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            "  -mms-bitfields  use bitfield alignment consistent with MSVC\n"
 101            "  -Wwarning   set or reset (with 'no-' prefix) 'warning' (see man page)\n"
 102            "  -w          disable all warnings\n"
 103            "  -v          show version\n"
 104            "  -vv         show included files (as sole argument: show search paths)\n"
 105            "  -dumpversion\n"
 106            "  -bench      show compilation statistics\n"
 107            "  -xc -xa     specify type of the next infile\n"
 108            "  -           use stdin pipe as infile\n"
 109            "  @listfile   read arguments from listfile\n"
 110            "Preprocessor options:\n"
 111            "  -Idir       add include path 'dir'\n"
 112            "  -Dsym[=val] define 'sym' with value 'val'\n"
 113            "  -Usym       undefine 'sym'\n"
 114            "  -E          preprocess only\n"
 115            "  -P[1]       no / alternative #line output with -E\n"
 116            "  -dD -dM     output #define directives with -E\n"
 117            "Linker options:\n"
 118            "  -Ldir       add library path 'dir'\n"
 119            "  -llib       link with dynamic or static library 'lib'\n"
 120            "  -pthread    link with -lpthread and -D_REENTRANT (POSIX Linux)\n"
 121            "  -r          generate (relocatable) object file\n"
 122            "  -rdynamic   export all global symbols to dynamic linker\n"
 123            "  -shared     generate a shared library\n"
 124            "  -soname     set name for shared library to be used at runtime\n"
 125            "  -static     static linking\n"
 126            "  -Wl,-opt[=val]  set linker option (see manual)\n"
 127            "Debugger options:\n"
 128            "  -g          generate runtime debug info\n"
 129 #ifdef CONFIG_TCC_BCHECK
 130            "  -b          compile with built-in memory and bounds checker (implies -g)\n"
 131 #endif
 132 #ifdef CONFIG_TCC_BACKTRACE
 133            "  -bt N       show N callers in stack traces\n"
 134 #endif
 135            "Misc options:\n"
 136            "  -nostdinc   do not use standard system include paths\n"
 137            "  -nostdlib   do not link with standard crt and libraries\n"
 138            "  -Bdir       use 'dir' as tcc internal library and include path\n"
 139            "  -MD         generate target dependencies for make\n"
 140            "  -MF depfile put generated dependencies here\n"
 141            );
 142 }
 143
 144 /* re-execute the i386/x86_64 cross-compilers with tcc -m32/-m64: */
 145 #if defined TCC_TARGET_I386 || defined TCC_TARGET_X86_64
 146 #ifdef _WIN32
 147 #include <process.h>
 148 static int execvp_win32(const char *prog, char **argv)
 149 {
 150     int ret = _spawnvp(P_NOWAIT, prog, (const char *const*)argv);
 151     if (-1 == ret)
 152         return ret;
 153     cwait(&ret, ret, WAIT_CHILD);
 154     exit(ret);
 155 }
 156 #define execvp execvp_win32
 157 #endif
 158 static void exec_other_tcc(TCCState *s, char **argv, const char *optarg)
 159 {
 160     char child_path[4096], *child_name; const char *target;
 161     switch (atoi(optarg)) {
 162 #ifdef TCC_TARGET_I386
 163         case 32: break;
 164         case 64: target = "x86_64";
 165 #else
 166         case 64: break;
 167         case 32: target = "i386";
 168 #endif
 169             pstrcpy(child_path, sizeof child_path - 40, argv[0]);
 170             child_name = tcc_basename(child_path);
 171             strcpy(child_name, target);
 172 #ifdef TCC_TARGET_PE
 173             strcat(child_name, "-win32");
 174 #endif
 175             strcat(child_name, "-tcc");
 176             if (strcmp(argv[0], child_path)) {
 177                 if (s->verbose > 0)
 178                     printf("tcc: using '%s'\n", child_name), fflush(stdout);
 179                 execvp(argv[0] = child_path, argv);
 180             }
 181             tcc_error("'%s' not found", child_name);
 182         case 0: /* ignore -march etc. */
 183             break;
 184         default:
 185             tcc_warning("unsupported option \"-m%s\"", optarg);
 186     }
 187 }
 188 #else
 189 #define exec_other_tcc(s, argv, optarg)
 190 #endif
 191
 192 static void gen_makedeps(TCCState *s, const char *target, const char *filename)
 193 {
 194     FILE *depout;
 195     char buf[1024], *ext;
 196     int i;
 197
 198     if (!filename) {
 199         /* compute filename automatically
 200          * dir/file.o -> dir/file.d             */
 201         pstrcpy(buf, sizeof(buf), target);
 202         ext = tcc_fileextension(buf);
 203         pstrcpy(ext, sizeof(buf) - (ext-buf), ".d");
 204         filename = buf;
 205     }
 206
 207     if (s->verbose)
 208         printf("<- %s\n", filename);
 209
 210     /* XXX return err codes instead of error() ? */
 211     depout = fopen(filename, "w");
 212     if (!depout)
 213         tcc_error("could not open '%s'", filename);
 214
 215     fprintf(depout, "%s: \\\n", target);
 216     for (i=0; i<s->nb_target_deps; ++i)
 217         fprintf(depout, " %s \\\n", s->target_deps[i]);
 218     fprintf(depout, "\n");
 219     fclose(depout);
 220 }
 221
 222 static char *default_outputfile(TCCState *s, const char *first_file)
 223 {
 224     char buf[1024];
 225     char *ext;
 226     const char *name = "a";
 227
 228     if (first_file && strcmp(first_file, "-"))
 229         name = tcc_basename(first_file);
 230     pstrcpy(buf, sizeof(buf), name);
 231     ext = tcc_fileextension(buf);
 232 #ifdef TCC_TARGET_PE
 233     if (s->output_type == TCC_OUTPUT_DLL)
 234         strcpy(ext, ".dll");
 235     else
 236     if (s->output_type == TCC_OUTPUT_EXE)
 237         strcpy(ext, ".exe");
 238     else
 239 #endif
 240     if (s->output_type == TCC_OUTPUT_OBJ && !s->option_r && *ext)
 241         strcpy(ext, ".o");
 242     else
 243         strcpy(buf, "a.out");
 244
 245     return tcc_strdup(buf);
 246 }
 247
 248 static unsigned getclock_ms(void)
 249 {
 250 #ifdef _WIN32
 251     return GetTickCount();
 252 #else
 253     struct timeval tv;
 254     gettimeofday(&tv, NULL);
 255     return tv.tv_sec*1000 + (tv.tv_usec+500)/1000;
 256 #endif
 257 }
 258
 259 int main(int argc, char **argv)
 260 {
 261     TCCState *s;
 262     int ret, optind, i;
 263     unsigned start_time = 0;
 264     const char *first_file = NULL;
 265
 266     s = tcc_new();
 267
 268     optind = tcc_parse_args(s, argc - 1, argv + 1);
 269
 270     tcc_set_environment(s);
 271
 272     if (optind == 0) {
 273         help();
 274         return 1;
 275     }
 276
 277     if (s->option_m)
 278         exec_other_tcc(s, argv, s->option_m);
 279
 280     if (s->verbose)
 281         display_info(s, 0);
 282
 283     if (s->nb_files == 0) {
 284         if (optind == 1) {
 285             if (s->print_search_dirs || s->verbose == 2) {
 286                 tcc_set_output_type(s, TCC_OUTPUT_MEMORY);
 287                 display_info(s, 1);
 288                 return 1;
 289             }
 290             if (s->verbose)
 291                 return 1;
 292         }
 293         tcc_error("no input files\n");
 294     }
 295
 296     /* check -c consistency : only single file handled. XXX: checks file type */
 297     if (s->output_type == TCC_OUTPUT_OBJ && !s->option_r) {
 298         if (s->nb_libraries != 0)
 299             tcc_error("cannot specify libraries with -c");
 300         /* accepts only a single input file */
 301         if (s->nb_files != 1)
 302             tcc_error("cannot specify multiple files with -c");
 303     }
 304
 305     if (s->output_type == 0)
 306         s->output_type = TCC_OUTPUT_EXE;
 307     tcc_set_output_type(s, s->output_type);
 308
 309     if (s->output_type == TCC_OUTPUT_PREPROCESS) {
 310         if (!s->outfile) {
 311             s->ppfp = stdout;
 312         } else {
 313             s->ppfp = fopen(s->outfile, "w");
 314             if (!s->ppfp)
 315                 tcc_error("could not write '%s'", s->outfile);
 316         }
 317     } else if (s->output_type != TCC_OUTPUT_OBJ) {
 318         if (s->option_pthread)
 319             tcc_set_options(s, "-lpthread");
 320     }
 321
 322     if (s->do_bench)
 323         start_time = getclock_ms();
 324
 325     /* compile or add each files or library */
 326     for(i = ret = 0; i < s->nb_files && ret == 0; i++) {
 327         struct filespec *f = s->files[i];
 328         if (f->type >= AFF_TYPE_LIB) {
 329             s->alacarte_link = f->type == AFF_TYPE_LIB;
 330             if (tcc_add_library_err(s, f->name) < 0)
 331                 ret = 1;
 332         } else {
 333             if (1 == s->verbose)
 334                 printf("-> %s\n", f->name);
 335             s->filetype = f->type;
 336             if (tcc_add_file(s, f->name) < 0)
 337                 ret = 1;
 338             if (!first_file)
 339                 first_file = f->name;
 340         }
 341         s->filetype = AFF_TYPE_NONE;
 342         s->alacarte_link = 1;
 343     }
 344
 345     if (s->output_type == TCC_OUTPUT_PREPROCESS) {
 346         if (s->outfile)
 347             fclose(s->ppfp);
 348
 349     } else if (0 == ret) {
 350         if (s->output_type == TCC_OUTPUT_MEMORY) {
 351 #ifdef TCC_IS_NATIVE
 352             ret = tcc_run(s, argc - 1 - optind, argv + 1 + optind);
 353 #endif
 354         } else {
 355             if (!s->outfile)
 356                 s->outfile = default_outputfile(s, first_file);
 357             ret = !!tcc_output_file(s, s->outfile);
 358             if (s->gen_deps && !ret)
 359                 gen_makedeps(s, s->outfile, s->deps_outfile);
 360         }
 361     }
 362
 363     if (s->do_bench)
 364         tcc_print_stats(s, getclock_ms() - start_time);
 365     tcc_delete(s);
 366     return ret;
 367 }