tcc.c

   1 /*
   2  *  TCC - Tiny C Compiler
   3  *
   4  *  Copyright (c) 2001-2004 Fabrice Bellard
   5  *
   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.
  10  *
  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.
  15  *
  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
  19  */
  20
  21 #ifdef ONE_SOURCE
  22 #include "libtcc.c"
  23 #else
  24 #include "tcc.h"
  25 #endif
  26
  27 static void print_paths(const char *msg, char **paths, int nb_paths)
  28 {
  29     int i;
  30     printf("%s:\n%s", msg, nb_paths ? "" : "  -\n");
  31     for(i = 0; i < nb_paths; i++)
  32         printf("  %s\n", paths[i]);
  33 }
  34
  35 static void display_info(TCCState *s, int what)
  36 {
  37     switch (what) {
  38     case 0:
  39         printf("tcc version %s ("
  40 #ifdef TCC_TARGET_I386
  41         "i386"
  42 #elif defined TCC_TARGET_X86_64
  43         "x86-64"
  44 #elif defined TCC_TARGET_C67
  45         "C67"
  46 #elif defined TCC_TARGET_ARM
  47         "ARM"
  48 # ifdef TCC_ARM_HARDFLOAT
  49         " Hard Float"
  50 # endif
  51 #elif defined TCC_TARGET_ARM64
  52         "AArch64"
  53 # ifdef TCC_ARM_HARDFLOAT
  54         " Hard Float"
  55 # endif
  56 #endif
  57 #ifdef TCC_TARGET_PE
  58         " Windows"
  59 #else
  60         " Linux"
  61 #endif
  62         ")\n", TCC_VERSION);
  63         break;
  64     case 1:
  65         printf("install: %s\n", s->tcc_lib_path);
  66         /* print_paths("programs", NULL, 0); */
  67         print_paths("include", s->sysinclude_paths, s->nb_sysinclude_paths);
  68         print_paths("libraries", s->library_paths, s->nb_library_paths);
  69 #ifndef TCC_TARGET_PE
  70         print_paths("crt", s->crt_paths, s->nb_crt_paths);
  71         printf("elfinterp:\n  %s\n",  DEFAULT_ELFINTERP(s));
  72 #endif
  73         break;
  74     }
  75 }
  76
  77 static void help(void)
  78 {
  79     printf("Tiny C Compiler "TCC_VERSION" - Copyright (C) 2001-2006 Fabrice Bellard\n"
  80            "Usage: tcc [options...] [-o outfile] [-c] infile(s)...\n"
  81            "       tcc [options...] -run infile [arguments...]\n"
  82            "General options:\n"
  83            "  -c          compile only - generate an object file\n"
  84            "  -o outfile  set output filename\n"
  85            "  -run        run compiled source\n"
  86            "  -fflag      set or reset (with 'no-' prefix) 'flag' (see man page)\n"
  87            "  -Wwarning   set or reset (with 'no-' prefix) 'warning' (see man page)\n"
  88            "  -w          disable all warnings\n"
  89            "  -v          show version\n"
  90            "  -vv         show included files (as sole argument: show search paths)\n"
  91            "  -dumpversion\n"
  92            "  -bench      show compilation statistics\n"
  93            "Preprocessor options:\n"
  94            "  -Idir       add include path 'dir'\n"
  95            "  -Dsym[=val] define 'sym' with value 'val'\n"
  96            "  -Usym       undefine 'sym'\n"
  97            "  -E          preprocess only\n"
  98            "  -P[1]       no/alternative output of #line directives with -E\n"
  99            "  -dD         dump defines\n"
 100            "Linker options:\n"
 101            "  -Ldir       add library path 'dir'\n"
 102            "  -llib       link with dynamic or static library 'lib'\n"
 103            "  -pthread    link with -lpthread and -D_REENTRANT (POSIX Linux)\n"
 104            "  -r          generate (relocatable) object file\n"
 105            "  -rdynamic   export all global symbols to dynamic linker\n"
 106            "  -shared     generate a shared library\n"
 107            "  -soname     set name for shared library to be used at runtime\n"
 108            "  -static     static linking\n"
 109            "  -Wl,-opt[=val]  set linker option (see manual)\n"
 110            "Debugger options:\n"
 111            "  -g          generate runtime debug info\n"
 112 #ifdef CONFIG_TCC_BCHECK
 113            "  -b          compile with built-in memory and bounds checker (implies -g)\n"
 114 #endif
 115 #ifdef CONFIG_TCC_BACKTRACE
 116            "  -bt N       show N callers in stack traces\n"
 117 #endif
 118            "Misc options:\n"
 119            "  -nostdinc   do not use standard system include paths\n"
 120            "  -nostdlib   do not link with standard crt and libraries\n"
 121            "  -Bdir       use 'dir' as tcc internal library and include path\n"
 122            "  -MD         generate target dependencies for make\n"
 123            "  -MF depfile put generated dependencies here\n"
 124            );
 125 }
 126
 127 /* re-execute the i386/x86_64 cross-compilers with tcc -m32/-m64: */
 128 #if defined TCC_TARGET_I386 || defined TCC_TARGET_X86_64
 129 #ifdef _WIN32
 130 #include <process.h>
 131 static int execvp_win32(const char *prog, char **argv)
 132 {
 133     int ret = spawnvp(P_NOWAIT, prog, (const char *const*)argv);
 134     if (-1 == ret)
 135         return ret;
 136     cwait(&ret, ret, WAIT_CHILD);
 137     exit(ret);
 138 }
 139 #define execvp execvp_win32
 140 #endif
 141 static void exec_other_tcc(TCCState *s, char **argv, const char *optarg)
 142 {
 143     char child_path[4096], *child_name; const char *target;
 144     switch (atoi(optarg)) {
 145 #ifdef TCC_TARGET_I386
 146         case 32: break;
 147         case 64: target = "x86_64";
 148 #else
 149         case 64: break;
 150         case 32: target = "i386";
 151 #endif
 152             pstrcpy(child_path, sizeof child_path - 40, argv[0]);
 153             child_name = tcc_basename(child_path);
 154             strcpy(child_name, target);
 155 #ifdef TCC_TARGET_PE
 156             strcat(child_name, "-win32");
 157 #endif
 158             strcat(child_name, "-tcc");
 159             if (strcmp(argv[0], child_path)) {
 160                 if (s->verbose > 0)
 161                     printf("tcc: using '%s'\n", child_name), fflush(stdout);
 162                 execvp(argv[0] = child_path, argv);
 163             }
 164             tcc_error("'%s' not found", child_name);
 165         case 0: /* ignore -march etc. */
 166             break;
 167         default:
 168             tcc_warning("unsupported option \"-m%s\"", optarg);
 169     }
 170 }
 171 #else
 172 #define exec_other_tcc(s, argv, optarg)
 173 #endif
 174
 175 static void gen_makedeps(TCCState *s, const char *target, const char *filename)
 176 {
 177     FILE *depout;
 178     char buf[1024], *ext;
 179     int i;
 180
 181     if (!filename) {
 182         /* compute filename automatically
 183          * dir/file.o -> dir/file.d             */
 184         pstrcpy(buf, sizeof(buf), target);
 185         ext = tcc_fileextension(buf);
 186         pstrcpy(ext, sizeof(buf) - (ext-buf), ".d");
 187         filename = buf;
 188     }
 189
 190     if (s->verbose)
 191         printf("<- %s\n", filename);
 192
 193     /* XXX return err codes instead of error() ? */
 194     depout = fopen(filename, "w");
 195     if (!depout)
 196         tcc_error("could not open '%s'", filename);
 197
 198     fprintf(depout, "%s : \\\n", target);
 199     for (i=0; i<s->nb_target_deps; ++i)
 200         fprintf(depout, " %s \\\n", s->target_deps[i]);
 201     fprintf(depout, "\n");
 202     fclose(depout);
 203 }
 204
 205 static char *default_outputfile(TCCState *s, const char *first_file)
 206 {
 207     char buf[1024];
 208     char *ext;
 209     const char *name = "a";
 210
 211     if (first_file && strcmp(first_file, "-"))
 212         name = tcc_basename(first_file);
 213     pstrcpy(buf, sizeof(buf), name);
 214     ext = tcc_fileextension(buf);
 215 #ifdef TCC_TARGET_PE
 216     if (s->output_type == TCC_OUTPUT_DLL)
 217         strcpy(ext, ".dll");
 218     else
 219     if (s->output_type == TCC_OUTPUT_EXE)
 220         strcpy(ext, ".exe");
 221     else
 222 #endif
 223     if (( (s->output_type == TCC_OUTPUT_OBJ && !s->option_r) ||
 224           (s->output_type == TCC_OUTPUT_PREPROCESS) )
 225         && *ext)
 226         strcpy(ext, ".o");
 227     else
 228         strcpy(buf, "a.out");
 229
 230     return tcc_strdup(buf);
 231 }
 232
 233 static int64_t getclock_us(void)
 234 {
 235 #ifdef _WIN32
 236     struct _timeb tb;
 237     _ftime(&tb);
 238     return (tb.time * 1000LL + tb.millitm) * 1000LL;
 239 #else
 240     struct timeval tv;
 241     gettimeofday(&tv, NULL);
 242     return tv.tv_sec * 1000000LL + tv.tv_usec;
 243 #endif
 244 }
 245
 246 int main(int argc, char **argv)
 247 {
 248     TCCState *s;
 249     int ret, optind, i;
 250     int64_t start_time = 0;
 251
 252     s = tcc_new();
 253
 254     optind = tcc_parse_args(s, argc - 1, argv + 1);
 255
 256     if (s->do_bench)
 257         start_time = getclock_us();
 258
 259     tcc_set_environment(s);
 260
 261     if (optind == 0) {
 262         help();
 263         return 1;
 264     }
 265
 266     if (s->option_m)
 267         exec_other_tcc(s, argv, s->option_m);
 268
 269     if (s->verbose)
 270         display_info(s, 0);
 271
 272     if (s->print_search_dirs || (s->verbose == 2 && optind == 1)) {
 273         tcc_set_output_type(s, TCC_OUTPUT_MEMORY);
 274         display_info(s, 1);
 275         return 0;
 276     }
 277
 278     if (s->verbose && optind == 1)
 279         return 0;
 280
 281     if (s->nb_files == 0)
 282         tcc_error("no input files\n");
 283
 284     /* check -c consistency : only single file handled. XXX: checks file type */
 285     if (s->output_type == TCC_OUTPUT_OBJ && !s->option_r) {
 286         if (s->nb_libraries != 0)
 287             tcc_error("cannot specify libraries with -c");
 288         /* accepts only a single input file */
 289         if ((s->nb_files != 1) && s->outfile) {
 290             tcc_error("cannot specify multiple files with -c and -o");
 291         }
 292     }
 293
 294     if (s->output_type == TCC_OUTPUT_PREPROCESS) {
 295         if (!s->outfile) {
 296             s->ppfp = stdout;
 297         } else {
 298             s->ppfp = fopen(s->outfile, "w");
 299             if (!s->ppfp)
 300                 tcc_error("could not write '%s'", s->outfile);
 301         }
 302     }
 303
 304     tcc_set_output_type(s, s->output_type);
 305
 306     /* compile or add each files or library */
 307     for(i = ret = 0; i < s->nb_files && ret == 0; i++) {
 308         int filetype = *(unsigned char *)s->files[i];
 309         const char *filename = s->files[i] + 1;
 310         if (filename[0] == '-' && filename[1] == 'l') {
 311             if (tcc_add_library(s, filename + 2) < 0) {
 312                 tcc_error_noabort("cannot find library 'lib%s'", filename+2);
 313                 ret = 1;
 314             }
 315         } else {
 316             if (1 == s->verbose)
 317                 printf("-> %s\n", filename);
 318             if (!s->outfile)
 319                 s->outfile = default_outputfile(s, filename);
 320             if (tcc_add_file(s, filename, filetype) < 0)
 321                 ret = 1;
 322             else
 323             if (s->output_type == TCC_OUTPUT_OBJ) {
 324                 ret = !!tcc_output_file(s, s->outfile);
 325                 if (s->gen_deps && !ret)
 326                     gen_makedeps(s, s->outfile, s->deps_outfile);
 327                 if (!ret) {
 328                     if ((i+1) < s->nb_files) {
 329                         tcc_delete(s);
 330                         s = tcc_new();
 331                         tcc_parse_args(s, argc - 1, argv + 1);
 332                         tcc_set_environment(s);
 333                         if (s->output_type != TCC_OUTPUT_OBJ)
 334                             tcc_error("interlnal error");
 335                         tcc_set_output_type(s, s->output_type);
 336                     }
 337                 }
 338             }
 339         }
 340     }
 341
 342     if (0 == ret) {
 343         if (s->output_type == TCC_OUTPUT_MEMORY) {
 344 #ifdef TCC_IS_NATIVE
 345             ret = tcc_run(s, argc - 1 - optind, argv + 1 + optind);
 346 #else
 347             tcc_error_noabort("-run is not available in a cross compiler");
 348             ret = 1;
 349 #endif
 350         } else
 351         if (s->output_type == TCC_OUTPUT_EXE ||
 352             s->output_type == TCC_OUTPUT_DLL)
 353         {
 354             ret = !!tcc_output_file(s, s->outfile);
 355             if (s->gen_deps && !ret)
 356                 gen_makedeps(s, s->outfile, s->deps_outfile);
 357         }
 358     }
 359
 360     if (s->do_bench)
 361         tcc_print_stats(s, getclock_us() - start_time);
 362
 363     tcc_delete(s);
 364     return ret;
 365 }