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