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