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         ", mingw"
  59 #else
  60  #ifdef __linux
  61         ", Linux"
  62  #else
  63         ", Unknown"
  64  #endif
  65 #endif
  66         ")\n", TCC_VERSION);
  67         break;
  68     case 1:
  69         printf("install: %s\n", s->tcc_lib_path);
  70         /* print_paths("programs", NULL, 0); */
  71         print_paths("crt", s->crt_paths, s->nb_crt_paths);
  72         print_paths("libraries", s->library_paths, s->nb_library_paths);
  73         print_paths("include", s->sysinclude_paths, s->nb_sysinclude_paths);
  74         printf("elfinterp:\n  %s\n",  DEFAULT_ELFINTERP(s));
  75         break;
  76     }
  77 }
  78
  79 static void help(TCCState *s)
  80 {
  81     display_info(s, 0);
  82     printf("Tiny C Compiler - Copyright (C) 2001-2006 Fabrice Bellard\n"
  83            "Usage: tcc [options...] [-o outfile] [-c] infile(s)...\n"
  84            "       tcc [options...] -run infile [arguments...]\n"
  85            "General options:\n"
  86            "  -c          compile only - generate an object file\n"
  87            "  -o outfile  set output filename\n"
  88            "  -run        run compiled source\n"
  89            "  -fflag      set or reset (with 'no-' prefix) 'flag' (see man page)\n"
  90            "  -Wwarning   set or reset (with 'no-' prefix) 'warning' (see man page)\n"
  91            "  -w          disable all warnings\n"
  92            "  -v          show version\n"
  93            "  -vv         show included files (as sole argument: show search paths)\n"
  94            "  -dumpversion\n"
  95            "  -bench      show compilation statistics\n"
  96            "Preprocessor options:\n"
  97            "  -E          preprocess only\n"
  98            "  -Idir       add include path 'dir'\n"
  99            "  -Dsym[=val] define 'sym' with value 'val'\n"
 100            "  -Usym       undefine 'sym'\n"
 101            "  -P          do not output a #line directive\n"
 102            "  -P1         use a #line directive in output instead of the gcc style\n"
 103            "  -dD         put a define directive in the output (inside a comment)\n"
 104            "Linker options:\n"
 105            "  -Ldir       add library path 'dir'\n"
 106            "  -llib       link with dynamic or static library 'lib'\n"
 107            "  -pthread    link with -lpthread and -D_REENTRANT (POSIX Linux)\n"
 108            "  -r          generate (relocatable) object file\n"
 109            "  -rdynamic   export all global symbols to dynamic linker\n"
 110            "  -shared     generate a shared library\n"
 111            "  -soname     set name for shared library to be used at runtime\n"
 112            "  -static     static linking\n"
 113            "  -Wl,-opt[=val]  set linker option (see manual)\n"
 114            "Debugger options:\n"
 115            "  -g          generate runtime debug info\n"
 116 #ifdef CONFIG_TCC_BCHECK
 117            "  -b          compile with built-in memory and bounds checker (implies -g)\n"
 118 #endif
 119 #ifdef CONFIG_TCC_BACKTRACE
 120            "  -bt N       show N callers in stack traces\n"
 121 #endif
 122            "Misc options:\n"
 123            "  -nostdinc   do not use standard system include paths\n"
 124            "  -nostdlib   do not link with standard crt and libraries\n"
 125            "  -Bdir       use 'dir' as tcc internal library and include path\n"
 126            "  -MD         generate target dependencies for make\n"
 127            "  -MF depfile put generated dependencies here\n"
 128            );
 129 }
 130
 131 /* re-execute the i386/x86_64 cross-compilers with tcc -m32/-m64: */
 132 #if defined TCC_TARGET_I386 || defined TCC_TARGET_X86_64
 133 #ifdef _WIN32
 134 #include <process.h>
 135 static int execvp_win32(const char *prog, char **argv)
 136 {
 137     int ret = spawnvp(P_NOWAIT, prog, (const char *const*)argv);
 138     if (-1 == ret)
 139         return ret;
 140     cwait(&ret, ret, WAIT_CHILD);
 141     exit(ret);
 142 }
 143 #define execvp execvp_win32
 144 #endif
 145 static void exec_other_tcc(TCCState *s, char **argv, const char *optarg)
 146 {
 147     char child_path[4096], *child_name; const char *target;
 148     switch (atoi(optarg)) {
 149 #ifdef TCC_TARGET_I386
 150         case 32: break;
 151         case 64: target = "x86_64";
 152 #else
 153         case 64: break;
 154         case 32: target = "i386";
 155 #endif
 156             pstrcpy(child_path, sizeof child_path - 40, argv[0]);
 157             child_name = tcc_basename(child_path);
 158             strcpy(child_name, target);
 159 #ifdef TCC_TARGET_PE
 160             strcat(child_name, "-win32");
 161 #endif
 162             strcat(child_name, "-tcc");
 163             if (strcmp(argv[0], child_path)) {
 164                 if (s->verbose > 0)
 165                     printf("tcc: using '%s'\n", child_name), fflush(stdout);
 166                 execvp(argv[0] = child_path, argv);
 167             }
 168             tcc_error("'%s' not found", child_name);
 169         case 0: /* ignore -march etc. */
 170             break;
 171         default:
 172             tcc_warning("unsupported option \"-m%s\"", optarg);
 173     }
 174 }
 175 #else
 176 #define exec_other_tcc(s, argv, optarg)
 177 #endif
 178
 179 static void gen_makedeps(TCCState *s, const char *target, const char *filename)
 180 {
 181     FILE *depout;
 182     char buf[1024], *ext;
 183     int i;
 184
 185     if (!filename) {
 186         /* compute filename automatically
 187          * dir/file.o -> dir/file.d             */
 188         pstrcpy(buf, sizeof(buf), target);
 189         ext = tcc_fileextension(buf);
 190         pstrcpy(ext, sizeof(buf) - (ext-buf), ".d");
 191         filename = buf;
 192     }
 193
 194     if (s->verbose)
 195         printf("<- %s\n", filename);
 196
 197     /* XXX return err codes instead of error() ? */
 198     depout = fopen(filename, "w");
 199     if (!depout)
 200         tcc_error("could not open '%s'", filename);
 201
 202     fprintf(depout, "%s : \\\n", target);
 203     for (i=0; i<s->nb_target_deps; ++i)
 204         fprintf(depout, " %s \\\n", s->target_deps[i]);
 205     fprintf(depout, "\n");
 206     fclose(depout);
 207 }
 208
 209 static char *default_outputfile(TCCState *s, const char *first_file)
 210 {
 211     char buf[1024];
 212     char *ext;
 213     const char *name = "a";
 214
 215     if (first_file && strcmp(first_file, "-"))
 216         name = tcc_basename(first_file);
 217     pstrcpy(buf, sizeof(buf), name);
 218     ext = tcc_fileextension(buf);
 219 #ifdef TCC_TARGET_PE
 220     if (s->output_type == TCC_OUTPUT_DLL)
 221         strcpy(ext, ".dll");
 222     else
 223     if (s->output_type == TCC_OUTPUT_EXE)
 224         strcpy(ext, ".exe");
 225     else
 226 #endif
 227     if (( (s->output_type == TCC_OUTPUT_OBJ && !s->option_r) ||
 228           (s->output_type == TCC_OUTPUT_PREPROCESS) )
 229         && *ext)
 230         strcpy(ext, ".o");
 231     else
 232         strcpy(buf, "a.out");
 233
 234     return tcc_strdup(buf);
 235 }
 236
 237 static int64_t getclock_us(void)
 238 {
 239 #ifdef _WIN32
 240     struct _timeb tb;
 241     _ftime(&tb);
 242     return (tb.time * 1000LL + tb.millitm) * 1000LL;
 243 #else
 244     struct timeval tv;
 245     gettimeofday(&tv, NULL);
 246     return tv.tv_sec * 1000000LL + tv.tv_usec;
 247 #endif
 248 }
 249
 250 int main(int argc, char **argv)
 251 {
 252     TCCState *s;
 253     int ret, optind, i, bench;
 254     int64_t start_time = 0;
 255     const char *first_file = NULL;
 256
 257     s = tcc_new();
 258
 259     optind = tcc_parse_args(s, argc - 1, argv + 1);
 260     tcc_set_environment(s);
 261
 262     if (optind == 0) {
 263         help(s);
 264         return 1;
 265     }
 266
 267     if (s->output_type == 0)
 268         s->output_type = TCC_OUTPUT_EXE;
 269
 270     if (s->option_m)
 271         exec_other_tcc(s, argv, s->option_m);
 272
 273     if (s->verbose)
 274         display_info(s, 0);
 275
 276     if (s->print_search_dirs || (s->verbose == 2 && optind == 1)) {
 277         tcc_set_output_type(s, TCC_OUTPUT_MEMORY);
 278         display_info(s, 1);
 279         return 0;
 280     }
 281
 282     if (s->verbose && optind == 1)
 283         return 0;
 284
 285     if (s->nb_files == 0)
 286         tcc_error("no input files\n");
 287
 288     /* check -c consistency : only single file handled. XXX: checks file type */
 289     if (s->output_type == TCC_OUTPUT_OBJ && !s->option_r) {
 290         if (s->nb_libraries != 0)
 291             tcc_error("cannot specify libraries with -c");
 292         /* accepts only a single input file */
 293         if (s->nb_files != 1)
 294             tcc_error("cannot specify multiple files with -c");
 295     }
 296
 297     if (s->output_type == TCC_OUTPUT_PREPROCESS) {
 298         if (!s->outfile) {
 299             s->ppfp = stdout;
 300         } else {
 301             s->ppfp = fopen(s->outfile, "w");
 302             if (!s->ppfp)
 303                 tcc_error("could not write '%s'", s->outfile);
 304         }
 305     }
 306
 307     bench = s->do_bench;
 308     if (bench)
 309         start_time = getclock_us();
 310
 311     tcc_set_output_type(s, s->output_type);
 312     if (s->output_type == TCC_OUTPUT_PREPROCESS)
 313         print_defines();
 314
 315     /* compile or add each files or library */
 316     for(i = ret = 0; i < s->nb_files && ret == 0; i++) {
 317         const char *filename;
 318
 319         filename = s->files[i];
 320         if (filename[0] == '-' && filename[1] == 'l') {
 321             if (tcc_add_library(s, filename + 2) < 0) {
 322                 tcc_error_noabort("cannot find '%s'", filename);
 323                 ret = 1;
 324             }
 325         } else {
 326             if (1 == s->verbose)
 327                 printf("-> %s\n", filename);
 328             if (tcc_add_file(s, filename) < 0)
 329                 ret = 1;
 330             if (!first_file)
 331                 first_file = filename;
 332         }
 333     }
 334
 335     if (0 == ret) {
 336         if (bench)
 337             tcc_print_stats(s, getclock_us() - start_time);
 338
 339         if (s->output_type == TCC_OUTPUT_MEMORY) {
 340 #ifdef TCC_IS_NATIVE
 341             ret = tcc_run(s, argc - 1 - optind, argv + 1 + optind);
 342 #else
 343             tcc_error_noabort("-run is not available in a cross compiler");
 344             ret = 1;
 345 #endif
 346         } else if (s->output_type == TCC_OUTPUT_PREPROCESS) {
 347              if (s->outfile)
 348                 fclose(s->ppfp);
 349         } else {
 350             if (!s->outfile)
 351                 s->outfile = default_outputfile(s, first_file);
 352             ret = !!tcc_output_file(s, s->outfile);
 353             /* dump collected dependencies */
 354             if (s->gen_deps && !ret)
 355                 gen_makedeps(s, s->outfile, s->deps_outfile);
 356         }
 357     }
 358
 359     tcc_delete(s);
 360     if (bench)
 361         tcc_memstats();
 362     return ret;
 363 }