tccelf.c: factor out elf_output_obj()
[tinycc.git] / tcc.c
blob564b6fb14eeb7302ca27ff329bbe8beb55e6d3eb
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 #include "tcc.h"
22 #if ONE_SOURCE
23 # include "libtcc.c"
24 #endif
25 #include "tcctools.c"
27 static const char help[] =
28 "Tiny C Compiler "TCC_VERSION" - Copyright (C) 2001-2006 Fabrice Bellard\n"
29 "Usage: tcc [options...] [-o outfile] [-c] infile(s)...\n"
30 " tcc [options...] -run infile [arguments...]\n"
31 "General options:\n"
32 " -c compile only - generate an object file\n"
33 " -o outfile set output filename\n"
34 " -run run compiled source\n"
35 " -fflag set or reset (with 'no-' prefix) 'flag' (see tcc -hh)\n"
36 " -std=c99 Conform to the ISO 1999 C standard (default).\n"
37 " -std=c11 Conform to the ISO 2011 C standard.\n"
38 " -Wwarning set or reset (with 'no-' prefix) 'warning' (see tcc -hh)\n"
39 " -w disable all warnings\n"
40 " --version -v show version\n"
41 " -vv show search paths or loaded files\n"
42 " -h -hh show this, show more help\n"
43 " -bench show compilation statistics\n"
44 " - use stdin pipe as infile\n"
45 " @listfile read arguments from listfile\n"
46 "Preprocessor options:\n"
47 " -Idir add include path 'dir'\n"
48 " -Dsym[=val] define 'sym' with value 'val'\n"
49 " -Usym undefine 'sym'\n"
50 " -E preprocess only\n"
51 " -C keep comments (not yet implemented)\n"
52 "Linker options:\n"
53 " -Ldir add library path 'dir'\n"
54 " -llib link with dynamic or static library 'lib'\n"
55 " -r generate (relocatable) object file\n"
56 " -shared generate a shared library/dll\n"
57 " -rdynamic export all global symbols to dynamic linker\n"
58 " -soname set name for shared library to be used at runtime\n"
59 " -Wl,-opt[=val] set linker option (see tcc -hh)\n"
60 "Debugger options:\n"
61 " -g generate runtime debug info\n"
62 #ifdef CONFIG_TCC_BCHECK
63 " -b compile with built-in memory and bounds checker (implies -g)\n"
64 #endif
65 #ifdef CONFIG_TCC_BACKTRACE
66 " -bt[N] link with backtrace (stack dump) support [show max N callers]\n"
67 #endif
68 "Misc. options:\n"
69 " -x[c|a|b|n] specify type of the next infile (C,ASM,BIN,NONE)\n"
70 " -nostdinc do not use standard system include paths\n"
71 " -nostdlib do not link with standard crt and libraries\n"
72 " -Bdir set tcc's private include/library dir\n"
73 " -MD generate dependency file for make\n"
74 " -MF file specify dependency file name\n"
75 #if defined(TCC_TARGET_I386) || defined(TCC_TARGET_X86_64)
76 " -m32/64 defer to i386/x86_64 cross compiler\n"
77 #endif
78 "Tools:\n"
79 " create library : tcc -ar [rcsv] lib.a files\n"
80 #ifdef TCC_TARGET_PE
81 " create def file : tcc -impdef lib.dll [-v] [-o lib.def]\n"
82 #endif
85 static const char help2[] =
86 "Tiny C Compiler "TCC_VERSION" - More Options\n"
87 "Special options:\n"
88 " -P -P1 with -E: no/alternative #line output\n"
89 " -dD -dM with -E: output #define directives\n"
90 " -pthread same as -D_REENTRANT and -lpthread\n"
91 " -On same as -D__OPTIMIZE__ for n > 0\n"
92 " -Wp,-opt same as -opt\n"
93 " -include file include 'file' above each input file\n"
94 " -isystem dir add 'dir' to system include path\n"
95 " -static link to static libraries (not recommended)\n"
96 " -dumpversion print version\n"
97 " -print-search-dirs print search paths\n"
98 " -dt with -run/-E: auto-define 'test_...' macros\n"
99 "Ignored options:\n"
100 " --param -pedantic -pipe -s -traditional\n"
101 "-W... warnings:\n"
102 " all turn on some (*) warnings\n"
103 " error stop after first warning\n"
104 " unsupported warn about ignored options, pragmas, etc.\n"
105 " write-strings strings are const\n"
106 " implicit-function-declaration warn for missing prototype (*)\n"
107 "-f[no-]... flags:\n"
108 " unsigned-char default char is unsigned\n"
109 " signed-char default char is signed\n"
110 " common use common section instead of bss\n"
111 " leading-underscore decorate extern symbols\n"
112 " ms-extensions allow anonymous struct in struct\n"
113 " dollars-in-identifiers allow '$' in C symbols\n"
114 "-m... target specific options:\n"
115 " ms-bitfields use MSVC bitfield layout\n"
116 #ifdef TCC_TARGET_ARM
117 " float-abi hard/softfp on arm\n"
118 #endif
119 #ifdef TCC_TARGET_X86_64
120 " no-sse disable floats on x86_64\n"
121 #endif
122 "-Wl,... linker options:\n"
123 " -nostdlib do not link with standard crt/libs\n"
124 " -[no-]whole-archive load lib(s) fully/only as needed\n"
125 " -export-all-symbols same as -rdynamic\n"
126 " -export-dynamic same as -rdynamic\n"
127 " -image-base= -Ttext= set base address of executable\n"
128 " -section-alignment= set section alignment in executable\n"
129 #ifdef TCC_TARGET_PE
130 " -file-alignment= set PE file alignment\n"
131 " -stack= set PE stack reserve\n"
132 " -large-address-aware set related PE option\n"
133 " -subsystem=[console/windows] set PE subsystem\n"
134 " -oformat=[pe-* binary] set executable output format\n"
135 "Predefined macros:\n"
136 " tcc -E -dM - < nul\n"
137 #else
138 " -rpath= set dynamic library search path\n"
139 " -enable-new-dtags set DT_RUNPATH instead of DT_RPATH\n"
140 " -soname= set DT_SONAME elf tag\n"
141 " -Bsymbolic set DT_SYMBOLIC elf tag\n"
142 " -oformat=[elf32/64-* binary] set executable output format\n"
143 " -init= -fini= -as-needed -O (ignored)\n"
144 "Predefined macros:\n"
145 " tcc -E -dM - < /dev/null\n"
146 #endif
147 "See also the manual for more details.\n"
150 static const char version[] =
151 "tcc version "TCC_VERSION" ("
152 #ifdef TCC_TARGET_I386
153 "i386"
154 #elif defined TCC_TARGET_X86_64
155 "x86_64"
156 #elif defined TCC_TARGET_C67
157 "C67"
158 #elif defined TCC_TARGET_ARM
159 "ARM"
160 # ifdef TCC_ARM_EABI
161 " eabi"
162 # ifdef TCC_ARM_HARDFLOAT
163 "hf"
164 # endif
165 # endif
166 #elif defined TCC_TARGET_ARM64
167 "AArch64"
168 #elif defined TCC_TARGET_RISCV64
169 "riscv64"
170 #endif
171 #ifdef TCC_TARGET_PE
172 " Windows"
173 #elif defined(TCC_TARGET_MACHO)
174 " Darwin"
175 #elif TARGETOS_FreeBSD || TARGETOS_FreeBSD_kernel
176 " FreeBSD"
177 #elif TARGETOS_OpenBSD
178 " OpenBSD"
179 #elif TARGETOS_NetBSD
180 " NetBSD"
181 #else
182 " Linux"
183 #endif
184 ")\n"
187 static void print_dirs(const char *msg, char **paths, int nb_paths)
189 int i;
190 printf("%s:\n%s", msg, nb_paths ? "" : " -\n");
191 for(i = 0; i < nb_paths; i++)
192 printf(" %s\n", paths[i]);
195 static void print_search_dirs(TCCState *s)
197 printf("install: %s\n", s->tcc_lib_path);
198 /* print_dirs("programs", NULL, 0); */
199 print_dirs("include", s->sysinclude_paths, s->nb_sysinclude_paths);
200 print_dirs("libraries", s->library_paths, s->nb_library_paths);
201 #ifdef TCC_TARGET_PE
202 printf("libtcc1:\n %s/lib/"TCC_LIBTCC1"\n", s->tcc_lib_path);
203 #else
204 printf("libtcc1:\n %s/"TCC_LIBTCC1"\n", s->tcc_lib_path);
205 print_dirs("crt", s->crt_paths, s->nb_crt_paths);
206 printf("elfinterp:\n %s\n", DEFAULT_ELFINTERP(s));
207 #endif
210 static void set_environment(TCCState *s)
212 char * path;
214 path = getenv("C_INCLUDE_PATH");
215 if(path != NULL) {
216 tcc_add_sysinclude_path(s, path);
218 path = getenv("CPATH");
219 if(path != NULL) {
220 tcc_add_include_path(s, path);
222 path = getenv("LIBRARY_PATH");
223 if(path != NULL) {
224 tcc_add_library_path(s, path);
228 static char *default_outputfile(TCCState *s, const char *first_file)
230 char buf[1024];
231 char *ext;
232 const char *name = "a";
234 if (first_file && strcmp(first_file, "-"))
235 name = tcc_basename(first_file);
236 snprintf(buf, sizeof(buf), "%s", name);
237 ext = tcc_fileextension(buf);
238 #ifdef TCC_TARGET_PE
239 if (s->output_type == TCC_OUTPUT_DLL)
240 strcpy(ext, ".dll");
241 else
242 if (s->output_type == TCC_OUTPUT_EXE)
243 strcpy(ext, ".exe");
244 else
245 #endif
246 if (s->output_type == TCC_OUTPUT_OBJ && !s->option_r && *ext)
247 strcpy(ext, ".o");
248 else
249 strcpy(buf, "a.out");
250 return tcc_strdup(buf);
253 static unsigned getclock_ms(void)
255 #ifdef _WIN32
256 return GetTickCount();
257 #else
258 struct timeval tv;
259 gettimeofday(&tv, NULL);
260 return tv.tv_sec*1000 + (tv.tv_usec+500)/1000;
261 #endif
264 int main(int argc0, char **argv0)
266 TCCState *s, *s1;
267 int ret, opt, n = 0, t = 0, done;
268 unsigned start_time = 0;
269 const char *first_file;
270 int argc; char **argv;
271 FILE *ppfp = stdout;
273 redo:
274 argc = argc0, argv = argv0;
275 s = s1 = tcc_new();
276 opt = tcc_parse_args(s, &argc, &argv, 1);
278 if (n == 0) {
279 if (opt == OPT_HELP) {
280 fputs(help, stdout);
281 if (!s->verbose)
282 return 0;
283 ++opt;
285 if (opt == OPT_HELP2) {
286 fputs(help2, stdout);
287 return 0;
289 if (opt == OPT_M32 || opt == OPT_M64)
290 tcc_tool_cross(s, argv, opt); /* never returns */
291 if (s->verbose)
292 printf(version);
293 if (opt == OPT_AR)
294 return tcc_tool_ar(s, argc, argv);
295 #ifdef TCC_TARGET_PE
296 if (opt == OPT_IMPDEF)
297 return tcc_tool_impdef(s, argc, argv);
298 #endif
299 if (opt == OPT_V)
300 return 0;
301 if (opt == OPT_PRINT_DIRS) {
302 /* initialize search dirs */
303 set_environment(s);
304 tcc_set_output_type(s, TCC_OUTPUT_MEMORY);
305 print_search_dirs(s);
306 return 0;
309 if (s->nb_files == 0)
310 tcc_error("no input files\n");
312 if (s->output_type == TCC_OUTPUT_PREPROCESS) {
313 if (s->outfile && 0!=strcmp("-",s->outfile)) {
314 ppfp = fopen(s->outfile, "w");
315 if (!ppfp)
316 tcc_error("could not write '%s'", s->outfile);
318 } else if (s->output_type == TCC_OUTPUT_OBJ && !s->option_r) {
319 if (s->nb_libraries)
320 tcc_error("cannot specify libraries with -c");
321 if (s->nb_files > 1 && s->outfile)
322 tcc_error("cannot specify output file with -c many files");
325 if (s->do_bench)
326 start_time = getclock_ms();
329 set_environment(s);
330 if (s->output_type == 0)
331 s->output_type = TCC_OUTPUT_EXE;
332 tcc_set_output_type(s, s->output_type);
333 s->ppfp = ppfp;
335 if ((s->output_type == TCC_OUTPUT_MEMORY
336 || s->output_type == TCC_OUTPUT_PREPROCESS)
337 && (s->dflag & 16)) { /* -dt option */
338 if (t)
339 s->dflag |= 32;
340 s->run_test = ++t;
341 if (n)
342 --n;
345 /* compile or add each files or library */
346 first_file = NULL, ret = 0;
347 do {
348 struct filespec *f = s->files[n];
349 s->filetype = f->type;
350 if (f->type & AFF_TYPE_LIB) {
351 if (tcc_add_library_err(s, f->name) < 0)
352 ret = 1;
353 } else {
354 if (1 == s->verbose)
355 printf("-> %s\n", f->name);
356 if (!first_file)
357 first_file = f->name;
358 if (tcc_add_file(s, f->name) < 0)
359 ret = 1;
361 done = ret || ++n >= s->nb_files;
362 } while (!done && (s->output_type != TCC_OUTPUT_OBJ || s->option_r));
364 if (s->run_test) {
365 t = 0;
366 } else if (s->output_type == TCC_OUTPUT_PREPROCESS) {
368 } else if (0 == ret) {
369 if (s->output_type == TCC_OUTPUT_MEMORY) {
370 #ifdef TCC_IS_NATIVE
371 ret = tcc_run(s, argc, argv);
372 #endif
373 } else {
374 if (!s->outfile)
375 s->outfile = default_outputfile(s, first_file);
376 if (tcc_output_file(s, s->outfile))
377 ret = 1;
378 else if (s->gen_deps)
379 gen_makedeps(s, s->outfile, s->deps_outfile);
383 if (s->do_bench && done && !(t | ret))
384 tcc_print_stats(s, getclock_ms() - start_time);
385 tcc_delete(s);
386 if (!done)
387 goto redo; /* compile more files with -c */
388 if (t)
389 goto redo; /* run more tests with -dt -run */
390 if (ppfp && ppfp != stdout)
391 fclose(ppfp);
392 return ret;