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     "  -Wwarning    set or reset (with 'no-' prefix) 'warning' (see tcc -hh)\n"
  37     "  -w           disable all warnings\n"
  38     "  -v --version show version\n"
  39     "  -vv          show search paths or loaded files\n"
  40     "  -h -hh       show this, show more help\n"
  41     "  -bench       show compilation statistics\n"
  42     "  -            use stdin pipe as infile\n"
  43     "  @listfile    read arguments from listfile\n"
  44     "Preprocessor options:\n"
  45     "  -Idir        add include path 'dir'\n"
  46     "  -Dsym[=val]  define 'sym' with value 'val'\n"
  47     "  -Usym        undefine 'sym'\n"
  48     "  -E           preprocess only\n"
  49     "Linker options:\n"
  50     "  -Ldir        add library path 'dir'\n"
  51     "  -llib        link with dynamic or static library 'lib'\n"
  52     "  -r           generate (relocatable) object file\n"
  53     "  -shared      generate a shared library/dll\n"
  54     "  -rdynamic    export all global symbols to dynamic linker\n"
  55     "  -soname      set name for shared library to be used at runtime\n"
  56     "  -Wl,-opt[=val]  set linker option (see tcc -hh)\n"
  57     "Debugger options:\n"
  58     "  -g           generate stab runtime debug info\n"
  59     "  -gdwarf[-x]  generate dwarf runtime debug info\n"
  60 #ifdef TCC_TARGET_PE
  61     "  -g.pdb       create .pdb debug database\n"
  62 #endif
  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     "  -std=version define __STDC_VERSION__ according to version (c11/gnu11)\n"
  71     "  -x[c|a|b|n]  specify type of the next infile (C,ASM,BIN,NONE)\n"
  72     "  -nostdinc    do not use standard system include paths\n"
  73     "  -nostdlib    do not link with standard crt and libraries\n"
  74     "  -Bdir        set tcc's private include/library dir\n"
  75     "  -M[M]D       generate make dependency file [ignore system files]\n"
  76     "  -M[M]        as above but no other output\n"
  77     "  -MF file     specify dependency file name\n"
  78 #if defined(TCC_TARGET_I386) || defined(TCC_TARGET_X86_64)
  79     "  -m32/64      defer to i386/x86_64 cross compiler\n"
  80 #endif
  81     "Tools:\n"
  82     "  create library  : tcc -ar [crstvx] lib [files]\n"
  83 #ifdef TCC_TARGET_PE
  84     "  create def file : tcc -impdef lib.dll [-v] [-o lib.def]\n"
  85 #endif
  86     ;
  87
  88 static const char help2[] =
  89     "Tiny C Compiler "TCC_VERSION" - More Options\n"
  90     "Special options:\n"
  91     "  -P -P1                        with -E: no/alternative #line output\n"
  92     "  -dD -dM                       with -E: output #define directives\n"
  93     "  -pthread                      same as -D_REENTRANT and -lpthread\n"
  94     "  -On                           same as -D__OPTIMIZE__ for n > 0\n"
  95     "  -Wp,-opt                      same as -opt\n"
  96     "  -include file                 include 'file' above each input file\n"
  97     "  -isystem dir                  add 'dir' to system include path\n"
  98     "  -static                       link to static libraries (not recommended)\n"
  99     "  -dumpversion                  print version\n"
 100     "  -print-search-dirs            print search paths\n"
 101     "  -dt                           with -run/-E: auto-define 'test_...' macros\n"
 102     "Ignored options:\n"
 103     "  -arch -C --param -pedantic -pipe -s -traditional\n"
 104     "-W[no-]... warnings:\n"
 105     "  all                           turn on some (*) warnings\n"
 106     "  error[=warning]               stop after warning (any or specified)\n"
 107     "  write-strings                 strings are const\n"
 108     "  unsupported                   warn about ignored options, pragmas, etc.\n"
 109     "  implicit-function-declaration warn for missing prototype (*)\n"
 110     "  discarded-qualifiers          warn when const is dropped (*)\n"
 111     "-f[no-]... flags:\n"
 112     "  unsigned-char                 default char is unsigned\n"
 113     "  signed-char                   default char is signed\n"
 114     "  common                        use common section instead of bss\n"
 115     "  leading-underscore            decorate extern symbols\n"
 116     "  ms-extensions                 allow anonymous struct in struct\n"
 117     "  dollars-in-identifiers        allow '$' in C symbols\n"
 118     "  test-coverage                 create code coverage code\n"
 119     "-m... target specific options:\n"
 120     "  ms-bitfields                  use MSVC bitfield layout\n"
 121 #ifdef TCC_TARGET_ARM
 122     "  float-abi                     hard/softfp on arm\n"
 123 #endif
 124 #ifdef TCC_TARGET_X86_64
 125     "  no-sse                        disable floats on x86_64\n"
 126 #endif
 127     "-Wl,... linker options:\n"
 128     "  -nostdlib                     do not link with standard crt/libs\n"
 129     "  -[no-]whole-archive           load lib(s) fully/only as needed\n"
 130     "  -export-all-symbols           same as -rdynamic\n"
 131     "  -export-dynamic               same as -rdynamic\n"
 132     "  -image-base= -Ttext=          set base address of executable\n"
 133     "  -section-alignment=           set section alignment in executable\n"
 134 #ifdef TCC_TARGET_PE
 135     "  -file-alignment=              set PE file alignment\n"
 136     "  -stack=                       set PE stack reserve\n"
 137     "  -large-address-aware          set related PE option\n"
 138     "  -subsystem=[console/windows]  set PE subsystem\n"
 139     "  -oformat=[pe-* binary]        set executable output format\n"
 140     "Predefined macros:\n"
 141     "  tcc -E -dM - < nul\n"
 142 #else
 143     "  -rpath=                       set dynamic library search path\n"
 144     "  -enable-new-dtags             set DT_RUNPATH instead of DT_RPATH\n"
 145     "  -soname=                      set DT_SONAME elf tag\n"
 146 #if defined(TCC_TARGET_MACHO)
 147     "  -install_name=                set DT_SONAME elf tag (soname macOS alias)\n"
 148 #endif
 149     "  -Bsymbolic                    set DT_SYMBOLIC elf tag\n"
 150     "  -oformat=[elf32/64-* binary]  set executable output format\n"
 151     "  -init= -fini= -Map= -as-needed -O   (ignored)\n"
 152     "Predefined macros:\n"
 153     "  tcc -E -dM - < /dev/null\n"
 154 #endif
 155     "See also the manual for more details.\n"
 156     ;
 157
 158 static const char version[] =
 159     "tcc version "TCC_VERSION
 160 #ifdef TCC_GITHASH
 161     " "TCC_GITHASH
 162 #endif
 163     " ("
 164 #ifdef TCC_TARGET_I386
 165         "i386"
 166 #elif defined TCC_TARGET_X86_64
 167         "x86_64"
 168 #elif defined TCC_TARGET_C67
 169         "C67"
 170 #elif defined TCC_TARGET_ARM
 171         "ARM"
 172 # ifdef TCC_ARM_EABI
 173         " eabi"
 174 #  ifdef TCC_ARM_HARDFLOAT
 175         "hf"
 176 #  endif
 177 # endif
 178 #elif defined TCC_TARGET_ARM64
 179         "AArch64"
 180 #elif defined TCC_TARGET_RISCV64
 181         "riscv64"
 182 #endif
 183 #ifdef TCC_TARGET_PE
 184         " Windows"
 185 #elif defined(TCC_TARGET_MACHO)
 186         " Darwin"
 187 #elif TARGETOS_FreeBSD || TARGETOS_FreeBSD_kernel
 188         " FreeBSD"
 189 #elif TARGETOS_OpenBSD
 190         " OpenBSD"
 191 #elif TARGETOS_NetBSD
 192         " NetBSD"
 193 #else
 194         " Linux"
 195 #endif
 196     ")\n"
 197     ;
 198
 199 static void print_dirs(const char *msg, char **paths, int nb_paths)
 200 {
 201     int i;
 202     printf("%s:\n%s", msg, nb_paths ? "" : "  -\n");
 203     for(i = 0; i < nb_paths; i++)
 204         printf("  %s\n", paths[i]);
 205 }
 206
 207 static void print_search_dirs(TCCState *s)
 208 {
 209     printf("install: %s\n", s->tcc_lib_path);
 210     /* print_dirs("programs", NULL, 0); */
 211     print_dirs("include", s->sysinclude_paths, s->nb_sysinclude_paths);
 212     print_dirs("libraries", s->library_paths, s->nb_library_paths);
 213     printf("libtcc1:\n  %s/%s\n", s->library_paths[0], CONFIG_TCC_CROSSPREFIX TCC_LIBTCC1);
 214 #if !defined TCC_TARGET_PE && !defined TCC_TARGET_MACHO
 215     print_dirs("crt", s->crt_paths, s->nb_crt_paths);
 216     printf("elfinterp:\n  %s\n",  DEFAULT_ELFINTERP(s));
 217 #endif
 218 }
 219
 220 static void set_environment(TCCState *s)
 221 {
 222     char * path;
 223
 224     path = getenv("C_INCLUDE_PATH");
 225     if(path != NULL) {
 226         tcc_add_sysinclude_path(s, path);
 227     }
 228     path = getenv("CPATH");
 229     if(path != NULL) {
 230         tcc_add_include_path(s, path);
 231     }
 232     path = getenv("LIBRARY_PATH");
 233     if(path != NULL) {
 234         tcc_add_library_path(s, path);
 235     }
 236 }
 237
 238 static char *default_outputfile(TCCState *s, const char *first_file)
 239 {
 240     char buf[1024];
 241     char *ext;
 242     const char *name = "a";
 243
 244     if (first_file && strcmp(first_file, "-"))
 245         name = tcc_basename(first_file);
 246     snprintf(buf, sizeof(buf), "%s", name);
 247     ext = tcc_fileextension(buf);
 248 #ifdef TCC_TARGET_PE
 249     if (s->output_type == TCC_OUTPUT_DLL)
 250         strcpy(ext, ".dll");
 251     else
 252     if (s->output_type == TCC_OUTPUT_EXE)
 253         strcpy(ext, ".exe");
 254     else
 255 #endif
 256     if ((s->just_deps || s->output_type == TCC_OUTPUT_OBJ) && !s->option_r && *ext)
 257         strcpy(ext, ".o");
 258     else
 259         strcpy(buf, "a.out");
 260     return tcc_strdup(buf);
 261 }
 262
 263 static unsigned getclock_ms(void)
 264 {
 265 #ifdef _WIN32
 266     return GetTickCount();
 267 #else
 268     struct timeval tv;
 269     gettimeofday(&tv, NULL);
 270     return tv.tv_sec*1000 + (tv.tv_usec+500)/1000;
 271 #endif
 272 }
 273
 274 int main(int argc0, char **argv0)
 275 {
 276     TCCState *s, *s1;
 277     int ret, opt, n = 0, t = 0, done;
 278     unsigned start_time = 0, end_time = 0;
 279     const char *first_file;
 280     int argc; char **argv;
 281     FILE *ppfp = stdout;
 282
 283 redo:
 284     argc = argc0, argv = argv0;
 285     s = s1 = tcc_new();
 286 #ifdef CONFIG_TCC_SWITCHES /* predefined options */
 287     tcc_set_options(s, CONFIG_TCC_SWITCHES);
 288 #endif
 289     opt = tcc_parse_args(s, &argc, &argv, 1);
 290     if (opt < 0)
 291         return 1;
 292
 293     if (n == 0) {
 294         if (opt == OPT_HELP) {
 295             fputs(help, stdout);
 296             if (!s->verbose)
 297                 return 0;
 298             ++opt;
 299         }
 300         if (opt == OPT_HELP2) {
 301             fputs(help2, stdout);
 302             return 0;
 303         }
 304         if (opt == OPT_M32 || opt == OPT_M64)
 305             return tcc_tool_cross(s, argv, opt);
 306         if (s->verbose)
 307             printf("%s", version);
 308         if (opt == OPT_AR)
 309             return tcc_tool_ar(s, argc, argv);
 310 #ifdef TCC_TARGET_PE
 311         if (opt == OPT_IMPDEF)
 312             return tcc_tool_impdef(s, argc, argv);
 313 #endif
 314         if (opt == OPT_V)
 315             return 0;
 316         if (opt == OPT_PRINT_DIRS) {
 317             /* initialize search dirs */
 318             set_environment(s);
 319             tcc_set_output_type(s, TCC_OUTPUT_MEMORY);
 320             print_search_dirs(s);
 321             return 0;
 322         }
 323
 324         if (s->nb_files == 0) {
 325             tcc_error_noabort("no input files");
 326         } else if (s->output_type == TCC_OUTPUT_PREPROCESS) {
 327             if (s->outfile && 0!=strcmp("-",s->outfile)) {
 328                 ppfp = fopen(s->outfile, "wb");
 329                 if (!ppfp)
 330                     tcc_error_noabort("could not write '%s'", s->outfile);
 331             }
 332         } else if (s->output_type == TCC_OUTPUT_OBJ && !s->option_r) {
 333             if (s->nb_libraries)
 334                 tcc_error_noabort("cannot specify libraries with -c");
 335             else if (s->nb_files > 1 && s->outfile)
 336                 tcc_error_noabort("cannot specify output file with -c many files");
 337         }
 338         if (s->nb_errors)
 339             return 1;
 340         if (s->do_bench)
 341             start_time = getclock_ms();
 342     }
 343
 344     set_environment(s);
 345     if (s->output_type == 0)
 346         s->output_type = TCC_OUTPUT_EXE;
 347     tcc_set_output_type(s, s->output_type);
 348     s->ppfp = ppfp;
 349
 350     if ((s->output_type == TCC_OUTPUT_MEMORY
 351       || s->output_type == TCC_OUTPUT_PREPROCESS)
 352         && (s->dflag & 16)) { /* -dt option */
 353         if (t)
 354             s->dflag |= 32;
 355         s->run_test = ++t;
 356         if (n)
 357             --n;
 358     }
 359
 360     /* compile or add each files or library */
 361     first_file = NULL;
 362     do {
 363         struct filespec *f = s->files[n];
 364         s->filetype = f->type;
 365         if (f->type & AFF_TYPE_LIB) {
 366             ret = tcc_add_library_err(s, f->name);
 367         } else {
 368             if (1 == s->verbose)
 369                 printf("-> %s\n", f->name);
 370             if (!first_file)
 371                 first_file = f->name;
 372             ret = tcc_add_file(s, f->name);
 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                 ;
 394             else if (s->gen_deps)
 395                 gen_makedeps(s, s->outfile, s->deps_outfile);
 396         }
 397     }
 398
 399     done = 1;
 400     if (t)
 401         done = 0; /* run more tests with -dt -run */
 402     else if (s->nb_errors)
 403         ret = 1;
 404     else if (n < s->nb_files)
 405         done = 0; /* compile more files with -c */
 406     else if (s->do_bench)
 407         tcc_print_stats(s, end_time - start_time);
 408     tcc_delete(s);
 409     if (!done)
 410         goto redo;
 411     if (ppfp && ppfp != stdout)
 412         fclose(ppfp);
 413     return ret;
 414 }