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 #else
  60         " Linux"
  61 #endif
  62         ")\n", TCC_VERSION);
  63         break;
  64     case 1:
  65         printf("install: %s\n", s->tcc_lib_path);
  66         /* print_paths("programs", NULL, 0); */
  67         print_paths("include", s->sysinclude_paths, s->nb_sysinclude_paths);
  68         print_paths("libraries", s->library_paths, s->nb_library_paths);
  69 #ifndef TCC_TARGET_PE
  70         print_paths("crt", s->crt_paths, s->nb_crt_paths);
  71         printf("elfinterp:\n  %s\n",  DEFAULT_ELFINTERP(s));
  72 #endif
  73         break;
  74     }
  75 }
  76
  77 static void help(void)
  78 {
  79     printf("Tiny C Compiler "TCC_VERSION" - Copyright (C) 2001-2006 Fabrice Bellard\n"
  80            "Usage: tcc [options...] [-o outfile] [-c] infile(s)...\n"
  81            "       tcc [options...] -run infile [arguments...]\n"
  82            "General options:\n"
  83            "  -c          compile only - generate an object file\n"
  84            "  -o outfile  set output filename\n"
  85            "  -run        run compiled source\n"
  86            "  -fflag      set or reset (with 'no-' prefix) 'flag' (see man page)\n"
  87            "  -Wwarning   set or reset (with 'no-' prefix) 'warning' (see man page)\n"
  88            "  -w          disable all warnings\n"
  89            "  -v          show version\n"
  90            "  -vv         show included files (as sole argument: show search paths)\n"
  91            "  -dumpversion\n"
  92            "  -bench      show compilation statistics\n"
  93            "  -xc -xa     specify type of the next infile\n"
  94            "  -           use stdin pipe as infile\n"
  95            "  @listfile   read arguments from listfile\n"
  96            "Preprocessor options:\n"
  97            "  -Idir       add include path 'dir'\n"
  98            "  -Dsym[=val] define 'sym' with value 'val'\n"
  99            "  -Usym       undefine 'sym'\n"
 100            "  -E          preprocess only\n"
 101            "  -P[1]       no / alternative #line output with -E\n"
 102            "  -dD -dM     output #define directives with -E\n"
 103            "Linker options:\n"
 104            "  -Ldir       add library path 'dir'\n"
 105            "  -llib       link with dynamic or static library 'lib'\n"
 106            "  -pthread    link with -lpthread and -D_REENTRANT (POSIX Linux)\n"
 107            "  -r          generate (relocatable) object file\n"
 108            "  -rdynamic   export all global symbols to dynamic linker\n"
 109            "  -shared     generate a shared library\n"
 110            "  -soname     set name for shared library to be used at runtime\n"
 111            "  -static     static linking\n"
 112            "  -Wl,-opt[=val]  set linker option (see manual)\n"
 113            "Debugger options:\n"
 114            "  -g          generate runtime debug info\n"
 115 #ifdef CONFIG_TCC_BCHECK
 116            "  -b          compile with built-in memory and bounds checker (implies -g)\n"
 117 #endif
 118 #ifdef CONFIG_TCC_BACKTRACE
 119            "  -bt N       show N callers in stack traces\n"
 120 #endif
 121            "Misc options:\n"
 122            "  -nostdinc   do not use standard system include paths\n"
 123            "  -nostdlib   do not link with standard crt and libraries\n"
 124            "  -Bdir       use 'dir' as tcc internal library and include path\n"
 125            "  -MD         generate target dependencies for make\n"
 126            "  -MF depfile put generated dependencies here\n"
 127            );
 128 }
 129
 130 /* re-execute the i386/x86_64 cross-compilers with tcc -m32/-m64: */
 131 #if defined TCC_TARGET_I386 || defined TCC_TARGET_X86_64
 132 #ifdef _WIN32
 133 #include <process.h>
 134 static int execvp_win32(const char *prog, char **argv)
 135 {
 136     int ret = _spawnvp(P_NOWAIT, prog, (const char *const*)argv);
 137     if (-1 == ret)
 138         return ret;
 139     cwait(&ret, ret, WAIT_CHILD);
 140     exit(ret);
 141 }
 142 #define execvp execvp_win32
 143 #endif
 144 static void exec_other_tcc(TCCState *s, char **argv, const char *optarg)
 145 {
 146     char child_path[4096], *child_name; const char *target;
 147     switch (atoi(optarg)) {
 148 #ifdef TCC_TARGET_I386
 149         case 32: break;
 150         case 64: target = "x86_64";
 151 #else
 152         case 64: break;
 153         case 32: target = "i386";
 154 #endif
 155             pstrcpy(child_path, sizeof child_path - 40, argv[0]);
 156             child_name = tcc_basename(child_path);
 157             strcpy(child_name, target);
 158 #ifdef TCC_TARGET_PE
 159             strcat(child_name, "-win32");
 160 #endif
 161             strcat(child_name, "-tcc");
 162             if (strcmp(argv[0], child_path)) {
 163                 if (s->verbose > 0)
 164                     printf("tcc: using '%s'\n", child_name), fflush(stdout);
 165                 execvp(argv[0] = child_path, argv);
 166             }
 167             tcc_error("'%s' not found", child_name);
 168         case 0: /* ignore -march etc. */
 169             break;
 170         default:
 171             tcc_warning("unsupported option \"-m%s\"", optarg);
 172     }
 173 }
 174 #else
 175 #define exec_other_tcc(s, argv, optarg)
 176 #endif
 177
 178 static void gen_makedeps(TCCState *s, const char *target, const char *filename)
 179 {
 180     FILE *depout;
 181     char buf[1024], *ext;
 182     int i;
 183
 184     if (!filename) {
 185         /* compute filename automatically
 186          * dir/file.o -> dir/file.d             */
 187         pstrcpy(buf, sizeof(buf), target);
 188         ext = tcc_fileextension(buf);
 189         pstrcpy(ext, sizeof(buf) - (ext-buf), ".d");
 190         filename = buf;
 191     }
 192
 193     if (s->verbose)
 194         printf("<- %s\n", filename);
 195
 196     /* XXX return err codes instead of error() ? */
 197     depout = fopen(filename, "w");
 198     if (!depout)
 199         tcc_error("could not open '%s'", filename);
 200
 201     fprintf(depout, "%s : \\\n", target);
 202     for (i=0; i<s->nb_target_deps; ++i)
 203         fprintf(depout, " %s \\\n", s->target_deps[i]);
 204     fprintf(depout, "\n");
 205     fclose(depout);
 206 }
 207
 208 static char *default_outputfile(TCCState *s, const char *first_file)
 209 {
 210     char buf[1024];
 211     char *ext;
 212     const char *name = "a";
 213
 214     if (first_file && strcmp(first_file, "-"))
 215         name = tcc_basename(first_file);
 216     pstrcpy(buf, sizeof(buf), name);
 217     ext = tcc_fileextension(buf);
 218 #ifdef TCC_TARGET_PE
 219     if (s->output_type == TCC_OUTPUT_DLL)
 220         strcpy(ext, ".dll");
 221     else
 222     if (s->output_type == TCC_OUTPUT_EXE)
 223         strcpy(ext, ".exe");
 224     else
 225 #endif
 226     if (s->output_type == TCC_OUTPUT_OBJ && !s->option_r && *ext)
 227         strcpy(ext, ".o");
 228     else
 229         strcpy(buf, "a.out");
 230
 231     return tcc_strdup(buf);
 232 }
 233
 234 static int64_t getclock_us(void)
 235 {
 236 #ifdef _WIN32
 237     LARGE_INTEGER frequency, t1;
 238     QueryPerformanceFrequency(&frequency);
 239     QueryPerformanceCounter(&t1);
 240     return t1.QuadPart * 1000000LL / frequency.QuadPart;
 241 #else
 242     struct timeval tv;
 243     gettimeofday(&tv, NULL);
 244     return tv.tv_sec * 1000000LL + tv.tv_usec;
 245 #endif
 246 }
 247
 248 int main(int argc, char **argv)
 249 {
 250     TCCState *s;
 251     int ret, optind, i;
 252     int64_t start_time = 0;
 253     const char *first_file = NULL;
 254
 255     s = tcc_new();
 256
 257     optind = tcc_parse_args(s, argc - 1, argv + 1);
 258
 259     tcc_set_environment(s);
 260
 261     if (optind == 0) {
 262         help();
 263         return 1;
 264     }
 265
 266     if (s->option_m)
 267         exec_other_tcc(s, argv, s->option_m);
 268
 269     if (s->verbose)
 270         display_info(s, 0);
 271
 272     if (s->nb_files == 0) {
 273         if (optind == 1) {
 274             if (s->print_search_dirs || s->verbose == 2) {
 275                 tcc_set_output_type(s, TCC_OUTPUT_MEMORY);
 276                 display_info(s, 1);
 277                 return 1;
 278             }
 279             if (s->verbose)
 280                 return 1;
 281         }
 282         tcc_error("no input files\n");
 283     }
 284
 285     /* check -c consistency : only single file handled. XXX: checks file type */
 286     if (s->output_type == TCC_OUTPUT_OBJ && !s->option_r) {
 287         if (s->nb_libraries != 0)
 288             tcc_error("cannot specify libraries with -c");
 289         /* accepts only a single input file */
 290         if (s->nb_files != 1)
 291             tcc_error("cannot specify multiple files with -c");
 292     }
 293
 294     if (s->output_type == 0)
 295         s->output_type = TCC_OUTPUT_EXE;
 296     tcc_set_output_type(s, s->output_type);
 297
 298     if (s->output_type == TCC_OUTPUT_PREPROCESS) {
 299         if (!s->outfile) {
 300             s->ppfp = stdout;
 301         } else {
 302             s->ppfp = fopen(s->outfile, "w");
 303             if (!s->ppfp)
 304                 tcc_error("could not write '%s'", s->outfile);
 305         }
 306     } else if (s->output_type != TCC_OUTPUT_OBJ) {
 307         if (s->option_pthread)
 308             tcc_set_options(s, "-lpthread");
 309     }
 310
 311     if (s->do_bench)
 312         start_time = getclock_us();
 313
 314     /* compile or add each files or library */
 315     for(i = ret = 0; i < s->nb_files && ret == 0; i++) {
 316         struct filespec *f = s->files[i];
 317         if (f->type >= AFF_TYPE_LIB) {
 318             s->alacarte_link = f->type == AFF_TYPE_LIB;
 319             if (tcc_add_library_err(s, f->name) < 0)
 320                 ret = 1;
 321         } else {
 322             if (1 == s->verbose)
 323                 printf("-> %s\n", f->name);
 324             s->filetype = f->type;
 325             if (tcc_add_file(s, f->name) < 0)
 326                 ret = 1;
 327             if (!first_file)
 328                 first_file = f->name;
 329         }
 330         s->filetype = AFF_TYPE_NONE;
 331         s->alacarte_link = 1;
 332     }
 333
 334     if (s->output_type == TCC_OUTPUT_PREPROCESS) {
 335         if (s->outfile)
 336             fclose(s->ppfp);
 337
 338     } else if (0 == ret) {
 339         if (s->do_bench)
 340             tcc_print_stats(s, getclock_us() - start_time);
 341         if (s->output_type == TCC_OUTPUT_MEMORY) {
 342 #ifdef TCC_IS_NATIVE
 343             ret = tcc_run(s, argc - 1 - optind, argv + 1 + optind);
 344 #endif
 345         } else {
 346             if (!s->outfile)
 347                 s->outfile = default_outputfile(s, first_file);
 348             ret = !!tcc_output_file(s, s->outfile);
 349             if (s->gen_deps && !ret)
 350                 gen_makedeps(s, s->outfile, s->deps_outfile);
 351         }
 352     }
 353
 354     tcc_delete(s);
 355     return ret;
 356 }