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 help(void)
  28 {
  29     printf("tcc version " TCC_VERSION " - Tiny C Compiler - 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 man page)\n"
  37            "  -Wwarning   set or reset (with 'no-' prefix) 'warning' (see man page)\n"
  38            "  -w          disable all warnings\n"
  39            "  -v          show version\n"
  40            "  -vv         show included files (as sole argument: show search paths)\n"
  41            "  -dumpversion\n"
  42            "  -bench      show compilation statistics\n"
  43            "Preprocessor options:\n"
  44            "  -E          preprocess only\n"
  45            "  -Idir       add include path 'dir'\n"
  46            "  -Dsym[=val] define 'sym' with value 'val'\n"
  47            "  -Usym       undefine 'sym'\n"
  48            "  -P          do not output a #line directive\n"
  49            "  -P1         use a #line directive in output instead of the gcc style\n"
  50            "Linker options:\n"
  51            "  -Ldir       add library path 'dir'\n"
  52            "  -llib       link with dynamic or static library 'lib'\n"
  53            "  -pthread    link with -lpthread and -D_REENTRANT (POSIX Linux)\n"
  54            "  -r          generate (relocatable) object file\n"
  55            "  -rdynamic   export all global symbols to dynamic linker\n"
  56            "  -shared     generate a shared library\n"
  57            "  -soname     set name for shared library to be used at runtime\n"
  58            "  -static     static linking\n"
  59            "  -Wl,-opt[=val]  set linker option (see manual)\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       show N callers in stack traces\n"
  67 #endif
  68            "Misc options:\n"
  69            "  -nostdinc   do not use standard system include paths\n"
  70            "  -nostdlib   do not link with standard crt and libraries\n"
  71            "  -Bdir       use 'dir' as tcc internal library and include path\n"
  72            "  -MD         generate target dependencies for make\n"
  73            "  -MF depfile put generated dependencies here\n"
  74            );
  75 }
  76
  77 /* re-execute the i386/x86_64 cross-compilers with tcc -m32/-m64: */
  78 #if defined TCC_TARGET_I386 || defined TCC_TARGET_X86_64
  79 #ifdef _WIN32
  80 #include <process.h>
  81 static int execvp_win32(const char *prog, char **argv)
  82 {
  83     int ret = spawnvp(P_NOWAIT, prog, (const char *const*)argv);
  84     if (-1 == ret)
  85         return ret;
  86     cwait(&ret, ret, WAIT_CHILD);
  87     exit(ret);
  88 }
  89 #define execvp execvp_win32
  90 #endif
  91 static void exec_other_tcc(TCCState *s, char **argv, const char *optarg)
  92 {
  93     char child_path[4096], *child_name; const char *target;
  94     switch (atoi(optarg)) {
  95 #ifdef TCC_TARGET_I386
  96         case 32: break;
  97         case 64: target = "x86_64";
  98 #else
  99         case 64: break;
 100         case 32: target = "i386";
 101 #endif
 102             pstrcpy(child_path, sizeof child_path - 40, argv[0]);
 103             child_name = tcc_basename(child_path);
 104             strcpy(child_name, target);
 105 #ifdef TCC_TARGET_PE
 106             strcat(child_name, "-win32");
 107 #endif
 108             strcat(child_name, "-tcc");
 109             if (strcmp(argv[0], child_path)) {
 110                 if (s->verbose > 0)
 111                     printf("tcc: using '%s'\n", child_name), fflush(stdout);
 112                 execvp(argv[0] = child_path, argv);
 113             }
 114             tcc_error("'%s' not found", child_name);
 115         case 0: /* ignore -march etc. */
 116             break;
 117         default:
 118             tcc_warning("unsupported option \"-m%s\"", optarg);
 119     }
 120 }
 121 #else
 122 #define exec_other_tcc(s, argv, optarg)
 123 #endif
 124
 125 static void gen_makedeps(TCCState *s, const char *target, const char *filename)
 126 {
 127     FILE *depout;
 128     char buf[1024], *ext;
 129     int i;
 130
 131     if (!filename) {
 132         /* compute filename automatically
 133          * dir/file.o -> dir/file.d             */
 134         pstrcpy(buf, sizeof(buf), target);
 135         ext = tcc_fileextension(buf);
 136         pstrcpy(ext, sizeof(buf) - (ext-buf), ".d");
 137         filename = buf;
 138     }
 139
 140     if (s->verbose)
 141         printf("<- %s\n", filename);
 142
 143     /* XXX return err codes instead of error() ? */
 144     depout = fopen(filename, "w");
 145     if (!depout)
 146         tcc_error("could not open '%s'", filename);
 147
 148     fprintf(depout, "%s : \\\n", target);
 149     for (i=0; i<s->nb_target_deps; ++i)
 150         fprintf(depout, " %s \\\n", s->target_deps[i]);
 151     fprintf(depout, "\n");
 152     fclose(depout);
 153 }
 154
 155 static char *default_outputfile(TCCState *s, const char *first_file)
 156 {
 157     char buf[1024];
 158     char *ext;
 159     const char *name = "a";
 160
 161     if (first_file && strcmp(first_file, "-"))
 162         name = tcc_basename(first_file);
 163     pstrcpy(buf, sizeof(buf), name);
 164     ext = tcc_fileextension(buf);
 165 #ifdef TCC_TARGET_PE
 166     if (s->output_type == TCC_OUTPUT_DLL)
 167         strcpy(ext, ".dll");
 168     else
 169     if (s->output_type == TCC_OUTPUT_EXE)
 170         strcpy(ext, ".exe");
 171     else
 172 #endif
 173     if (( (s->output_type == TCC_OUTPUT_OBJ && !s->option_r) ||
 174           (s->output_type == TCC_OUTPUT_PREPROCESS) )
 175         && *ext)
 176         strcpy(ext, ".o");
 177     else
 178         strcpy(buf, "a.out");
 179
 180     return tcc_strdup(buf);
 181 }
 182
 183 static void print_paths(const char *msg, char **paths, int nb_paths)
 184 {
 185     int i;
 186     printf("%s:\n%s", msg, nb_paths ? "" : "  -\n");
 187     for(i = 0; i < nb_paths; i++)
 188         printf("  %s\n", paths[i]);
 189 }
 190
 191 static void display_info(TCCState *s, int what)
 192 {
 193     switch (what) {
 194     case 0:
 195         printf("tcc version %s ("
 196 #ifdef TCC_TARGET_I386
 197         "i386"
 198 # ifdef TCC_TARGET_PE
 199         " Win32"
 200 # endif
 201 #elif defined TCC_TARGET_X86_64
 202         "x86-64"
 203 # ifdef TCC_TARGET_PE
 204         " Win64"
 205 # endif
 206 #elif defined TCC_TARGET_ARM
 207         "ARM"
 208 #elif defined TCC_TARGET_ARM64
 209         "AArch64"
 210 # ifdef TCC_ARM_HARDFLOAT
 211         " Hard Float"
 212 # endif
 213 # ifdef TCC_TARGET_PE
 214         " WinCE"
 215 # endif
 216 #endif
 217 #ifndef TCC_TARGET_PE
 218 # ifdef __linux
 219         " Linux"
 220 # endif
 221 #endif
 222         ")\n", TCC_VERSION);
 223         break;
 224     case 1:
 225         printf("install: %s/\n", s->tcc_lib_path);
 226         /* print_paths("programs", NULL, 0); */
 227         print_paths("crt", s->crt_paths, s->nb_crt_paths);
 228         print_paths("libraries", s->library_paths, s->nb_library_paths);
 229         print_paths("include", s->sysinclude_paths, s->nb_sysinclude_paths);
 230         printf("elfinterp:\n  %s\n",  DEFAULT_ELFINTERP(s));
 231         break;
 232     }
 233 }
 234
 235 static int64_t getclock_us(void)
 236 {
 237 #ifdef _WIN32
 238     struct _timeb tb;
 239     _ftime(&tb);
 240     return (tb.time * 1000LL + tb.millitm) * 1000LL;
 241 #else
 242     struct timeval tv;
 243     gettimeofday(&tv, NULL);
 244     return tv.tv_sec * 1000000LL + tv.tv_usec;
 245 #endif
 246 }
 247
 248 int main(int argc, char **argv)
 249 {
 250     TCCState *s;
 251     int ret, optind, i, bench;
 252     int64_t start_time = 0;
 253     const char *first_file = NULL;
 254
 255     s = tcc_new();
 256
 257     optind = tcc_parse_args(s, argc - 1, argv + 1);
 258     tcc_set_environment(s);
 259
 260     if (optind == 0) {
 261         help();
 262         return 1;
 263     }
 264
 265     if (s->output_type == 0)
 266         s->output_type = TCC_OUTPUT_EXE;
 267
 268     if (s->option_m)
 269         exec_other_tcc(s, argv, s->option_m);
 270
 271     if (s->verbose)
 272         display_info(s, 0);
 273
 274     if (s->print_search_dirs || (s->verbose == 2 && optind == 1)) {
 275         tcc_set_output_type(s, TCC_OUTPUT_MEMORY);
 276         display_info(s, 1);
 277         return 0;
 278     }
 279
 280     if (s->verbose && optind == 1)
 281         return 0;
 282
 283     if (s->nb_files == 0)
 284         tcc_error("no input files\n");
 285
 286     /* check -c consistency : only single file handled. XXX: checks file type */
 287     if (s->output_type == TCC_OUTPUT_OBJ && !s->option_r) {
 288         if (s->nb_libraries != 0)
 289             tcc_error("cannot specify libraries with -c");
 290         /* accepts only a single input file */
 291         if (s->nb_files != 1)
 292             tcc_error("cannot specify multiple files with -c");
 293     }
 294
 295     if (s->output_type == TCC_OUTPUT_PREPROCESS) {
 296         if (!s->outfile) {
 297             s->ppfp = stdout;
 298         } else {
 299             s->ppfp = fopen(s->outfile, "w");
 300             if (!s->ppfp)
 301                 tcc_error("could not write '%s'", s->outfile);
 302         }
 303     }
 304
 305     bench = s->do_bench;
 306     if (bench)
 307         start_time = getclock_us();
 308
 309     tcc_set_output_type(s, s->output_type);
 310
 311     /* compile or add each files or library */
 312     for(i = ret = 0; i < s->nb_files && ret == 0; i++) {
 313         const char *filename;
 314
 315         filename = s->files[i];
 316         if (filename[0] == '-' && filename[1] == 'l') {
 317             if (tcc_add_library(s, filename + 2) < 0) {
 318                 tcc_error_noabort("cannot find '%s'", filename);
 319                 ret = 1;
 320             }
 321         } else {
 322             if (1 == s->verbose)
 323                 printf("-> %s\n", filename);
 324             if (tcc_add_file(s, filename) < 0)
 325                 ret = 1;
 326             if (!first_file)
 327                 first_file = filename;
 328         }
 329     }
 330
 331     if (0 == ret) {
 332         if (bench)
 333             tcc_print_stats(s, getclock_us() - start_time);
 334
 335         if (s->output_type == TCC_OUTPUT_MEMORY) {
 336 #ifdef TCC_IS_NATIVE
 337             ret = tcc_run(s, argc - 1 - optind, argv + 1 + optind);
 338 #else
 339             tcc_error_noabort("-run is not available in a cross compiler");
 340             ret = 1;
 341 #endif
 342         } else if (s->output_type == TCC_OUTPUT_PREPROCESS) {
 343              if (s->outfile)
 344                 fclose(s->ppfp);
 345         } else {
 346             if (!s->outfile)
 347                 s->outfile = default_outputfile(s, first_file);
 348             ret = !!tcc_output_file(s, s->outfile);
 349             /* dump collected dependencies */
 350             if (s->gen_deps && !ret)
 351                 gen_makedeps(s, s->outfile, s->deps_outfile);
 352         }
 353     }
 354
 355     tcc_delete(s);
 356     if (bench)
 357         tcc_memstats();
 358     return ret;
 359 }