Align 'implicit-function-declaration' option comment with other comments (cosmetic...
[tinycc.git] / tcc.c
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1 /*
2 * TCC - Tiny C Compiler
3 *
4 * Copyright (c) 2001-2004 Fabrice Bellard
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 #ifdef ONE_SOURCE
22 #include "libtcc.c"
23 #else
24 #include "tcc.h"
25 #endif
26 #include "tcctools.c"
28 static const char help[] =
29 "Tiny C Compiler "TCC_VERSION" - Copyright (C) 2001-2006 Fabrice Bellard\n"
30 "Usage: tcc [options...] [-o outfile] [-c] infile(s)...\n"
31 " tcc [options...] -run infile [arguments...]\n"
32 "General options:\n"
33 " -c compile only - generate an object file\n"
34 " -o outfile set output filename\n"
35 " -run run compiled source\n"
36 " -fflag set or reset (with 'no-' prefix) 'flag' (see tcc -hh)\n"
37 " -Wwarning set or reset (with 'no-' prefix) 'warning' (see tcc -hh)\n"
38 " -w disable all warnings\n"
39 " -v -vv show version, show search paths or loaded files\n"
40 " -h -hh show this, show more help\n"
41 " -bench show compilation statistics\n"
42 " - use stdin pipe as infile\n"
43 " @listfile read arguments from listfile\n"
44 "Preprocessor options:\n"
45 " -Idir add include path 'dir'\n"
46 " -Dsym[=val] define 'sym' with value 'val'\n"
47 " -Usym undefine 'sym'\n"
48 " -E preprocess only\n"
49 "Linker options:\n"
50 " -Ldir add library path 'dir'\n"
51 " -llib link with dynamic or static library 'lib'\n"
52 " -r generate (relocatable) object file\n"
53 " -shared generate a shared library/dll\n"
54 " -rdynamic export all global symbols to dynamic linker\n"
55 " -soname set name for shared library to be used at runtime\n"
56 " -Wl,-opt[=val] set linker option (see tcc -hh)\n"
57 "Debugger options:\n"
58 " -g generate runtime debug info\n"
59 #ifdef CONFIG_TCC_BCHECK
60 " -b compile with built-in memory and bounds checker (implies -g)\n"
61 #endif
62 #ifdef CONFIG_TCC_BACKTRACE
63 " -bt N show N callers in stack traces\n"
64 #endif
65 "Misc. options:\n"
66 " -x[c|a|n] specify type of the next infile\n"
67 " -nostdinc do not use standard system include paths\n"
68 " -nostdlib do not link with standard crt and libraries\n"
69 " -Bdir set tcc's private include/library dir\n"
70 " -MD generate dependency file for make\n"
71 " -MF file specify dependency file name\n"
72 " -m32/64 defer to i386/x86_64 cross compiler\n"
73 "Tools:\n"
74 " create library : tcc -ar [rcsv] lib.a files\n"
75 #ifdef TCC_TARGET_PE
76 " create def file : tcc -impdef lib.dll [-v] [-o lib.def]\n"
77 #endif
80 static const char help2[] =
81 "Tiny C Compiler "TCC_VERSION" - More Options\n"
82 "Special options:\n"
83 " -P -P1 with -E: no/alternative #line output\n"
84 " -dD -dM with -E: output #define directives\n"
85 " -pthread same as -D_REENTRANT and -lpthread\n"
86 " -On same as -D__OPTIMIZE__ for n > 0\n"
87 " -Wp,-opt same as -opt\n"
88 " -include file include 'file' above each input file\n"
89 " -isystem dir add 'dir' to system include path\n"
90 " -iwithprefix dir set tcc's private include/library subdir\n"
91 " -static link to static libraries (not recommended)\n"
92 " -dumpversion print version\n"
93 " -print-search-dirs print search paths\n"
94 "Ignored options:\n"
95 " --param -pedantic -pipe -s -std -traditional\n"
96 "-W... warnings:\n"
97 " all turn on some (*) warnings\n"
98 " error stop after first warning\n"
99 " unsupported warn about ignored options, pragmas, etc.\n"
100 " write-strings strings are const\n"
101 " implicit-function-declaration warn for missing prototype (*)\n"
102 "-f[no-]... flags:\n"
103 " unsigned-char default char is unsigned\n"
104 " signed-char default char is signed\n"
105 " common use common section instead of bss\n"
106 " leading-underscore decorate extern symbols\n"
107 " ms-extensions allow anonymous struct in struct\n"
108 " dollars-in-identifiers allow '$' in C symbols\n"
109 "-m... target specific options:\n"
110 " ms-bitfields use MSVC bitfield layout\n"
111 #ifdef TCC_TARGET_ARM
112 " float-abi hard/softfp on arm\n"
113 #endif
114 #ifdef TCC_TARGET_X86_64
115 " no-sse disable floats on x86_64\n"
116 #endif
117 "-Wl,... linker options:\n"
118 " -nostdlib do not link with standard crt/libs\n"
119 " -[no-]whole-archive load lib(s) fully/only as needed\n"
120 " -export-all-symbols same as -rdynamic\n"
121 " -image-base= -Ttext= set base address of executable\n"
122 " -section-alignment= set section alignment in executable\n"
123 #ifdef TCC_TARGET_PE
124 " -file-alignment= set PE file alignment\n"
125 " -stack= set PE stack reserve\n"
126 " -large-address-aware set related PE option\n"
127 " -subsystem=[console/windows] set PE subsystem\n"
128 " -oformat=[pe-* binary] set executable output format\n"
129 "Predefined macros:\n"
130 " tcc -E -dM - < nul\n"
131 #else
132 " -rpath= set dynamic library search path\n"
133 " -enable-new-dtags set DT_RUNPATH instead of DT_RPATH\n"
134 " -soname= set DT_SONAME elf tag\n"
135 " -Bsymbolic set DT_SYMBOLIC elf tag\n"
136 " -oformat=[elf32/64-* binary] set executable output format\n"
137 " -init= -fini= -as-needed -O (ignored)\n"
138 "Predefined macros:\n"
139 " tcc -E -dM - < /dev/null\n"
140 #endif
141 "See also the manual for more details.\n"
144 static const char version[] =
145 "tcc version "TCC_VERSION" ("
146 #ifdef TCC_TARGET_I386
147 "i386"
148 #elif defined TCC_TARGET_X86_64
149 "x86_64"
150 #elif defined TCC_TARGET_C67
151 "C67"
152 #elif defined TCC_TARGET_ARM
153 "ARM"
154 #elif defined TCC_TARGET_ARM64
155 "AArch64"
156 #endif
157 #ifdef TCC_ARM_HARDFLOAT
158 " Hard Float"
159 #endif
160 #ifdef TCC_TARGET_PE
161 " Windows"
162 #elif defined(TCC_TARGET_MACHO)
163 " Darwin"
164 #elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
165 " FreeBSD"
166 #else
167 " Linux"
168 #endif
169 ")\n"
172 static void print_dirs(const char *msg, char **paths, int nb_paths)
174 int i;
175 printf("%s:\n%s", msg, nb_paths ? "" : " -\n");
176 for(i = 0; i < nb_paths; i++)
177 printf(" %s\n", paths[i]);
180 static void print_search_dirs(TCCState *s)
182 printf("install: %s\n", s->tcc_lib_path);
183 /* print_dirs("programs", NULL, 0); */
184 print_dirs("include", s->sysinclude_paths, s->nb_sysinclude_paths);
185 print_dirs("libraries", s->library_paths, s->nb_library_paths);
186 #ifndef TCC_TARGET_PE
187 print_dirs("crt", s->crt_paths, s->nb_crt_paths);
188 printf("libtcc1:\n %s/"TCC_LIBTCC1"\n", s->tcc_lib_path);
189 printf("elfinterp:\n %s\n", DEFAULT_ELFINTERP(s));
190 #endif
193 static void set_environment(TCCState *s)
195 char * path;
197 path = getenv("C_INCLUDE_PATH");
198 if(path != NULL) {
199 tcc_add_include_path(s, path);
201 path = getenv("CPATH");
202 if(path != NULL) {
203 tcc_add_include_path(s, path);
205 path = getenv("LIBRARY_PATH");
206 if(path != NULL) {
207 tcc_add_library_path(s, path);
211 static char *default_outputfile(TCCState *s, const char *first_file)
213 char buf[1024];
214 char *ext;
215 const char *name = "a";
217 if (first_file && strcmp(first_file, "-"))
218 name = tcc_basename(first_file);
219 snprintf(buf, sizeof(buf), "%s", name);
220 ext = tcc_fileextension(buf);
221 #ifdef TCC_TARGET_PE
222 if (s->output_type == TCC_OUTPUT_DLL)
223 strcpy(ext, ".dll");
224 else
225 if (s->output_type == TCC_OUTPUT_EXE)
226 strcpy(ext, ".exe");
227 else
228 #endif
229 if (s->output_type == TCC_OUTPUT_OBJ && !s->option_r && *ext)
230 strcpy(ext, ".o");
231 else
232 strcpy(buf, "a.out");
233 return tcc_strdup(buf);
236 static unsigned getclock_ms(void)
238 #ifdef _WIN32
239 return GetTickCount();
240 #else
241 struct timeval tv;
242 gettimeofday(&tv, NULL);
243 return tv.tv_sec*1000 + (tv.tv_usec+500)/1000;
244 #endif
247 int main(int argc, char **argv)
249 TCCState *s;
250 int ret, opt, n = 0;
251 unsigned start_time = 0;
252 const char *first_file;
254 redo:
255 s = tcc_new();
256 opt = tcc_parse_args(s, &argc, &argv, 1);
258 if (n == 0) {
259 if (opt == OPT_HELP)
260 return printf(help), 1;
261 if (opt == OPT_HELP2)
262 return printf(help2), 1;
263 if (opt == OPT_M32 || opt == OPT_M64)
264 tcc_tool_cross(s, argv, opt); /* never returns */
265 if (s->verbose)
266 printf(version);
267 if (opt == OPT_AR)
268 return tcc_tool_ar(s, argc, argv);
269 #ifdef TCC_TARGET_PE
270 if (opt == OPT_IMPDEF)
271 return tcc_tool_impdef(s, argc, argv);
272 #endif
273 if (opt == OPT_V)
274 return 0;
275 if (opt == OPT_PRINT_DIRS) {
276 /* initialize search dirs */
277 tcc_set_output_type(s, TCC_OUTPUT_MEMORY);
278 print_search_dirs(s);
279 return 0;
282 n = s->nb_files;
283 if (n == 0)
284 tcc_error("no input files\n");
286 if (s->output_type == TCC_OUTPUT_PREPROCESS) {
287 if (!s->outfile) {
288 s->ppfp = stdout;
289 } else {
290 s->ppfp = fopen(s->outfile, "w");
291 if (!s->ppfp)
292 tcc_error("could not write '%s'", s->outfile);
294 } else if (s->output_type == TCC_OUTPUT_OBJ && !s->option_r) {
295 if (s->nb_libraries)
296 tcc_error("cannot specify libraries with -c");
297 if (n > 1 && s->outfile)
298 tcc_error("cannot specify output file with -c many files");
299 } else {
300 if (s->option_pthread)
301 tcc_set_options(s, "-lpthread");
304 if (s->do_bench)
305 start_time = getclock_ms();
308 set_environment(s);
309 if (s->output_type == 0)
310 s->output_type = TCC_OUTPUT_EXE;
311 tcc_set_output_type(s, s->output_type);
313 /* compile or add each files or library */
314 for (first_file = NULL, ret = 0;;) {
315 struct filespec *f = s->files[s->nb_files - n];
316 s->filetype = f->type;
317 s->alacarte_link = f->alacarte;
318 if (f->type == AFF_TYPE_LIB) {
319 if (tcc_add_library_err(s, f->name) < 0)
320 ret = 1;
321 } else {
322 if (1 == s->verbose)
323 printf("-> %s\n", f->name);
324 if (!first_file)
325 first_file = f->name;
326 if (tcc_add_file(s, f->name) < 0)
327 ret = 1;
329 s->filetype = 0;
330 s->alacarte_link = 1;
331 if (ret || --n == 0
332 || (s->output_type == TCC_OUTPUT_OBJ && !s->option_r))
333 break;
336 if (s->output_type == TCC_OUTPUT_PREPROCESS) {
337 if (s->outfile)
338 fclose(s->ppfp);
339 } else if (0 == ret) {
340 if (s->output_type == TCC_OUTPUT_MEMORY) {
341 #ifdef TCC_IS_NATIVE
342 ret = tcc_run(s, argc, argv);
343 #endif
344 } else {
345 if (!s->outfile)
346 s->outfile = default_outputfile(s, first_file);
347 if (tcc_output_file(s, s->outfile))
348 ret = 1;
349 else if (s->gen_deps)
350 gen_makedeps(s, s->outfile, s->deps_outfile);
354 if (s->do_bench && ret == 0 && n == 0)
355 tcc_print_stats(s, getclock_ms() - start_time);
356 tcc_delete(s);
357 if (ret == 0 && n)
358 goto redo; /* compile more files with -c */
359 return ret;