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            "  -dD         put a define directive in the output (inside a comment)\n"
  51            "Linker options:\n"
  52            "  -Ldir       add library path 'dir'\n"
  53            "  -llib       link with dynamic or static library 'lib'\n"
  54            "  -pthread    link with -lpthread and -D_REENTRANT (POSIX Linux)\n"
  55            "  -r          generate (relocatable) object file\n"
  56            "  -rdynamic   export all global symbols to dynamic linker\n"
  57            "  -shared     generate a shared library\n"
  58            "  -soname     set name for shared library to be used at runtime\n"
  59            "  -static     static linking\n"
  60            "  -Wl,-opt[=val]  set linker option (see manual)\n"
  61            "Debugger options:\n"
  62            "  -g          generate runtime debug info\n"
  63 #ifdef CONFIG_TCC_BCHECK
  64            "  -b          compile with built-in memory and bounds checker (implies -g)\n"
  65 #endif
  66 #ifdef CONFIG_TCC_BACKTRACE
  67            "  -bt N       show N callers in stack traces\n"
  68 #endif
  69            "Misc options:\n"
  70            "  -nostdinc   do not use standard system include paths\n"
  71            "  -nostdlib   do not link with standard crt and libraries\n"
  72            "  -Bdir       use 'dir' as tcc internal library and include path\n"
  73            "  -MD         generate target dependencies for make\n"
  74            "  -MF depfile put generated dependencies here\n"
  75            );
  76 }
  77
  78 /* re-execute the i386/x86_64 cross-compilers with tcc -m32/-m64: */
  79 #if defined TCC_TARGET_I386 || defined TCC_TARGET_X86_64
  80 #ifdef _WIN32
  81 #include <process.h>
  82 static int execvp_win32(const char *prog, char **argv)
  83 {
  84     int ret = spawnvp(P_NOWAIT, prog, (const char *const*)argv);
  85     if (-1 == ret)
  86         return ret;
  87     cwait(&ret, ret, WAIT_CHILD);
  88     exit(ret);
  89 }
  90 #define execvp execvp_win32
  91 #endif
  92 static void exec_other_tcc(TCCState *s, char **argv, const char *optarg)
  93 {
  94     char child_path[4096], *child_name; const char *target;
  95     switch (atoi(optarg)) {
  96 #ifdef TCC_TARGET_I386
  97         case 32: break;
  98         case 64: target = "x86_64";
  99 #else
 100         case 64: break;
 101         case 32: target = "i386";
 102 #endif
 103             pstrcpy(child_path, sizeof child_path - 40, argv[0]);
 104             child_name = tcc_basename(child_path);
 105             strcpy(child_name, target);
 106 #ifdef TCC_TARGET_PE
 107             strcat(child_name, "-win32");
 108 #endif
 109             strcat(child_name, "-tcc");
 110             if (strcmp(argv[0], child_path)) {
 111                 if (s->verbose > 0)
 112                     printf("tcc: using '%s'\n", child_name), fflush(stdout);
 113                 execvp(argv[0] = child_path, argv);
 114             }
 115             tcc_error("'%s' not found", child_name);
 116         case 0: /* ignore -march etc. */
 117             break;
 118         default:
 119             tcc_warning("unsupported option \"-m%s\"", optarg);
 120     }
 121 }
 122 #else
 123 #define exec_other_tcc(s, argv, optarg)
 124 #endif
 125
 126 static void gen_makedeps(TCCState *s, const char *target, const char *filename)
 127 {
 128     FILE *depout;
 129     char buf[1024], *ext;
 130     int i;
 131
 132     if (!filename) {
 133         /* compute filename automatically
 134          * dir/file.o -> dir/file.d             */
 135         pstrcpy(buf, sizeof(buf), target);
 136         ext = tcc_fileextension(buf);
 137         pstrcpy(ext, sizeof(buf) - (ext-buf), ".d");
 138         filename = buf;
 139     }
 140
 141     if (s->verbose)
 142         printf("<- %s\n", filename);
 143
 144     /* XXX return err codes instead of error() ? */
 145     depout = fopen(filename, "w");
 146     if (!depout)
 147         tcc_error("could not open '%s'", filename);
 148
 149     fprintf(depout, "%s : \\\n", target);
 150     for (i=0; i<s->nb_target_deps; ++i)
 151         fprintf(depout, " %s \\\n", s->target_deps[i]);
 152     fprintf(depout, "\n");
 153     fclose(depout);
 154 }
 155
 156 static char *default_outputfile(TCCState *s, const char *first_file)
 157 {
 158     char buf[1024];
 159     char *ext;
 160     const char *name = "a";
 161
 162     if (first_file && strcmp(first_file, "-"))
 163         name = tcc_basename(first_file);
 164     pstrcpy(buf, sizeof(buf), name);
 165     ext = tcc_fileextension(buf);
 166 #ifdef TCC_TARGET_PE
 167     if (s->output_type == TCC_OUTPUT_DLL)
 168         strcpy(ext, ".dll");
 169     else
 170     if (s->output_type == TCC_OUTPUT_EXE)
 171         strcpy(ext, ".exe");
 172     else
 173 #endif
 174     if (( (s->output_type == TCC_OUTPUT_OBJ && !s->option_r) ||
 175           (s->output_type == TCC_OUTPUT_PREPROCESS) )
 176         && *ext)
 177         strcpy(ext, ".o");
 178     else
 179         strcpy(buf, "a.out");
 180
 181     return tcc_strdup(buf);
 182 }
 183
 184 static void print_paths(const char *msg, char **paths, int nb_paths)
 185 {
 186     int i;
 187     printf("%s:\n%s", msg, nb_paths ? "" : "  -\n");
 188     for(i = 0; i < nb_paths; i++)
 189         printf("  %s\n", paths[i]);
 190 }
 191
 192 static void display_info(TCCState *s, int what)
 193 {
 194     switch (what) {
 195     case 0:
 196         printf("tcc version %s ("
 197 #ifdef TCC_TARGET_I386
 198         "i386"
 199 # ifdef TCC_TARGET_PE
 200         " Win32"
 201 # endif
 202 #elif defined TCC_TARGET_X86_64
 203         "x86-64"
 204 # ifdef TCC_TARGET_PE
 205         " Win64"
 206 # endif
 207 #elif defined TCC_TARGET_ARM
 208         "ARM"
 209 #elif defined TCC_TARGET_ARM64
 210         "AArch64"
 211 # ifdef TCC_ARM_HARDFLOAT
 212         " Hard Float"
 213 # endif
 214 # ifdef TCC_TARGET_PE
 215         " WinCE"
 216 # endif
 217 #endif
 218 #ifndef TCC_TARGET_PE
 219 # ifdef __linux
 220         " Linux"
 221 # endif
 222 #endif
 223         ")\n", TCC_VERSION);
 224         break;
 225     case 1:
 226         printf("install: %s/\n", s->tcc_lib_path);
 227         /* print_paths("programs", NULL, 0); */
 228         print_paths("crt", s->crt_paths, s->nb_crt_paths);
 229         print_paths("libraries", s->library_paths, s->nb_library_paths);
 230         print_paths("include", s->sysinclude_paths, s->nb_sysinclude_paths);
 231         printf("elfinterp:\n  %s\n",  DEFAULT_ELFINTERP(s));
 232         break;
 233     }
 234 }
 235
 236 static int64_t getclock_us(void)
 237 {
 238 #ifdef _WIN32
 239     struct _timeb tb;
 240     _ftime(&tb);
 241     return (tb.time * 1000LL + tb.millitm) * 1000LL;
 242 #else
 243     struct timeval tv;
 244     gettimeofday(&tv, NULL);
 245     return tv.tv_sec * 1000000LL + tv.tv_usec;
 246 #endif
 247 }
 248
 249 int main(int argc, char **argv)
 250 {
 251     TCCState *s;
 252     int ret, optind, i, bench;
 253     int64_t start_time = 0;
 254     const char *first_file = NULL;
 255
 256     s = tcc_new();
 257
 258     optind = tcc_parse_args(s, argc - 1, argv + 1);
 259     tcc_set_environment(s);
 260
 261     if (optind == 0) {
 262         help();
 263         return 1;
 264     }
 265
 266     if (s->output_type == 0)
 267         s->output_type = TCC_OUTPUT_EXE;
 268
 269     if (s->option_m)
 270         exec_other_tcc(s, argv, s->option_m);
 271
 272     if (s->verbose)
 273         display_info(s, 0);
 274
 275     if (s->print_search_dirs || (s->verbose == 2 && optind == 1)) {
 276         tcc_set_output_type(s, TCC_OUTPUT_MEMORY);
 277         display_info(s, 1);
 278         return 0;
 279     }
 280
 281     if (s->verbose && optind == 1)
 282         return 0;
 283
 284     if (s->nb_files == 0)
 285         tcc_error("no input files\n");
 286
 287     /* check -c consistency : only single file handled. XXX: checks file type */
 288     if (s->output_type == TCC_OUTPUT_OBJ && !s->option_r) {
 289         if (s->nb_libraries != 0)
 290             tcc_error("cannot specify libraries with -c");
 291         /* accepts only a single input file */
 292         if (s->nb_files != 1)
 293             tcc_error("cannot specify multiple files with -c");
 294     }
 295
 296     if (s->output_type == TCC_OUTPUT_PREPROCESS) {
 297         if (!s->outfile) {
 298             s->ppfp = stdout;
 299         } else {
 300             s->ppfp = fopen(s->outfile, "w");
 301             if (!s->ppfp)
 302                 tcc_error("could not write '%s'", s->outfile);
 303         }
 304     }
 305
 306     bench = s->do_bench;
 307     if (bench)
 308         start_time = getclock_us();
 309
 310     tcc_set_output_type(s, s->output_type);
 311     if (s->output_type == TCC_OUTPUT_PREPROCESS)
 312         print_defines();
 313
 314     /* compile or add each files or library */
 315     for(i = ret = 0; i < s->nb_files && ret == 0; i++) {
 316         const char *filename;
 317
 318         filename = s->files[i];
 319         if (filename[0] == '-' && filename[1] == 'l') {
 320             if (tcc_add_library(s, filename + 2) < 0) {
 321                 tcc_error_noabort("cannot find '%s'", filename);
 322                 ret = 1;
 323             }
 324         } else {
 325             if (1 == s->verbose)
 326                 printf("-> %s\n", filename);
 327             if (tcc_add_file(s, filename) < 0)
 328                 ret = 1;
 329             if (!first_file)
 330                 first_file = filename;
 331         }
 332     }
 333
 334     if (0 == ret) {
 335         if (bench)
 336             tcc_print_stats(s, getclock_us() - start_time);
 337
 338         if (s->output_type == TCC_OUTPUT_MEMORY) {
 339 #ifdef TCC_IS_NATIVE
 340             ret = tcc_run(s, argc - 1 - optind, argv + 1 + optind);
 341 #else
 342             tcc_error_noabort("-run is not available in a cross compiler");
 343             ret = 1;
 344 #endif
 345         } else if (s->output_type == TCC_OUTPUT_PREPROCESS) {
 346              if (s->outfile)
 347                 fclose(s->ppfp);
 348         } else {
 349             if (!s->outfile)
 350                 s->outfile = default_outputfile(s, first_file);
 351             ret = !!tcc_output_file(s, s->outfile);
 352             /* dump collected dependencies */
 353             if (s->gen_deps && !ret)
 354                 gen_makedeps(s, s->outfile, s->deps_outfile);
 355         }
 356     }
 357
 358     tcc_delete(s);
 359     if (bench)
 360         tcc_memstats();
 361     return ret;
 362 }