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            "  -bench      show compilation statistics\n"
 105            "Preprocessor options:\n"
 106            "  -Idir       add include path 'dir'\n"
 107            "  -Dsym[=val] define 'sym' with value 'val'\n"
 108            "  -Usym       undefine 'sym'\n"
 109            "  -E          preprocess only\n"
 110            "  -P[1]       no / alternative #line output with -E\n"
 111            "  -dD -dM     output #define directives with -E\n"
 112            "  -include file  include file above each input file\n"
 113            "Linker options:\n"
 114            "  -Ldir       add library path 'dir'\n"
 115            "  -llib       link with dynamic or static library 'lib'\n"
 116            "  -r          generate (relocatable) object file\n"
 117            "  -shared     generate a shared library\n"
 118            "  -rdynamic   export all global symbols to dynamic linker\n"
 119            "  -soname     set name for shared library to be used at runtime\n"
 120            "  -static     static linking\n"
 121            "  -pthread    link with -lpthread and -D_REENTRANT (POSIX Linux)\n"
 122            "  -Wl,-opt[=val]  set linker option (see manual)\n"
 123            "Debugger options:\n"
 124            "  -g          generate runtime debug info\n"
 125 #ifdef CONFIG_TCC_BCHECK
 126            "  -b          compile with built-in memory and bounds checker (implies -g)\n"
 127 #endif
 128 #ifdef CONFIG_TCC_BACKTRACE
 129            "  -bt N       show N callers in stack traces\n"
 130 #endif
 131            "Misc options:\n"
 132            "  -x[c|a|n]   specify type of the next infile\n"
 133            "  -nostdinc   do not use standard system include paths\n"
 134            "  -nostdlib   do not link with standard crt and libraries\n"
 135            "  -Bdir       use 'dir' as tcc's private library/include path\n"
 136            "  -MD         generate target dependencies for make\n"
 137            "  -MF depfile put generated dependencies here\n"
 138            "  -dumpversion  print version\n"
 139            "  -           use stdin pipe as infile\n"
 140            "  @listfile   read arguments from listfile\n"
 141            "Target specific options:\n"
 142            "  -m32/64     execute i386/x86-64 cross compiler\n"
 143            "  -mms-bitfields  use MSVC bitfield layout\n"
 144 #ifdef TCC_TARGET_ARM
 145            "  -mfloat-abi hard/softfp on arm\n"
 146 #endif
 147 #ifdef TCC_TARGET_X86_64
 148            "  -mno-sse    disable floats on x86-64\n"
 149 #endif
 150            );
 151 }
 152
 153 /* re-execute the i386/x86_64 cross-compilers with tcc -m32/-m64: */
 154 #if defined TCC_TARGET_I386 || defined TCC_TARGET_X86_64
 155 #ifdef _WIN32
 156 #include <process.h>
 157
 158 static char *str_replace(const char *str, const char *p, const char *r)
 159 {
 160     const char *s, *s0;
 161     char *d, *d0;
 162     int sl, pl, rl;
 163
 164     sl = strlen(str);
 165     pl = strlen(p);
 166     rl = strlen(r);
 167     for (d0 = NULL;; d0 = tcc_malloc(sl + 1)) {
 168         for (d = d0, s = str; s0 = s, s = strstr(s, p), s; s += pl) {
 169             if (d) {
 170                 memcpy(d, s0, sl = s - s0), d += sl;
 171                 memcpy(d, r, rl), d += rl;
 172             } else
 173                 sl += rl - pl;
 174         }
 175         if (d) {
 176             strcpy(d, s0);
 177             return d0;
 178         }
 179     }
 180 }
 181
 182 static int execvp_win32(const char *prog, char **argv)
 183 {
 184     int ret; char **p;
 185     /* replace all " by \" */
 186     for (p = argv; *p; ++p)
 187         if (strchr(*p, '"'))
 188             *p = str_replace(*p, "\"", "\\\"");
 189     ret = _spawnvp(P_NOWAIT, prog, (const char *const*)argv);
 190     if (-1 == ret)
 191         return ret;
 192     cwait(&ret, ret, WAIT_CHILD);
 193     exit(ret);
 194 }
 195 #define execvp execvp_win32
 196 #endif
 197 static void exec_other_tcc(TCCState *s, char **argv, int option)
 198 {
 199     char child_path[4096], *a0 = argv[0]; const char *target;
 200     int l;
 201
 202     switch (option) {
 203
 204 #ifdef TCC_TARGET_I386
 205         case 32: break;
 206         case 64: target = "x86_64";
 207 #else
 208         case 64: break;
 209         case 32: target = "i386";
 210
 211 #endif
 212             l = tcc_basename(a0) - a0;
 213             snprintf(child_path, sizeof child_path,
 214 #ifdef TCC_TARGET_PE
 215                 "%.*s%s-win32-tcc"
 216 #else
 217                 "%.*s%s-tcc"
 218 #endif
 219                 , l, a0, target);
 220             if (strcmp(a0, child_path)) {
 221                 if (s->verbose > 0)
 222                     printf("tcc: using '%s'\n", child_path + l), fflush(stdout);
 223                 execvp(argv[0] = child_path, argv);
 224             }
 225             tcc_error("'%s' not found", child_path + l);
 226     }
 227 }
 228 #else
 229 #define exec_other_tcc(s, argv, option)
 230 #endif
 231
 232 static void gen_makedeps(TCCState *s, const char *target, const char *filename)
 233 {
 234     FILE *depout;
 235     char buf[1024];
 236     int i;
 237
 238     if (!filename) {
 239         /* compute filename automatically: dir/file.o -> dir/file.d */
 240         snprintf(buf, sizeof buf, "%.*s.d",
 241             (int)(tcc_fileextension(target) - target), target);
 242         filename = buf;
 243     }
 244
 245     if (s->verbose)
 246         printf("<- %s\n", filename);
 247
 248     /* XXX return err codes instead of error() ? */
 249     depout = fopen(filename, "w");
 250     if (!depout)
 251         tcc_error("could not open '%s'", filename);
 252
 253     fprintf(depout, "%s: \\\n", target);
 254     for (i=0; i<s->nb_target_deps; ++i)
 255         fprintf(depout, " %s \\\n", s->target_deps[i]);
 256     fprintf(depout, "\n");
 257     fclose(depout);
 258 }
 259
 260 static char *default_outputfile(TCCState *s, const char *first_file)
 261 {
 262     char buf[1024];
 263     char *ext;
 264     const char *name = "a";
 265
 266     if (first_file && strcmp(first_file, "-"))
 267         name = tcc_basename(first_file);
 268     snprintf(buf, sizeof(buf), "%s", name);
 269     ext = tcc_fileextension(buf);
 270 #ifdef TCC_TARGET_PE
 271     if (s->output_type == TCC_OUTPUT_DLL)
 272         strcpy(ext, ".dll");
 273     else
 274     if (s->output_type == TCC_OUTPUT_EXE)
 275         strcpy(ext, ".exe");
 276     else
 277 #endif
 278     if (s->output_type == TCC_OUTPUT_OBJ && !s->option_r && *ext)
 279         strcpy(ext, ".o");
 280     else
 281         strcpy(buf, "a.out");
 282     return tcc_strdup(buf);
 283 }
 284
 285 static unsigned getclock_ms(void)
 286 {
 287 #ifdef _WIN32
 288     return GetTickCount();
 289 #else
 290     struct timeval tv;
 291     gettimeofday(&tv, NULL);
 292     return tv.tv_sec*1000 + (tv.tv_usec+500)/1000;
 293 #endif
 294 }
 295
 296 int main(int argc, char **argv)
 297 {
 298     TCCState *s;
 299     int ret, optind, i;
 300     unsigned start_time = 0;
 301     const char *first_file = NULL;
 302
 303     s = tcc_new();
 304
 305     optind = tcc_parse_args(s, argc - 1, argv + 1);
 306
 307     tcc_set_environment(s);
 308
 309     if (optind == 0) {
 310         help();
 311         return 1;
 312     }
 313
 314     if (s->cross_target)
 315         exec_other_tcc(s, argv, s->cross_target);
 316
 317     if (s->verbose)
 318         display_info(s, 0);
 319
 320     if (s->nb_files == 0) {
 321         if (optind == 1) {
 322             if (s->print_search_dirs || s->verbose == 2) {
 323                 tcc_set_output_type(s, TCC_OUTPUT_MEMORY);
 324                 display_info(s, 1);
 325                 return 1;
 326             }
 327             if (s->verbose)
 328                 return 1;
 329         }
 330         tcc_error("no input files\n");
 331     }
 332
 333     /* check -c consistency : only single file handled. XXX: checks file type */
 334     if (s->output_type == TCC_OUTPUT_OBJ && !s->option_r) {
 335         if (s->nb_libraries != 0)
 336             tcc_error("cannot specify libraries with -c");
 337         /* accepts only a single input file */
 338         if (s->nb_files != 1)
 339             tcc_error("cannot specify multiple files with -c");
 340     }
 341
 342     if (s->output_type == 0)
 343         s->output_type = TCC_OUTPUT_EXE;
 344     tcc_set_output_type(s, s->output_type);
 345
 346     if (s->output_type == TCC_OUTPUT_PREPROCESS) {
 347         if (!s->outfile) {
 348             s->ppfp = stdout;
 349         } else {
 350             s->ppfp = fopen(s->outfile, "w");
 351             if (!s->ppfp)
 352                 tcc_error("could not write '%s'", s->outfile);
 353         }
 354     } else if (s->output_type != TCC_OUTPUT_OBJ) {
 355         if (s->option_pthread)
 356             tcc_set_options(s, "-lpthread");
 357     }
 358
 359     if (s->do_bench)
 360         start_time = getclock_ms();
 361
 362     /* compile or add each files or library */
 363     for(i = ret = 0; i < s->nb_files && ret == 0; i++) {
 364         struct filespec *f = s->files[i];
 365         if (f->type >= AFF_TYPE_LIB) {
 366             s->alacarte_link = f->type == AFF_TYPE_LIB;
 367             if (tcc_add_library_err(s, f->name) < 0)
 368                 ret = 1;
 369         } else {
 370             if (1 == s->verbose)
 371                 printf("-> %s\n", f->name);
 372             s->filetype = f->type;
 373             if (tcc_add_file(s, f->name) < 0)
 374                 ret = 1;
 375             if (!first_file)
 376                 first_file = f->name;
 377         }
 378         s->filetype = AFF_TYPE_NONE;
 379         s->alacarte_link = 1;
 380     }
 381
 382     if (s->output_type == TCC_OUTPUT_PREPROCESS) {
 383         if (s->outfile)
 384             fclose(s->ppfp);
 385
 386     } else if (0 == ret) {
 387         if (s->output_type == TCC_OUTPUT_MEMORY) {
 388 #ifdef TCC_IS_NATIVE
 389             ret = tcc_run(s, argc - 1 - optind, argv + 1 + optind);
 390 #endif
 391         } else {
 392             if (!s->outfile)
 393                 s->outfile = default_outputfile(s, first_file);
 394             ret = !!tcc_output_file(s, s->outfile);
 395             if (s->gen_deps && !ret)
 396                 gen_makedeps(s, s->outfile, s->deps_outfile);
 397         }
 398     }
 399
 400     if (s->do_bench)
 401         tcc_print_stats(s, getclock_ms() - start_time);
 402     tcc_delete(s);
 403     return ret;
 404 }