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