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 #include "tcc.h"
  22 #if ONE_SOURCE
  23 # include "libtcc.c"
  24 #endif
  25 #include "tcctools.c"
  26
  27 static const char help[] =
  28     "Tiny C Compiler "TCC_VERSION" - Copyright (C) 2001-2006 Fabrice Bellard\n"
  29     "Usage: tcc [options...] [-o outfile] [-c] infile(s)...\n"
  30     "       tcc [options...] -run infile (or --) [arguments...]\n"
  31     "General options:\n"
  32     "  -c           compile only - generate an object file\n"
  33     "  -o outfile   set output filename\n"
  34     "  -run         run compiled source\n"
  35     "  -fflag       set or reset (with 'no-' prefix) 'flag' (see tcc -hh)\n"
  36     "  -std=c99     Conform to the ISO 1999 C standard (default).\n"
  37     "  -std=c11     Conform to the ISO 2011 C standard.\n"
  38     "  -Wwarning    set or reset (with 'no-' prefix) 'warning' (see tcc -hh)\n"
  39     "  -w           disable all warnings\n"
  40     "  -v --version show version\n"
  41     "  -vv          show search paths or loaded files\n"
  42     "  -h -hh       show this, show more help\n"
  43     "  -bench       show compilation statistics\n"
  44     "  -            use stdin pipe as infile\n"
  45     "  @listfile    read arguments from listfile\n"
  46     "Preprocessor options:\n"
  47     "  -Idir        add include path 'dir'\n"
  48     "  -Dsym[=val]  define 'sym' with value 'val'\n"
  49     "  -Usym        undefine 'sym'\n"
  50     "  -E           preprocess only\n"
  51     "Linker options:\n"
  52     "  -Ldir        add library path 'dir'\n"
  53     "  -llib        link with dynamic or static library 'lib'\n"
  54     "  -r           generate (relocatable) object file\n"
  55     "  -shared      generate a shared library/dll\n"
  56     "  -rdynamic    export all global symbols to dynamic linker\n"
  57     "  -soname      set name for shared library to be used at runtime\n"
  58     "  -Wl,-opt[=val]  set linker option (see tcc -hh)\n"
  59     "Debugger options:\n"
  60     "  -g           generate stab runtime debug info\n"
  61     "  -gdwarf[-x]  generate dwarf runtime debug info\n"
  62 #ifdef CONFIG_TCC_BCHECK
  63     "  -b           compile with built-in memory and bounds checker (implies -g)\n"
  64 #endif
  65 #ifdef CONFIG_TCC_BACKTRACE
  66     "  -bt[N]       link with backtrace (stack dump) support [show max N callers]\n"
  67 #endif
  68     "Misc. options:\n"
  69     "  -x[c|a|b|n]  specify type of the next infile (C,ASM,BIN,NONE)\n"
  70     "  -nostdinc    do not use standard system include paths\n"
  71     "  -nostdlib    do not link with standard crt and libraries\n"
  72     "  -Bdir        set tcc's private include/library dir\n"
  73     "  -M[M]D       generate make dependency file [ignore system files]\n"
  74     "  -M[M]        as above but no other output\n"
  75     "  -MF file     specify dependency file name\n"
  76 #if defined(TCC_TARGET_I386) || defined(TCC_TARGET_X86_64)
  77     "  -m32/64      defer to i386/x86_64 cross compiler\n"
  78 #endif
  79     "Tools:\n"
  80     "  create library  : tcc -ar [crstvx] lib [files]\n"
  81 #ifdef TCC_TARGET_PE
  82     "  create def file : tcc -impdef lib.dll [-v] [-o lib.def]\n"
  83 #endif
  84     ;
  85
  86 static const char help2[] =
  87     "Tiny C Compiler "TCC_VERSION" - More Options\n"
  88     "Special options:\n"
  89     "  -P -P1                        with -E: no/alternative #line output\n"
  90     "  -dD -dM                       with -E: output #define directives\n"
  91     "  -pthread                      same as -D_REENTRANT and -lpthread\n"
  92     "  -On                           same as -D__OPTIMIZE__ for n > 0\n"
  93     "  -Wp,-opt                      same as -opt\n"
  94     "  -include file                 include 'file' above each input file\n"
  95     "  -isystem dir                  add 'dir' to system include path\n"
  96     "  -static                       link to static libraries (not recommended)\n"
  97     "  -dumpversion                  print version\n"
  98     "  -print-search-dirs            print search paths\n"
  99     "  -dt                           with -run/-E: auto-define 'test_...' macros\n"
 100     "Ignored options:\n"
 101     "  -arch -C --param -pedantic -pipe -s -traditional\n"
 102     "-W[no-]... warnings:\n"
 103     "  all                           turn on some (*) warnings\n"
 104     "  error[=warning]               stop after warning (any or specified)\n"
 105     "  write-strings                 strings are const\n"
 106     "  unsupported                   warn about ignored options, pragmas, etc.\n"
 107     "  implicit-function-declaration warn for missing prototype (*)\n"
 108     "  discarded-qualifiers          warn when const is dropped (*)\n"
 109     "-f[no-]... flags:\n"
 110     "  unsigned-char                 default char is unsigned\n"
 111     "  signed-char                   default char is signed\n"
 112     "  common                        use common section instead of bss\n"
 113     "  leading-underscore            decorate extern symbols\n"
 114     "  ms-extensions                 allow anonymous struct in struct\n"
 115     "  dollars-in-identifiers        allow '$' in C symbols\n"
 116     "  test-coverage                 create code coverage code\n"
 117     "-m... target specific options:\n"
 118     "  ms-bitfields                  use MSVC bitfield layout\n"
 119 #ifdef TCC_TARGET_ARM
 120     "  float-abi                     hard/softfp on arm\n"
 121 #endif
 122 #ifdef TCC_TARGET_X86_64
 123     "  no-sse                        disable floats on x86_64\n"
 124 #endif
 125     "-Wl,... linker options:\n"
 126     "  -nostdlib                     do not link with standard crt/libs\n"
 127     "  -[no-]whole-archive           load lib(s) fully/only as needed\n"
 128     "  -export-all-symbols           same as -rdynamic\n"
 129     "  -export-dynamic               same as -rdynamic\n"
 130     "  -image-base= -Ttext=          set base address of executable\n"
 131     "  -section-alignment=           set section alignment in executable\n"
 132 #ifdef TCC_TARGET_PE
 133     "  -file-alignment=              set PE file alignment\n"
 134     "  -stack=                       set PE stack reserve\n"
 135     "  -large-address-aware          set related PE option\n"
 136     "  -subsystem=[console/windows]  set PE subsystem\n"
 137     "  -oformat=[pe-* binary]        set executable output format\n"
 138     "Predefined macros:\n"
 139     "  tcc -E -dM - < nul\n"
 140 #else
 141     "  -rpath=                       set dynamic library search path\n"
 142     "  -enable-new-dtags             set DT_RUNPATH instead of DT_RPATH\n"
 143     "  -soname=                      set DT_SONAME elf tag\n"
 144 #if defined(TCC_TARGET_MACHO)
 145     "  -install_name=                set DT_SONAME elf tag (soname macOS alias)\n"
 146 #endif
 147     "  -Bsymbolic                    set DT_SYMBOLIC elf tag\n"
 148     "  -oformat=[elf32/64-* binary]  set executable output format\n"
 149     "  -init= -fini= -Map= -as-needed -O   (ignored)\n"
 150     "Predefined macros:\n"
 151     "  tcc -E -dM - < /dev/null\n"
 152 #endif
 153     "See also the manual for more details.\n"
 154     ;
 155
 156 static const char version[] =
 157     "tcc version "TCC_VERSION
 158 #ifdef TCC_GITHASH
 159     " "TCC_GITHASH
 160 #endif
 161     " ("
 162 #ifdef TCC_TARGET_I386
 163         "i386"
 164 #elif defined TCC_TARGET_X86_64
 165         "x86_64"
 166 #elif defined TCC_TARGET_C67
 167         "C67"
 168 #elif defined TCC_TARGET_ARM
 169         "ARM"
 170 # ifdef TCC_ARM_EABI
 171         " eabi"
 172 #  ifdef TCC_ARM_HARDFLOAT
 173         "hf"
 174 #  endif
 175 # endif
 176 #elif defined TCC_TARGET_ARM64
 177         "AArch64"
 178 #elif defined TCC_TARGET_RISCV64
 179         "riscv64"
 180 #endif
 181 #ifdef TCC_TARGET_PE
 182         " Windows"
 183 #elif defined(TCC_TARGET_MACHO)
 184         " Darwin"
 185 #elif TARGETOS_FreeBSD || TARGETOS_FreeBSD_kernel
 186         " FreeBSD"
 187 #elif TARGETOS_OpenBSD
 188         " OpenBSD"
 189 #elif TARGETOS_NetBSD
 190         " NetBSD"
 191 #else
 192         " Linux"
 193 #endif
 194     ")\n"
 195     ;
 196
 197 static void print_dirs(const char *msg, char **paths, int nb_paths)
 198 {
 199     int i;
 200     printf("%s:\n%s", msg, nb_paths ? "" : "  -\n");
 201     for(i = 0; i < nb_paths; i++)
 202         printf("  %s\n", paths[i]);
 203 }
 204
 205 static void print_search_dirs(TCCState *s)
 206 {
 207     printf("install: %s\n", s->tcc_lib_path);
 208     /* print_dirs("programs", NULL, 0); */
 209     print_dirs("include", s->sysinclude_paths, s->nb_sysinclude_paths);
 210     print_dirs("libraries", s->library_paths, s->nb_library_paths);
 211     printf("libtcc1:\n  %s/%s\n", s->library_paths[0], CONFIG_TCC_CROSSPREFIX TCC_LIBTCC1);
 212 #if !defined TCC_TARGET_PE && !defined TCC_TARGET_MACHO
 213     print_dirs("crt", s->crt_paths, s->nb_crt_paths);
 214     printf("elfinterp:\n  %s\n",  DEFAULT_ELFINTERP(s));
 215 #endif
 216 }
 217
 218 static void set_environment(TCCState *s)
 219 {
 220     char * path;
 221
 222     path = getenv("C_INCLUDE_PATH");
 223     if(path != NULL) {
 224         tcc_add_sysinclude_path(s, path);
 225     }
 226     path = getenv("CPATH");
 227     if(path != NULL) {
 228         tcc_add_include_path(s, path);
 229     }
 230     path = getenv("LIBRARY_PATH");
 231     if(path != NULL) {
 232         tcc_add_library_path(s, path);
 233     }
 234 }
 235
 236 static char *default_outputfile(TCCState *s, const char *first_file)
 237 {
 238     char buf[1024];
 239     char *ext;
 240     const char *name = "a";
 241
 242     if (first_file && strcmp(first_file, "-"))
 243         name = tcc_basename(first_file);
 244     snprintf(buf, sizeof(buf), "%s", name);
 245     ext = tcc_fileextension(buf);
 246 #ifdef TCC_TARGET_PE
 247     if (s->output_type == TCC_OUTPUT_DLL)
 248         strcpy(ext, ".dll");
 249     else
 250     if (s->output_type == TCC_OUTPUT_EXE)
 251         strcpy(ext, ".exe");
 252     else
 253 #endif
 254     if ((s->just_deps || s->output_type == TCC_OUTPUT_OBJ) && !s->option_r && *ext)
 255         strcpy(ext, ".o");
 256     else
 257         strcpy(buf, "a.out");
 258     return tcc_strdup(buf);
 259 }
 260
 261 static unsigned getclock_ms(void)
 262 {
 263 #ifdef _WIN32
 264     return GetTickCount();
 265 #else
 266     struct timeval tv;
 267     gettimeofday(&tv, NULL);
 268     return tv.tv_sec*1000 + (tv.tv_usec+500)/1000;
 269 #endif
 270 }
 271
 272 int main(int argc0, char **argv0)
 273 {
 274     TCCState *s, *s1;
 275     int ret, opt, n = 0, t = 0, done;
 276     unsigned start_time = 0, end_time = 0;
 277     const char *first_file;
 278     int argc; char **argv;
 279     FILE *ppfp = stdout;
 280
 281 redo:
 282     argc = argc0, argv = argv0;
 283     s = s1 = tcc_new();
 284 #ifdef CONFIG_TCC_SWITCHES /* predefined options */
 285     tcc_set_options(s, CONFIG_TCC_SWITCHES);
 286 #endif
 287     opt = tcc_parse_args(s, &argc, &argv, 1);
 288     if (opt < 0)
 289         return 1;
 290
 291     if (n == 0) {
 292         if (opt == OPT_HELP) {
 293             fputs(help, stdout);
 294             if (!s->verbose)
 295                 return 0;
 296             ++opt;
 297         }
 298         if (opt == OPT_HELP2) {
 299             fputs(help2, stdout);
 300             return 0;
 301         }
 302         if (opt == OPT_M32 || opt == OPT_M64)
 303             return tcc_tool_cross(s, argv, opt);
 304         if (s->verbose)
 305             printf("%s", version);
 306         if (opt == OPT_AR)
 307             return tcc_tool_ar(s, argc, argv);
 308 #ifdef TCC_TARGET_PE
 309         if (opt == OPT_IMPDEF)
 310             return tcc_tool_impdef(s, argc, argv);
 311 #endif
 312         if (opt == OPT_V)
 313             return 0;
 314         if (opt == OPT_PRINT_DIRS) {
 315             /* initialize search dirs */
 316             set_environment(s);
 317             tcc_set_output_type(s, TCC_OUTPUT_MEMORY);
 318             print_search_dirs(s);
 319             return 0;
 320         }
 321
 322         if (s->nb_files == 0) {
 323             tcc_error_noabort("no input files");
 324         } else if (s->output_type == TCC_OUTPUT_PREPROCESS) {
 325             if (s->outfile && 0!=strcmp("-",s->outfile)) {
 326                 ppfp = fopen(s->outfile, "w");
 327                 if (!ppfp)
 328                     tcc_error_noabort("could not write '%s'", s->outfile);
 329             }
 330         } else if (s->output_type == TCC_OUTPUT_OBJ && !s->option_r) {
 331             if (s->nb_libraries)
 332                 tcc_error_noabort("cannot specify libraries with -c");
 333             else if (s->nb_files > 1 && s->outfile)
 334                 tcc_error_noabort("cannot specify output file with -c many files");
 335         }
 336         if (s->nb_errors)
 337             return 1;
 338         if (s->do_bench)
 339             start_time = getclock_ms();
 340     }
 341
 342     set_environment(s);
 343     if (s->output_type == 0)
 344         s->output_type = TCC_OUTPUT_EXE;
 345     tcc_set_output_type(s, s->output_type);
 346     s->ppfp = ppfp;
 347
 348     if ((s->output_type == TCC_OUTPUT_MEMORY
 349       || s->output_type == TCC_OUTPUT_PREPROCESS)
 350         && (s->dflag & 16)) { /* -dt option */
 351         if (t)
 352             s->dflag |= 32;
 353         s->run_test = ++t;
 354         if (n)
 355             --n;
 356     }
 357
 358     /* compile or add each files or library */
 359     first_file = NULL, ret = 0;
 360     do {
 361         struct filespec *f = s->files[n];
 362         s->filetype = f->type;
 363         if (f->type & AFF_TYPE_LIB) {
 364             if (tcc_add_library_err(s, f->name) < 0)
 365                 ret = 1;
 366         } else {
 367             if (1 == s->verbose)
 368                 printf("-> %s\n", f->name);
 369             if (!first_file)
 370                 first_file = f->name;
 371             if (tcc_add_file(s, f->name) < 0)
 372                 ret = 1;
 373         }
 374         done = ret || ++n >= s->nb_files;
 375     } while (!done && (s->output_type != TCC_OUTPUT_OBJ || s->option_r));
 376
 377     if (s->do_bench)
 378         end_time = getclock_ms();
 379
 380     if (s->run_test) {
 381         t = 0;
 382     } else if (s->output_type == TCC_OUTPUT_PREPROCESS) {
 383         ;
 384     } else if (0 == ret) {
 385         if (s->output_type == TCC_OUTPUT_MEMORY) {
 386 #ifdef TCC_IS_NATIVE
 387             ret = tcc_run(s, argc, argv);
 388 #endif
 389         } else {
 390             if (!s->outfile)
 391                 s->outfile = default_outputfile(s, first_file);
 392             if (!s->just_deps && tcc_output_file(s, s->outfile))
 393                 ret = 1;
 394             else if (s->gen_deps)
 395                 ret = gen_makedeps(s, s->outfile, s->deps_outfile);
 396         }
 397     }
 398
 399     if (done && 0 == t && 0 == ret && s->do_bench)
 400         tcc_print_stats(s, end_time - start_time);
 401
 402     tcc_delete(s);
 403     if (!done)
 404         goto redo; /* compile more files with -c */
 405     if (t)
 406         goto redo; /* run more tests with -dt -run */
 407
 408     if (ppfp && ppfp != stdout)
 409         fclose(ppfp);
 410     return ret;
 411 }