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 #elif defined(__APPLE__)
  60         /* Current Apple OS name as of 2016 */
  61         " macOS"
  62 #elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
  63         " FreeBSD"
  64 #elif defined(__DragonFly__)
  65         " DragonFly BSD"
  66 #elif defined(__NetBSD__)
  67         " NetBSD"
  68 #elif defined(__OpenBSD__)
  69         " OpenBSD"
  70 #elif defined(__linux__)
  71         " Linux"
  72 #else
  73         " Unidentified system"
  74 #endif
  75         ")\n", TCC_VERSION);
  76         break;
  77     case 1:
  78         printf("install: %s\n", s->tcc_lib_path);
  79         /* print_paths("programs", NULL, 0); */
  80         print_paths("include", s->sysinclude_paths, s->nb_sysinclude_paths);
  81         print_paths("libraries", s->library_paths, s->nb_library_paths);
  82 #ifndef TCC_TARGET_PE
  83         print_paths("crt", s->crt_paths, s->nb_crt_paths);
  84         printf("elfinterp:\n  %s\n",  DEFAULT_ELFINTERP(s));
  85 #endif
  86         break;
  87     }
  88 }
  89
  90 static void help(void)
  91 {
  92     printf("Tiny C Compiler "TCC_VERSION" - Copyright (C) 2001-2006 Fabrice Bellard\n"
  93            "Usage: tcc [options...] [-o outfile] [-c] infile(s)...\n"
  94            "       tcc [options...] -run infile [arguments...]\n"
  95            "General options:\n"
  96            "  -c          compile only - generate an object file\n"
  97            "  -o outfile  set output filename\n"
  98            "  -run        run compiled source\n"
  99            "  -fflag      set or reset (with 'no-' prefix) 'flag' (see man page)\n"
 100            "  -Wwarning   set or reset (with 'no-' prefix) 'warning' (see man page)\n"
 101            "  -w          disable all warnings\n"
 102            "  -v          show version\n"
 103            "  -vv         show included files (as sole argument: show search paths)\n"
 104            "  -dumpversion\n"
 105            "  -bench      show compilation statistics\n"
 106            "  -xc -xa     specify type of the next infile\n"
 107            "  -           use stdin pipe as infile\n"
 108            "  @listfile   read arguments from listfile\n"
 109            "Preprocessor options:\n"
 110            "  -Idir       add include path 'dir'\n"
 111            "  -Dsym[=val] define 'sym' with value 'val'\n"
 112            "  -Usym       undefine 'sym'\n"
 113            "  -E          preprocess only\n"
 114            "  -P[1]       no / alternative #line output with -E\n"
 115            "  -dD -dM     output #define directives with -E\n"
 116            "Linker options:\n"
 117            "  -Ldir       add library path 'dir'\n"
 118            "  -llib       link with dynamic or static library 'lib'\n"
 119            "  -pthread    link with -lpthread and -D_REENTRANT (POSIX Linux)\n"
 120            "  -r          generate (relocatable) object file\n"
 121            "  -rdynamic   export all global symbols to dynamic linker\n"
 122            "  -shared     generate a shared library\n"
 123            "  -soname     set name for shared library to be used at runtime\n"
 124            "  -static     static linking\n"
 125            "  -Wl,-opt[=val]  set linker option (see manual)\n"
 126            "Debugger options:\n"
 127            "  -g          generate runtime debug info\n"
 128 #ifdef CONFIG_TCC_BCHECK
 129            "  -b          compile with built-in memory and bounds checker (implies -g)\n"
 130 #endif
 131 #ifdef CONFIG_TCC_BACKTRACE
 132            "  -bt N       show N callers in stack traces\n"
 133 #endif
 134            "Misc options:\n"
 135            "  -nostdinc   do not use standard system include paths\n"
 136            "  -nostdlib   do not link with standard crt and libraries\n"
 137            "  -Bdir       use 'dir' as tcc internal library and include path\n"
 138            "  -MD         generate target dependencies for make\n"
 139            "  -MF depfile put generated dependencies here\n"
 140            );
 141 }
 142
 143 /* re-execute the i386/x86_64 cross-compilers with tcc -m32/-m64: */
 144 #if defined TCC_TARGET_I386 || defined TCC_TARGET_X86_64
 145 #ifdef _WIN32
 146 #include <process.h>
 147 static int execvp_win32(const char *prog, char **argv)
 148 {
 149     int ret = _spawnvp(P_NOWAIT, prog, (const char *const*)argv);
 150     if (-1 == ret)
 151         return ret;
 152     cwait(&ret, ret, WAIT_CHILD);
 153     exit(ret);
 154 }
 155 #define execvp execvp_win32
 156 #endif
 157 static void exec_other_tcc(TCCState *s, char **argv, const char *optarg)
 158 {
 159     char child_path[4096], *child_name; const char *target;
 160     switch (atoi(optarg)) {
 161 #ifdef TCC_TARGET_I386
 162         case 32: break;
 163         case 64: target = "x86_64";
 164 #else
 165         case 64: break;
 166         case 32: target = "i386";
 167 #endif
 168             pstrcpy(child_path, sizeof child_path - 40, argv[0]);
 169             child_name = tcc_basename(child_path);
 170             strcpy(child_name, target);
 171 #ifdef TCC_TARGET_PE
 172             strcat(child_name, "-win32");
 173 #endif
 174             strcat(child_name, "-tcc");
 175             if (strcmp(argv[0], child_path)) {
 176                 if (s->verbose > 0)
 177                     printf("tcc: using '%s'\n", child_name), fflush(stdout);
 178                 execvp(argv[0] = child_path, argv);
 179             }
 180             tcc_error("'%s' not found", child_name);
 181         case 0: /* ignore -march etc. */
 182             break;
 183         default:
 184             tcc_warning("unsupported option \"-m%s\"", optarg);
 185     }
 186 }
 187 #else
 188 #define exec_other_tcc(s, argv, optarg)
 189 #endif
 190
 191 static void gen_makedeps(TCCState *s, const char *target, const char *filename)
 192 {
 193     FILE *depout;
 194     char buf[1024], *ext;
 195     int i;
 196
 197     if (!filename) {
 198         /* compute filename automatically
 199          * dir/file.o -> dir/file.d             */
 200         pstrcpy(buf, sizeof(buf), target);
 201         ext = tcc_fileextension(buf);
 202         pstrcpy(ext, sizeof(buf) - (ext-buf), ".d");
 203         filename = buf;
 204     }
 205
 206     if (s->verbose)
 207         printf("<- %s\n", filename);
 208
 209     /* XXX return err codes instead of error() ? */
 210     depout = fopen(filename, "w");
 211     if (!depout)
 212         tcc_error("could not open '%s'", filename);
 213
 214     fprintf(depout, "%s : \\\n", target);
 215     for (i=0; i<s->nb_target_deps; ++i)
 216         fprintf(depout, " %s \\\n", s->target_deps[i]);
 217     fprintf(depout, "\n");
 218     fclose(depout);
 219 }
 220
 221 static char *default_outputfile(TCCState *s, const char *first_file)
 222 {
 223     char buf[1024];
 224     char *ext;
 225     const char *name = "a";
 226
 227     if (first_file && strcmp(first_file, "-"))
 228         name = tcc_basename(first_file);
 229     pstrcpy(buf, sizeof(buf), name);
 230     ext = tcc_fileextension(buf);
 231 #ifdef TCC_TARGET_PE
 232     if (s->output_type == TCC_OUTPUT_DLL)
 233         strcpy(ext, ".dll");
 234     else
 235     if (s->output_type == TCC_OUTPUT_EXE)
 236         strcpy(ext, ".exe");
 237     else
 238 #endif
 239     if (s->output_type == TCC_OUTPUT_OBJ && !s->option_r && *ext)
 240         strcpy(ext, ".o");
 241     else
 242         strcpy(buf, "a.out");
 243
 244     return tcc_strdup(buf);
 245 }
 246
 247 static unsigned getclock_ms(void)
 248 {
 249 #ifdef _WIN32
 250     return GetTickCount();
 251 #else
 252     struct timeval tv;
 253     gettimeofday(&tv, NULL);
 254     return tv.tv_sec*1000 + (tv.tv_usec+500)/1000;
 255 #endif
 256 }
 257
 258 int main(int argc, char **argv)
 259 {
 260     TCCState *s;
 261     int ret, optind, i;
 262     unsigned start_time = 0;
 263     const char *first_file = NULL;
 264
 265     s = tcc_new();
 266
 267     optind = tcc_parse_args(s, argc - 1, argv + 1);
 268
 269     tcc_set_environment(s);
 270
 271     if (optind == 0) {
 272         help();
 273         return 1;
 274     }
 275
 276     if (s->option_m)
 277         exec_other_tcc(s, argv, s->option_m);
 278
 279     if (s->verbose)
 280         display_info(s, 0);
 281
 282     if (s->nb_files == 0) {
 283         if (optind == 1) {
 284             if (s->print_search_dirs || s->verbose == 2) {
 285                 tcc_set_output_type(s, TCC_OUTPUT_MEMORY);
 286                 display_info(s, 1);
 287                 return 1;
 288             }
 289             if (s->verbose)
 290                 return 1;
 291         }
 292         tcc_error("no input files\n");
 293     }
 294
 295     /* check -c consistency : only single file handled. XXX: checks file type */
 296     if (s->output_type == TCC_OUTPUT_OBJ && !s->option_r) {
 297         if (s->nb_libraries != 0)
 298             tcc_error("cannot specify libraries with -c");
 299         /* accepts only a single input file */
 300         if (s->nb_files != 1)
 301             tcc_error("cannot specify multiple files with -c");
 302     }
 303
 304     if (s->output_type == 0)
 305         s->output_type = TCC_OUTPUT_EXE;
 306     tcc_set_output_type(s, s->output_type);
 307
 308     if (s->output_type == TCC_OUTPUT_PREPROCESS) {
 309         if (!s->outfile) {
 310             s->ppfp = stdout;
 311         } else {
 312             s->ppfp = fopen(s->outfile, "w");
 313             if (!s->ppfp)
 314                 tcc_error("could not write '%s'", s->outfile);
 315         }
 316     } else if (s->output_type != TCC_OUTPUT_OBJ) {
 317         if (s->option_pthread)
 318             tcc_set_options(s, "-lpthread");
 319     }
 320
 321     if (s->do_bench)
 322         start_time = getclock_ms();
 323
 324     /* compile or add each files or library */
 325     for(i = ret = 0; i < s->nb_files && ret == 0; i++) {
 326         struct filespec *f = s->files[i];
 327         if (f->type >= AFF_TYPE_LIB) {
 328             s->alacarte_link = f->type == AFF_TYPE_LIB;
 329             if (tcc_add_library_err(s, f->name) < 0)
 330                 ret = 1;
 331         } else {
 332             if (1 == s->verbose)
 333                 printf("-> %s\n", f->name);
 334             s->filetype = f->type;
 335             if (tcc_add_file(s, f->name) < 0)
 336                 ret = 1;
 337             if (!first_file)
 338                 first_file = f->name;
 339         }
 340         s->filetype = AFF_TYPE_NONE;
 341         s->alacarte_link = 1;
 342     }
 343
 344     if (s->output_type == TCC_OUTPUT_PREPROCESS) {
 345         if (s->outfile)
 346             fclose(s->ppfp);
 347
 348     } else if (0 == ret) {
 349         if (s->output_type == TCC_OUTPUT_MEMORY) {
 350 #ifdef TCC_IS_NATIVE
 351             ret = tcc_run(s, argc - 1 - optind, argv + 1 + optind);
 352 #endif
 353         } else {
 354             if (!s->outfile)
 355                 s->outfile = default_outputfile(s, first_file);
 356             ret = !!tcc_output_file(s, s->outfile);
 357             if (s->gen_deps && !ret)
 358                 gen_makedeps(s, s->outfile, s->deps_outfile);
 359         }
 360     }
 361
 362     if (s->do_bench)
 363         tcc_print_stats(s, getclock_ms() - start_time);
 364     tcc_delete(s);
 365     return ret;
 366 }