x is the address represented by p and the long integer n +is positive or negative.

+ +

5.9 Constants

+ +

The interface function

+ +

void (*defconst)(int suffix, int size, Value v);

+ +

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.

+ +

+ + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + +
suffix v Field size
F v.d float, double, long double
I v.i signed char, signed short, signed int, signed long
U v.u unsigned char, unsigned short, unsigned int, unsigned long
P v.p void *
+

+ +

defconst must narrow v.x when size is less than sizeof +v.x; e.g., to emit an unsigned char, defconst should emit (unsigned +char)v.i.

+ +

5.12 Upcalls

+ +

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 freopen to redirect these +streams to explicit files, when necessary.

+ +

bp, outflush, and outs have been eliminated.

+ +

extern void fprint(FILE *f, const char *fmt, ...);
+extern void  print(const char *fmt, ...);

+ +

print formatted data to file f (fprint) or the standard +output (print). These functions are like standard C's printf and +fprintf, 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.

+ +

+ + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + +
Specifiers Corresponding printf Specifiers
%c %c
%d %D %d %ld
%u %U %u %lu
%x %X %x %lx
%f %e %g %e %f %g
%p Converts the corresponding void * argument to unsigned long and prints it with the printf + %#x specifier or just %x when the argument is null.
%I Prints the number of spaces given by the corresponding argument.
+

+ +

#define generic(op)  ((op)&0x3F0)
+#define specific(op) ((op)&0x3FF)

+ +

generic(op) returns the generic variant of op; that is, +without its type suffix and size indicator. specific(op) returns the +type-specific variant of op; that is, without its size indicator.

+ +

newconst has been replaced by

+ +

extern Symbol intconst(int n);

+ +

which installs the integer constant n in the symbol table, if necessary, +and returns a pointer to the symbol-table entry.

+ +

+ Chris Fraser / cwfraser@microsoft.com
+ David Hanson / drh@microsoft.com
+ $Revision: 145 $ $Date: 2001-10-17 16:53:10 -0500 (Wed, 17 Oct 2001) $ +

+ + diff --git a/src/tools/lcc/doc/bprint.1 b/src/tools/lcc/doc/bprint.1 new file mode 100644 index 00000000..8cf99714 --- /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 00000000..1b119636 Binary files /dev/null and b/src/tools/lcc/doc/bprint.pdf differ diff --git a/src/tools/lcc/doc/install.html b/src/tools/lcc/doc/install.html new file mode 100644 index 00000000..3cc59a8f --- /dev/null +++ b/src/tools/lcc/doc/install.html @@ -0,0 +1,796 @@ + + + + + +Installing lcc + + + + +

Installing lcc

+ +

Christopher +W. Fraser and David R. Hanson, Microsoft Research

+ +

+ + +

Introduction

Installation on UNIX

Building the Driver

Building the Compiler and Accessories

Installation on Windows NT 4.0 and Windows 95/98

Reporting Bugs

Keeping in Touch

+ + +

Introduction

+ +

lcc is the ANSI C compiler +described in our book A Retargetable C Compiler: Design and Implementation +(Addison-Wesley, 1995, ISBN 0-8053-1670-1).

+ +

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 use lcc, you can run the InstallShield executable, +which installs the binaries and the documentation. If you want to modify lcc or rebuild +it from the source files, you need the complete distribution, and +you should read the rest of the section, the following three sections, and the Windows NT/95/98 section.

+ +

Extract the distribution into its own directory. All non-absolute paths below are +relative to this directory. The distribution holds the following subdirectories.

+ +

+ + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + +
src source code
etc driver, accessories
lib runtime library source code
cpp preprocessor source code
lburg code-generator generator source code
doc this document, man pages
include/*/* include files
tst test suite
alpha/*/tst ALPHA test outputs
mips/*/tst MIPS test outputs
sparc/*/tst SPARC test outputs
x86/*/tst X86 test outputs
+

+ +

doc/install.html is the HTML file for this document. doc/4.html +describes the internal differences between lcc 3.x and 4.1.

+ +

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. You will need an existing ANSI/ISO C +compiler to build and install lcc.

+ +

Installation on UNIX

+ +

The compilation components (the preprocessor, include files, and compiler proper, etc.) +are installed in a single build directory. 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,

+ +

% ln -s /usr/local/lib/lcc-4.1/sparc-solaris /usr/local/lib/lcc

+ +

points /usr/local/lib/lcc to a build directory for lcc version 4.1 on the +SPARC under Solaris. Links into /usr/local/lib are created for the programs lcc +and bprint. 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, lcc, can be used unmodified.

+ +

Installation on a UNIX system involves the following steps. Below, the build directory +is referred to as BUILDDIR. + +

Create the build directory, using a version- and platform-specific naming convention as + suggested above, and record the name of this directory in the BUILDDIR + environment variable:
+
```
% setenv BUILDDIR /usr/local/lib/lcc-4.1/sparc-solaris
+% mkdir -p $BUILDDIR
```
+
+
Here and below, commands assume the C shell. Also, you'll need a version of mkdir + that supports the -p option, which creates intermediate directories as + necessary.
+
Copy the man pages to the repository for local man pages, e.g.,
+
```
% cp doc/*.1 /usr/local/man/man1
```
+
+
Some users copy the man pages to the build directory and create the appropriate + symbolic links, e.g.,
+
+
```
% cp doc/*.1 $BUILDDIR
+% ln -s $BUILDDIR/*.1 /usr/local/man/man1
```
+
+
Platform-specific include files are in directories named include/target/os. + Create the include directory in the build directory, and copy the include hierarchy for + your platform to this directory, e.g.,
+
```
% mkdir $BUILDDIR/include
+% cp -p -R include/sparc/solaris/* $BUILDDIR/include
```
+
+
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 /proj/pkg/lcc, so the included files are + "installed" by creating one symbolic link:
+
+
```
% ln -s /proj/pkg/lcc/4.1/include/sparc/solaris $BUILDDIR/include
```
+
+
If you're installing lcc on Linux, you must also plant a symbolic link named gcc + to gcc's library directory, because lcc uses gcc's C preprocessor and most of gcc's header + files:
+
+
```
% ln -s /usr/lib/gcc-lib/i486-linux/2.7.2.2 $BUILDDIR/gcc
```
+
+
The library directory shown above may be different on your Linux machine; to determine + the correct directory, browse /usr/lib/gcc-lib, or execute
+
+
```
% cc -v tst/8q.c
```
+
+
and examine the diagnostic output. Make sure that $BUILDDIR/gcc/cpp and $BUILDDIR/gcc/include + point to, respectively, gcc's C preprocessor and header files. On Linux, lcc looks for + include files in $BUILDDIR/include, $BUILDDIR/gcc/include, and /usr/include, + in that order; see Building the Driver and etc/linux.c for details.
+
The makefile includes the file named by the CUSTOM + macro; the default is custom.mk, and an empty custom.mk is + included in the distribution. If desired, prepare a site-specification customization file + and define CUSTOM to the path of that file when invoking make in steps 5 and + 6, e.g.,
+
```
make CUSTOM=/users/drh/solaris.mk
```
+
+
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.
+
Build the host-specific driver, creating a custom host-specific part, if necessary. See Building the Driver.
Build the preprocessor, compiler proper, library, and other accessories. See Building the Compiler.
Plant symbolic links to the build directory and to the installed programs, e.g.,
+
```
% ln -s $BUILDDIR /usr/local/lib/lcc
+% ln -s /usr/local/lib/{lcc,bprint} /usr/local/bin
```
+
+
Some users copy bprint and lcc into /usr/local/bin + instead of creating symbolic links. The advantange of creating the links for lcc + and bprint as shown is that, once established, they point indirectly to + whatever /usr/local/lib/lcc points to; installing a new version of lcc, say, + 4.2, can be done by changing /usr/local/lib/lcc to point to the 4.2 build + directory.
+

+ +

Building the Driver

+ +

The preprocessor, compiler, assembler, and loader are invoked by a driver program, lcc, +which is similar to cc on most systems. It's described in the man page doc/lcc.1. +The driver is built by combining the host-independent part, etc/lcc.c, +with a small host-specific part. Distributed host-specific parts are named etc/os.c, +where os is the name of the operating system for the host on which lcc +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 whatever.c, and edit it +as described below. You should not have to edit etc/lcc.c.

+ +

We'll use etc/solaris.c 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 BUILDDIR set correctly, +and build the driver with a make command, e.g.,

+ +

% make HOSTFILE=etc/solaris.c lcc
+cc -g -c -DTEMPDIR=\"/tmp\" -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

+ +

The symbolic name HOSTFILE specifies the path to the host-specific part, +either one in the distribution or whatever.c. Some versions of make +may require the -e option in order to read the environment.

+ +

Here's etc/solaris.c:

+ +

/* Sparcs running Solaris 2.5.1 at CS Dept., Princeton University */
+
+#include <string.h>
+
+static char rcsid[] = "$ Id: solaris.c,v 1.10 1998/09/14 20:36:33 drh Exp $";
+
+#ifndef LCCDIR
+#define LCCDIR "/usr/local/lib/lcc/"
+#endif
+#ifndef SUNDIR
+#define SUNDIR "/opt/SUNWspro/SC4.2/lib/"
+#endif
+
+char *suffixes[] = { ".c", ".i", ".s", ".o", ".out", 0 };
+char inputs[256] = "";
+char *cpp[] = { LCCDIR "cpp",
+	"-D__STDC__=1", "-Dsparc", "-D__sparc__", "-Dsun", "-D__sun__", "-Dunix",
+	"$1", "$2", "$3", 0 };
+char *include[] = { "-I" LCCDIR "include", "-I/usr/local/include",
+	"-I/usr/include", 0 };
+char *com[] = { LCCDIR "rcc", "-target=sparc/solaris",
+	"$1", "$2", "$3", 0 };
+char *as[] = { "/usr/ccs/bin/as", "-Qy", "-s", "-o", "$3", "$1", "$2", 0 };
+char *ld[] = { "/usr/ccs/bin/ld", "-o", "$3", "$1",
+	SUNDIR "crti.o", SUNDIR "crt1.o",
+	SUNDIR "values-xa.o", "$2", "",
+	"-Y", "P," SUNDIR ":/usr/ccs/lib:/usr/lib", "-Qy",
+	"-L" LCCDIR, "-llcc", "-lm", "-lc", SUNDIR "crtn.o", 0 };
+
+extern char *concat(char *, char *);
+
+int option(char *arg) {
+	if (strncmp(arg, "-lccdir=", 8) == 0) {
+		cpp[0] = concat(&arg[8], "/cpp");
+		include[0] = concat("-I", concat(&arg[8], "/include"));
+		ld[12] = concat("-L", &arg[8]);
+		com[0] = concat(&arg[8], "/rcc");
+	} else if (strcmp(arg, "-p") == 0) {
+		ld[5] = SUNDIR "mcrt1.o";
+		ld[10] = "P," SUNDIR "libp:/usr/ccs/lib/libp:/usr/lib/libp:"
+			 SUNDIR ":/usr/ccs/lib:/usr/lib";
+	} else if (strcmp(arg, "-b") == 0)
+		;
+	else if (strncmp(arg, "-ld=", 4) == 0)
+		ld[0] = &arg[4];
+	else
+		return 0;
+	return 1;
+}

+ +

LCCDIR defaults to "/usr/local/lib/lcc/" unless +it's defined by a -D option as part of CFLAGS in the make +command, e.g.,

+ +

% make HOSTFILE=etc/solaris.c CFLAGS='-DLCCDIR=\"/v/lib/lcc/\"' lcc

+ +

Note the trailing slash; SUNDIR is provided so you can use etc/solaris.c +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 etc/gcc-solaris.c.

+ +

Most of the host-specific code is platform-specific data and templates for the commands +that invoke the preprocessor, compiler, assembler, and loader. The suffixes +array lists the file name suffixes for C source files, preprocessed source files, assembly +language source files, object files, and executable files. suffixes must be +terminated with a null pointer, as shown above. The initialization of suffixes +in etc/solaris.c are the typical ones for UNIX +systems. Each element of suffixes is actually a list of suffixes, separated +by semicolons; etc/win32.c holds an example:

+ +

char *suffixes[] = { ".c;.C", ".i;.I", ".asm;.ASM;.s;.S", ".obj;.OBJ", ".exe", 0 };

+ +

When a list is given, the first suffix is used whenever lcc needs to generate a file +name. For example, with etc/win32.c, lcc emits +the generated assembly code into .asm files.

+ +

The inputs array holds a null-terminated string of directories separated +by colons or semicolons. These are used as the default value of LCCINPUTS, if +the environment variable LCCINPUTS is not set; see the man +page.

+ +

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.

+ +

The cpp array gives the command for running lcc's preprocessor, cpp. +Literal arguments specified in templates, e.g., "-Dsparc" in the cpp +command above, are passed to the command as given.

+ +

The strings "$1", "$2", and "$3" +in templates are placeholders for lists of arguments that are substituted in a +copy of the template before the command is executed. $1 is replaced by the options +specified by the user; for the preprocessor, this list always contains at least -D__LCC__. +$2 is replaced by the input files, and $3 is replaced +by the output file.

+ +

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, "$3" becomes "", which is removed from +the final argument list.

+ +

The include array is a list of -I 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 UNIX or Windows +installation instructions. The driver adds these options to cpp's arguments +when it invokes the preprocessor, except when -N is specified.

+ +

com gives the command for invoking the compiler. This template can appear +as shown above in a custom host-specific part, but the option -target=sparc/solaris +should be edited to the target/os for your platform. If com[1] +includes the string "win32", the driver assumes it's running on +Windows. lcc can generate code for all of the target/os +combinations listed in the file src/bind.c. The -target option +specifies the default combination. The driver's -Wf option can be used to +specify other combinations; the man page elaborates.

+ +

as 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.

+ +

ld gives the command for invoking the loader. For the other commands, the +list $2 contains a single file; for ld, $2 contains +all ".o" files and libraries, and $3 is a.out, unless +the -o option is specified. As suggested in the code above, ld +must also specify the appropriate startup code and default libraries, including the lcc +library, liblcc.a.

+ +

The option function is described below; the minimal option +function just returns 0.

+ +

You can test lcc with the options -v -v to display the +commands that would be executed, e.g.,

+ +

% $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

+ +

As the output shows, lcc places temporary files in /tmp; if +any of the environment variables TMP, TEMP, and TMPDIR +are set, they override this default (in the order shown) as does the -tempdir=dir +option. The default can be changed by defining TEMPDIR in CFLAGS +when building the driver.

+ +

The option function is called for the options -Wo, -g, +-p, -pg, and -b because these compiler options +might also affect the loader's arguments. For these options, the driver calls option(arg) +to give the host-specific code an opportunity to edit the ld command, if +necessary. option can change ld, if necessary, and return 1 to +announce its acceptance of the option. If the option is unsupported, option +should return 0.

+ +

For example, in response to -g, the option function shown +above accepts the option but does nothing else, because the ld and as +commands don't need to be modified on the SPARC. -g will also be added to the +compiler's options by the host-independent part of the driver. The -p causes option +to change the name of the startup code and changed the list of libraries. The -b +option turns on lcc's per-expression profiling, the code for which is in liblcc.a, +so option need no nothing.

+ +

On SPARCs, the driver also recognizes -Bstatic and -Bdynamic +as linker options. The driver recognizes but ignores "-target name" +option.

+ +

The option -Woarg causes the driver to pass arg to option. +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 -Wo-lccdir=dir option, which +causes lcc's compilation components to be found in dir, because this option is +used by the test scripts, and because the driver simulates a -Wo-lccdir +option with the value of the environment variable LCCDIR, if it's defined. +The code above rebuilds the paths to the include files, preprocessor, compiler, and +library by calling concat, which is defined in etc/lcc.c.

+ +

Building the Compiler and Accessories

+ +

To build the rest of compilation components make sure BUILDDIR is set +appropriately and type "make all". This command builds librcc.a +(the compiler's private library), rcc (the compiler proper), lburg +(the code-generator generator), cpp (the preprocessor), liblcc.a +(the runtime library), and bprint (the profile printer), all in BUILDDIR. +There may be warnings, but there should be no errors. If you're using an ANSI/ISO compiler +other than cc, specify its name with the CC= option, e.g., +"make CC=gcc all". If you're running on a DEC ALPHA, use "make +CC='cc -std1' all"; the -std1 option is essential on the ALPHA. +If you're on a DEC 5000 running Ultrix 4.3, use "make CC=c89 all".

+ +

Once rcc is built with the host C compiler, run the test suite to verify +that rcc is working correctly. If any of the steps below fail, contact us +(see Reporting Bugs). The commands in the makefile run the +shell script src/run.sh on each C program in the test suite, tst/*.c. +It uses the driver, $BUILDDIR/lcc, so you must have the driver in the build +directory before testing rcc. The target/os +combination is read from the variable TARGET, which must be specified when +invoking make:

+ +

% 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:

+ +

Each line in the output above is of the form

+ +

+
$BUILDDIR/rcc -target=target/os$BUILDDIR/target/os/X.s:
+

+ +

where X is the base name of the C program X.c in the +test suite. This output identifies the compiler and the target, e.g., "$BUILDDIR/rcc +is generating code for a sparc running the solaris operating +system."

+ +

For each program in the test suite, src/run.sh compiles the program, drops +the generated assembly language code in BUILDDIR/target/os, +and uses diff to compare the generated assembly code with the expected code +(the code expected for tst/8q.c on the SPARC under Solaris is in sparc/solaris/tst/8q.sbk, +etc.). If there are differences, the script executes the generated code with the input +given in tst (the input for tst/8q.c is in tst/8q.0, +etc.) and compares the output with the expected output (the expected output from tst/8q.c +on the SPARC under Solaris is in sparc/solaris/tst/8q.1bk, etc.). The script +also compares the diagnostics from the compiler with the expected diagnostics.

+ +

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.

+ +

Next, run the "triple test", which builds rcc using itself:

+ +

% 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

+ +

This command builds rcc twice; once using the rcc built by cc +and again using the rcc built by lcc. 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; contact us.

+ +

The final version of rcc should also pass the test suite; that is, the +output from

+ +

% make TARGET=sparc/solaris test

+ +

should be identical to that from the previous make test.

+ +

The command "make clean" cleans up, but does not remove rcc, +etc., and "make clobber" cleans up and removes lcc, rcc, +and the other accessories. Test directories under BUILDDIR are not +removed; you'll need to remove these by hand, e.g.,

+ +

% rm -fr $BUILDDIR/sparc

+ +

The code generators for the other targets can be tested by specifying the desired target/os +and setting an environment variable that controls what src/run.sh does. For +example, to test the MIPS code generator, type

+ +

% setenv REMOTEHOST noexecute
+% make TARGET=mips/irix test

+ +

As above, src/run.sh compares the MIPS code generated with what's +expected. There should be no differences. Setting REMOTEHOST to noexecute +suppresses the assembly and execution of the generated code. If you set REMOTEHOST +to the name of a MIPS machine to which you can rlogin, src/run.sh +will rcp the generated code to that machine and execute it there, if +necessary. See src/run.sh for the details.

+ +

You can use lcc as a cross compiler. The options -S and -Wf-target=target/os +generate assembly code for the specified target, which is any of those listed in the file src/bind.c. +For example,

+ +

% lcc -Wf-target=mips/irix -S tst/8q.c

+ +

generates MIPS code for tst/8q.c in 8q.s.

+ +

lcc can also generate code for a "symbolic" 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 -Wf-target=symbolic. +For example,

+ +

% lcc -Wf-target=symbolic -S tst/8q.c

+ +

generates symbolic output for tst/8q.c in 8q.s. Adding -Wf-html +causes the symbolic target to emit HTML instead of plain text. Finally, the option -Wf-target=null +specifies the "null" target for which lcc emits nothing and thus only checks the +syntax and semantics of its input files.

+ +

Installation on Windows NT 4.0 or Windows 95/98

+ +

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 upgrade to 6.11d, +because earlier 6.11 releases do not generate correct COFF object files.

+ +

Building the distribution components from the ground up requires Microsoft's Visual +C/C++ 5.0 compiler, Microsoft's make, nmake, and the standard Windows command +interpreter. makefile.nt is written to use only nmake. +As on UNIX systems, the compilation components are installed in a single build +directory, and the top-level programs, lcc.exe and bprint.exe, +are installed in a directory on the PATH. If the conventions used below are followed, the +Windows-specific parts of the driver program, lcc.exe, can be used +unmodified.

+ +

Building from the source distribution on a Windows system involves the following steps. +Below, the build directory is referred to as BUILDDIR, and the distribution +is in \dist\lcc\4.1. + +

Create the build directory, perhaps using a version- and platform-specific naming + convention as suggested in Installation on UNIX, and record + the name of this directory in the BUILDDIR environment variable:
+
```
C:\dist\lcc\4.1>set BUILDDIR=\progra~1\lcc\4.1\bin
+C:\dist\lcc\4.1>mkdir %BUILDDIR%
```
+
+
The default build, or installation, directory is \Program Files\lcc\4.1\bin, + but the nmake commands require that you use the corresponding 8.3 file name, progra~1, + instead of Program Files.
+
etc\win32.c is the Windows-specific part of + the driver. It assumes that environment variable include gives the locations + of the VC header files and that the linker (link.exe) and the assembler (ml.exe) + are on the PATH. It also assumes that the macro LCCDIR gives the build + directory. If necessary, revise a copy of etc\win32.c + to reflect the conventions on your computer (see Building the Driver), + then build the driver, specifying the default temporary directory, if necessary:
+
```
C:\dist\lcc\4.1>nmake -f makefile.nt TEMPDIR=\\temp HOSTFILE=etc/win32.c lcc
+...
+        cl -nologo -Zi -MLd -Fd\progra~1\lcc\4.1\bin\ -c -DTEMPDIR=\"\\temp\" -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
```
+
+
If you make a copy of etc\win32.c, specify the path of the copy as the + value of HOSTFILE. For example, if you copy etc\win32.c to BUILDDIR + and edit it, use the command
+
+
```
C:\dist\lcc\4.1>nmake -f makefile.nt TEMPDIR=\\temp HOSTFILE=%BUILDDIR%\win32.c lcc
```
+
+
Build the preprocessor, compiler proper, library, and other accessories (see Building the Compiler):
+
```
C:\dist\lcc\4.1>nmake -f makefile.nt all
```
+
+
This command uses the VC command-line tools cl and lib to + build bprint.exe, cpp.exe, lburg.exe, liblcc.lib, + librcc.lib, and rcc.exe, all in BUILDDIR. There may + be some warnings, but there should be no warnings.
+
Create a test directory and run the test suite:
+
```
C:\dist\lcc\4.1>mkdir %BUILDDIR%\x86\win32\tst
+C:\dist\lcc\4.1>nmake -f makefile.nt test
```
+
+
This command compiles each program in tst, 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 fc). For + example, when the nmake command compiles tst\8q.c, + it leaves the generated assembly code and diagnostic output in %BUILDDIR%\x86\win32\tst\8q.s + and %BUILDDIR%\x86\win32\tst\8q.2, and it compares them with the expected + results in x86\win32\tst\8q.sbk. It builds the executable program in %BUILDDIR%\x86\win32\tst\8q.exe, + runs it, and redirects the output to %BUILDDIR%\x86\win32\tst\8q.1, which it + compares with x86\win32\tst\8q.1bk. The output from this step is voluminous, + but there should be no differences and no errors.
+
Run the "triple" test, which compiles rcc with itself and + verifies the results:
+
```
C:\dist\lcc\4.1>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
```
+
+
This command builds rcc twice; once using the rcc built by VC + and again using the rcc built by lcc. The resulting binaries are + compared using fc. 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; contact us.
+

Copy lcc.exe and bprint.exe to a directory on your PATH, e.g.,

C:\dist\lcc\4.1>copy %BUILDDIR%\lcc.exe \bin
+        1 file(s) copied.
+
+C:\dist\lcc\4.1>copy %BUILDDIR%\bprint.exe \bin
+        1 file(s) copied.

Finally, clean up:
+
```
C:\dist\lcc\4.1>nmake -f makefile.nt clean
```
+
+
This command removes the derived files in BUILDDIR, but does not remove rcc.exe, + etc.; "nmake -f makefile.nt clobber" cleans up and removes all + executables and libraries. Test directories under BUILDDIR are not + removed; you'll need to remove these by hand, e.g.,
+
+
```
C:\dist\lcc\4.1>rmdir %BUILDDIR%\x86 /s
+\progra~1\lcc\4.1\bin\x86, Are you sure (Y/N)? y
```
+
+

+ +

Reporting Bugs

+ +

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 A Retargetable C Compiler: Design and Implementation. + +

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.
Preprocess the source file and capture the preprocessor output. Discard the original + code.
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.
Confirm that the source file displays the error with the distributed 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.
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 The C Programming Language, or the + appropriate section in C: A Reference Manual, 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.
Confirm that your error hasn't been fixed already. The latest version of lcc is always + available for anonymous ftp from ftp.cs.princeton.edu in pub/lcc. A README file there gives + acquistion details, and the LOG 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.
Send your program by electronic mail to lcc-bugs@cs.princeton.edu. Please + send only valid C programs; put all remarks in C comments so that we can process reports + semiautomatically.

+ +

Keeping in Touch

+ +

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

+ +

subscribe lcc

+ +

to majordomo@cs.princeton.edu. This line must appear in the message body; +"Subject:" lines are ignored. To learn more about mailing lists served by majordomo, +send a message with the 1-word body "help" to majordomo@cs.princeton.edu. +Mail sent to lcc@cs.princeton.edu is forwarded to everyone on the mailing +list.

+ +

There is also an lcc-bugs mailing list for reporting bugs; subscribe to it +by sending a message with the 1-line body

+ +

subscribe lcc-bugs

+ +

to majordomo@cs.princeton.edu. Mail addressed to lcc-bugs@cs.princeton.edu +is forwarded to everyone on this list.

+ +

+ Chris Fraser / cwfraser@microsoft.com
+ David Hanson / drh@microsoft.com
+ $Revision: 145 $ $Date: 2001-10-17 16:53:10 -0500 (Wed, 17 Oct 2001) $ +

+ + diff --git a/src/tools/lcc/doc/lcc.1 b/src/tools/lcc/doc/lcc.1 new file mode 100644 index 00000000..fe91bca9 --- /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. diff --git a/src/tools/lcc/doc/lcc.pdf b/src/tools/lcc/doc/lcc.pdf new file mode 100644 index 00000000..6134de6b Binary files /dev/null and b/src/tools/lcc/doc/lcc.pdf differ -- cgit

The lcc 4.1 Code-Generation Interface

Contents

Introduction

5.1 Type Metrics

5.3 Symbols

5.5 Dag Operators

5.6 Interface Flags

5.8 Definitions

5.9 Constants

5.12 Upcalls

Installing lcc

Contents

Introduction

Installation on UNIX

Building the Driver

Building the Compiler and Accessories

Installation on Windows NT 4.0 or Windows 95/98

Reporting Bugs

Keeping in Touch

Type		Supertype
signed char		int
signed short		int
unsigned char		int, if sizeof (char) < sizeof (int) + unsigned, otherwise
unsigned short		int, if sizeof (short) < sizeof (int) + unsigned, otherwise
void *		an unsigned type as large as a pointer

suffix	v Field	size
`F`	`v.d`	float, double, long double
`I`	`v.i`	signed char, signed short, signed int, signed long
`U`	`v.u`	unsigned char, unsigned short, unsigned int, unsigned long
`P`	`v.p`	void *

Specifiers		Corresponding printf Specifiers
`%c`		`%c`
`%d %D`		`%d %ld`
`%u %U`		`%u %lu`
`%x %X`		`%x %lx`
`%f %e %g`		`%e %f %g`
`%p`		Converts the corresponding void * argument to unsigned long and prints it with the `printf` + `%#x` specifier or just `%x` when the argument is null.
`%I`		Prints the number of spaces given by the corresponding argument.

`src`		source code
`etc`		driver, accessories
`lib`		runtime library source code
`cpp`		preprocessor source code
`lburg`		code-generator generator source code
`doc`		this document, man pages
`include//`		include files
`tst`		test suite
`alpha/*/tst`		ALPHA test outputs
`mips/*/tst`		MIPS test outputs
`sparc/*/tst`		SPARC test outputs
`x86/*/tst`		X86 test outputs