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