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tinycc/tcc.c

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/*
* TCC - Tiny C Compiler
*
* Copyright (c) 2001-2004 Fabrice Bellard
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifdef ONE_SOURCE
#include "libtcc.c"
#else
#include "tcc.h"
#endif
static void print_paths(const char *msg, char **paths, int nb_paths)
{
int i;
printf("%s:\n%s", msg, nb_paths ? "" : " -\n");
for(i = 0; i < nb_paths; i++)
printf(" %s\n", paths[i]);
}
static void display_info(TCCState *s, int what)
{
switch (what) {
case 0:
printf("tcc version %s ("
#ifdef TCC_TARGET_I386
"i386"
#elif defined TCC_TARGET_X86_64
"x86-64"
#elif defined TCC_TARGET_C67
"C67"
#elif defined TCC_TARGET_ARM
"ARM"
# ifdef TCC_ARM_HARDFLOAT
" Hard Float"
# endif
#elif defined TCC_TARGET_ARM64
"AArch64"
# ifdef TCC_ARM_HARDFLOAT
" Hard Float"
# endif
#endif
#ifdef TCC_TARGET_PE
" Windows"
#else
" Linux"
#endif
")\n", TCC_VERSION);
break;
case 1:
printf("install: %s\n", s->tcc_lib_path);
/* print_paths("programs", NULL, 0); */
print_paths("include", s->sysinclude_paths, s->nb_sysinclude_paths);
print_paths("libraries", s->library_paths, s->nb_library_paths);
#ifndef TCC_TARGET_PE
print_paths("crt", s->crt_paths, s->nb_crt_paths);
printf("elfinterp:\n %s\n", DEFAULT_ELFINTERP(s));
#endif
break;
}
}
static void help(void)
{
printf("Tiny C Compiler "TCC_VERSION" - Copyright (C) 2001-2006 Fabrice Bellard\n"
"Usage: tcc [options...] [-o outfile] [-c] infile(s)...\n"
" tcc [options...] -run infile [arguments...]\n"
"General options:\n"
" -c compile only - generate an object file\n"
" -o outfile set output filename\n"
" -run run compiled source\n"
" -fflag set or reset (with 'no-' prefix) 'flag' (see man page)\n"
" -Wwarning set or reset (with 'no-' prefix) 'warning' (see man page)\n"
" -w disable all warnings\n"
" -v show version\n"
" -vv show included files (as sole argument: show search paths)\n"
" -dumpversion\n"
" -bench show compilation statistics\n"
"Preprocessor options:\n"
" -Idir add include path 'dir'\n"
" -Dsym[=val] define 'sym' with value 'val'\n"
" -Usym undefine 'sym'\n"
" -E preprocess only\n"
" -P[1] no/alternative output of #line directives with -E\n"
" -dD dump defines\n"
"Linker options:\n"
" -Ldir add library path 'dir'\n"
" -llib link with dynamic or static library 'lib'\n"
" -pthread link with -lpthread and -D_REENTRANT (POSIX Linux)\n"
" -r generate (relocatable) object file\n"
" -rdynamic export all global symbols to dynamic linker\n"
" -shared generate a shared library\n"
" -soname set name for shared library to be used at runtime\n"
" -static static linking\n"
" -Wl,-opt[=val] set linker option (see manual)\n"
"Debugger options:\n"
" -g generate runtime debug info\n"
#ifdef CONFIG_TCC_BCHECK
" -b compile with built-in memory and bounds checker (implies -g)\n"
#endif
#ifdef CONFIG_TCC_BACKTRACE
" -bt N show N callers in stack traces\n"
#endif
"Misc options:\n"
" -nostdinc do not use standard system include paths\n"
" -nostdlib do not link with standard crt and libraries\n"
" -Bdir use 'dir' as tcc internal library and include path\n"
" -MD generate target dependencies for make\n"
" -MF depfile put generated dependencies here\n"
);
}
/* re-execute the i386/x86_64 cross-compilers with tcc -m32/-m64: */
#if defined TCC_TARGET_I386 || defined TCC_TARGET_X86_64
#ifdef _WIN32
#include <process.h>
static int execvp_win32(const char *prog, char **argv)
{
int ret = spawnvp(P_NOWAIT, prog, (const char *const*)argv);
if (-1 == ret)
return ret;
cwait(&ret, ret, WAIT_CHILD);
exit(ret);
}
#define execvp execvp_win32
#endif
static void exec_other_tcc(TCCState *s, char **argv, const char *optarg)
{
char child_path[4096], *child_name; const char *target;
switch (atoi(optarg)) {
#ifdef TCC_TARGET_I386
case 32: break;
case 64: target = "x86_64";
#else
case 64: break;
case 32: target = "i386";
#endif
pstrcpy(child_path, sizeof child_path - 40, argv[0]);
child_name = tcc_basename(child_path);
strcpy(child_name, target);
#ifdef TCC_TARGET_PE
strcat(child_name, "-win32");
#endif
strcat(child_name, "-tcc");
if (strcmp(argv[0], child_path)) {
if (s->verbose > 0)
printf("tcc: using '%s'\n", child_name), fflush(stdout);
execvp(argv[0] = child_path, argv);
}
tcc_error("'%s' not found", child_name);
case 0: /* ignore -march etc. */
break;
default:
tcc_warning("unsupported option \"-m%s\"", optarg);
}
}
#else
#define exec_other_tcc(s, argv, optarg)
#endif
static void gen_makedeps(TCCState *s, const char *target, const char *filename)
{
FILE *depout;
char buf[1024], *ext;
int i;
if (!filename) {
/* compute filename automatically
* dir/file.o -> dir/file.d */
pstrcpy(buf, sizeof(buf), target);
ext = tcc_fileextension(buf);
pstrcpy(ext, sizeof(buf) - (ext-buf), ".d");
filename = buf;
}
if (s->verbose)
printf("<- %s\n", filename);
/* XXX return err codes instead of error() ? */
depout = fopen(filename, "w");
if (!depout)
tcc_error("could not open '%s'", filename);
fprintf(depout, "%s : \\\n", target);
for (i=0; i<s->nb_target_deps; ++i)
fprintf(depout, " %s \\\n", s->target_deps[i]);
fprintf(depout, "\n");
fclose(depout);
}
static char *default_outputfile(TCCState *s, const char *first_file)
{
char buf[1024];
char *ext;
const char *name = "a";
if (first_file && strcmp(first_file, "-"))
name = tcc_basename(first_file);
pstrcpy(buf, sizeof(buf), name);
ext = tcc_fileextension(buf);
#ifdef TCC_TARGET_PE
if (s->output_type == TCC_OUTPUT_DLL)
strcpy(ext, ".dll");
else
if (s->output_type == TCC_OUTPUT_EXE)
strcpy(ext, ".exe");
else
#endif
if (( (s->output_type == TCC_OUTPUT_OBJ && !s->option_r) ||
(s->output_type == TCC_OUTPUT_PREPROCESS) )
&& *ext)
strcpy(ext, ".o");
else
strcpy(buf, "a.out");
return tcc_strdup(buf);
}
static int64_t getclock_us(void)
{
#ifdef _WIN32
struct _timeb tb;
_ftime(&tb);
return (tb.time * 1000LL + tb.millitm) * 1000LL;
#else
struct timeval tv;
gettimeofday(&tv, NULL);
return tv.tv_sec * 1000000LL + tv.tv_usec;
#endif
}
int main(int argc, char **argv)
{
TCCState *s;
int ret, optind, i;
int64_t start_time = 0;
s = tcc_new();
optind = tcc_parse_args(s, argc - 1, argv + 1);
if (s->do_bench)
start_time = getclock_us();
tcc_set_environment(s);
if (optind == 0) {
help();
return 1;
}
if (s->option_m)
exec_other_tcc(s, argv, s->option_m);
if (s->verbose)
display_info(s, 0);
if (s->print_search_dirs || (s->verbose == 2 && optind == 1)) {
tcc_set_output_type(s, TCC_OUTPUT_MEMORY);
display_info(s, 1);
return 0;
}
if (s->verbose && optind == 1)
return 0;
if (s->nb_files == 0)
tcc_error("no input files\n");
/* check -c consistency : only single file handled. XXX: checks file type */
if (s->output_type == TCC_OUTPUT_OBJ && !s->option_r) {
if (s->nb_libraries != 0)
tcc_error("cannot specify libraries with -c");
/* accepts only a single input file */
if ((s->nb_files != 1) && s->outfile) {
tcc_error("cannot specify multiple files with -c and -o");
}
}
if (s->output_type == TCC_OUTPUT_PREPROCESS) {
if (!s->outfile) {
s->ppfp = stdout;
} else {
s->ppfp = fopen(s->outfile, "w");
if (!s->ppfp)
tcc_error("could not write '%s'", s->outfile);
}
}
tcc_set_output_type(s, s->output_type);
/* compile or add each files or library */
for(i = ret = 0; i < s->nb_files && ret == 0; i++) {
int filetype = *(unsigned char *)s->files[i];
const char *filename = s->files[i] + 1;
if (filename[0] == '-' && filename[1] == 'l') {
if (tcc_add_library(s, filename + 2) < 0) {
tcc_error_noabort("cannot find library 'lib%s'", filename+2);
ret = 1;
}
} else {
if (1 == s->verbose)
printf("-> %s\n", filename);
if (!s->outfile)
s->outfile = default_outputfile(s, filename);
if (tcc_add_file(s, filename, filetype) < 0)
ret = 1;
else
if (s->output_type == TCC_OUTPUT_OBJ) {
ret = !!tcc_output_file(s, s->outfile);
if (s->gen_deps && !ret)
gen_makedeps(s, s->outfile, s->deps_outfile);
if (!ret) {
if ((i+1) < s->nb_files) {
tcc_delete(s);
s = tcc_new();
tcc_parse_args(s, argc - 1, argv + 1);
tcc_set_environment(s);
if (s->output_type != TCC_OUTPUT_OBJ)
tcc_error("interlnal error");
tcc_set_output_type(s, s->output_type);
}
}
}
}
}
if (0 == ret) {
if (s->output_type == TCC_OUTPUT_MEMORY) {
#ifdef TCC_IS_NATIVE
ret = tcc_run(s, argc - 1 - optind, argv + 1 + optind);
#else
tcc_error_noabort("-run is not available in a cross compiler");
ret = 1;
#endif
} else
if (s->output_type == TCC_OUTPUT_EXE ||
s->output_type == TCC_OUTPUT_DLL)
{
ret = !!tcc_output_file(s, s->outfile);
if (s->gen_deps && !ret)
gen_makedeps(s, s->outfile, s->deps_outfile);
}
}
if (s->do_bench)
tcc_print_stats(s, getclock_us() - start_time);
tcc_delete(s);
return ret;
}
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