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 #include "tcctools.c"
  27
  28 static const char help[] =
  29     "Tiny C Compiler "TCC_VERSION" - Copyright (C) 2001-2006 Fabrice Bellard\n"
  30     "Usage: tcc [options...] [-o outfile] [-c] infile(s)...\n"
  31     "       tcc [options...] -run infile [arguments...]\n"
  32     "General options:\n"
  33     "  -c          compile only - generate an object file\n"
  34     "  -o outfile  set output filename\n"
  35     "  -run        run compiled source\n"
  36     "  -fflag      set or reset (with 'no-' prefix) 'flag' (see tcc -hh)\n"
  37     "  -Wwarning   set or reset (with 'no-' prefix) 'warning' (see tcc -hh)\n"
  38     "  -w          disable all warnings\n"
  39     "  -v -vv      show version, 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 runtime debug info\n"
  59 #ifdef CONFIG_TCC_BCHECK
  60     "  -b          compile with built-in memory and bounds checker (implies -g)\n"
  61 #endif
  62 #ifdef CONFIG_TCC_BACKTRACE
  63     "  -bt N       show N callers in stack traces\n"
  64 #endif
  65     "Misc. options:\n"
  66     "  -x[c|a|n]   specify type of the next infile\n"
  67     "  -nostdinc   do not use standard system include paths\n"
  68     "  -nostdlib   do not link with standard crt and libraries\n"
  69     "  -Bdir       set tcc's private include/library dir\n"
  70     "  -MD         generate dependency file for make\n"
  71     "  -MF file    specify dependency file name\n"
  72     "  -m32/64     defer to i386/x86_64 cross compiler\n"
  73     "Tools:\n"
  74     "  create library  : tcc -ar [rcsv] lib.a files\n"
  75 #ifdef TCC_TARGET_PE
  76     "  create def file : tcc -impdef lib.dll [-v] [-o lib.def]\n"
  77 #endif
  78     ;
  79
  80 static const char help2[] =
  81     "Tiny C Compiler "TCC_VERSION" - More Options\n"
  82     "Special options:\n"
  83     "  -P -P1                        with -E: no/alternative #line output\n"
  84     "  -dD -dM                       with -E: output #define directives\n"
  85     "  -pthread                      same as -D_REENTRANT and -lpthread\n"
  86     "  -On                           same as -D__OPTIMIZE__ for n > 0\n"
  87     "  -Wp,-opt                      same as -opt\n"
  88     "  -include file                 include 'file' above each input file\n"
  89     "  -isystem dir                  add 'dir' to system include path\n"
  90     "  -iwithprefix dir              set tcc's private include/library subdir\n"
  91     "  -static                       link to static libraries (not recommended)\n"
  92     "  -dumpversion                  print version\n"
  93     "  -print-search-dirs            print search paths\n"
  94     "Ignored options:\n"
  95     "  --param  -pedantic  -pipe  -s  -std  -traditional\n"
  96     "-W... warnings:\n"
  97     "  all                           turn on some (*) warnings\n"
  98     "  error                         stop after first warning\n"
  99     "  unsupported                   warn about ignored options, pragmas, etc.\n"
 100     "  write-strings                 strings are const\n"
 101     "  implicit-function-declaration   warn for missing prototype (*)\n"
 102     "-f[no-]... flags:\n"
 103     "  unsigned-char                 default char is unsigned\n"
 104     "  signed-char                   default char is signed\n"
 105     "  common                        use common section instead of bss\n"
 106     "  leading-underscore            decorate extern symbols\n"
 107     "  ms-extensions                 allow anonymous struct in struct\n"
 108     "  dollars-in-identifiers        allow '$' in C symbols\n"
 109     "-m... target specific options:\n"
 110     "  ms-bitfields                  use MSVC bitfield layout\n"
 111 #ifdef TCC_TARGET_ARM
 112     "  float-abi                     hard/softfp on arm\n"
 113 #endif
 114 #ifdef TCC_TARGET_X86_64
 115     "  no-sse                        disable floats on x86_64\n"
 116 #endif
 117     "-Wl,... linker options:\n"
 118     "  -nostdlib                     do not link with standard crt/libs\n"
 119     "  -[no-]whole-archive           load lib(s) fully/only as needed\n"
 120     "  -image-base= -Ttext=          set base address of executable\n"
 121     "  -section-alignment=           set section alignment in executable\n"
 122 #ifdef TCC_TARGET_PE
 123     "  -file-alignment=              set PE file alignment\n"
 124     "  -stack=                       set PE stack reserve\n"
 125     "  -large-address-aware          set related PE option\n"
 126     "  -subsystem=[console gui]      set PE subsystem\n"
 127     "  -oformat=[pe-* binary]        set executable output format\n"
 128     "Predefined macros:\n"
 129     "  tcc -E -dM - < nul\n"
 130 #else
 131     "  -rpath=                       set dynamic library seach path\n"
 132     "  -enable-new-dtags             set DT_RUNPATH instead of DT_RPATH\n"
 133     "  -soname=                      set DT_SONAME elf tag\n"
 134     "  -Bsymbolic                    set DT_SYMBOLIC elf tag\n"
 135     "  -oformat=[elf32/64-* binary]  set executable output format\n"
 136     "  -init= -fini= -as-needed -O   (ignored)\n"
 137     "Predefined macros:\n"
 138     "  tcc -E -dM - < /dev/null\n"
 139 #endif
 140     "See also the manual for more details.\n"
 141     ;
 142
 143 static const char version[] =
 144     "tcc version "TCC_VERSION" ("
 145 #ifdef TCC_TARGET_I386
 146         "i386"
 147 #elif defined TCC_TARGET_X86_64
 148         "x86_64"
 149 #elif defined TCC_TARGET_C67
 150         "C67"
 151 #elif defined TCC_TARGET_ARM
 152         "ARM"
 153 #elif defined TCC_TARGET_ARM64
 154         "AArch64"
 155 #endif
 156 #ifdef TCC_ARM_HARDFLOAT
 157         " Hard Float"
 158 #endif
 159 #ifdef TCC_TARGET_PE
 160         " Windows"
 161 #elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
 162         " FreeBSD"
 163 #else
 164         " Linux"
 165 #endif
 166     ")\n"
 167     ;
 168
 169 static void print_dirs(const char *msg, char **paths, int nb_paths)
 170 {
 171     int i;
 172     printf("%s:\n%s", msg, nb_paths ? "" : "  -\n");
 173     for(i = 0; i < nb_paths; i++)
 174         printf("  %s\n", paths[i]);
 175 }
 176
 177 static void print_search_dirs(TCCState *s)
 178 {
 179     printf("install: %s\n", s->tcc_lib_path);
 180     /* print_dirs("programs", NULL, 0); */
 181     print_dirs("include", s->sysinclude_paths, s->nb_sysinclude_paths);
 182     print_dirs("libraries", s->library_paths, s->nb_library_paths);
 183 #ifndef TCC_TARGET_PE
 184     print_dirs("crt", s->crt_paths, s->nb_crt_paths);
 185     printf("elfinterp:\n  %s\n",  DEFAULT_ELFINTERP(s));
 186 #endif
 187 }
 188
 189 static void set_environment(TCCState *s)
 190 {
 191     char * path;
 192
 193     path = getenv("C_INCLUDE_PATH");
 194     if(path != NULL) {
 195         tcc_add_include_path(s, path);
 196     }
 197     path = getenv("CPATH");
 198     if(path != NULL) {
 199         tcc_add_include_path(s, path);
 200     }
 201     path = getenv("LIBRARY_PATH");
 202     if(path != NULL) {
 203         tcc_add_library_path(s, path);
 204     }
 205 }
 206
 207 static char *default_outputfile(TCCState *s, const char *first_file)
 208 {
 209     char buf[1024];
 210     char *ext;
 211     const char *name = "a";
 212
 213     if (first_file && strcmp(first_file, "-"))
 214         name = tcc_basename(first_file);
 215     snprintf(buf, sizeof(buf), "%s", name);
 216     ext = tcc_fileextension(buf);
 217 #ifdef TCC_TARGET_PE
 218     if (s->output_type == TCC_OUTPUT_DLL)
 219         strcpy(ext, ".dll");
 220     else
 221     if (s->output_type == TCC_OUTPUT_EXE)
 222         strcpy(ext, ".exe");
 223     else
 224 #endif
 225     if (s->output_type == TCC_OUTPUT_OBJ && !s->option_r && *ext)
 226         strcpy(ext, ".o");
 227     else
 228         strcpy(buf, "a.out");
 229     return tcc_strdup(buf);
 230 }
 231
 232 static unsigned getclock_ms(void)
 233 {
 234 #ifdef _WIN32
 235     return GetTickCount();
 236 #else
 237     struct timeval tv;
 238     gettimeofday(&tv, NULL);
 239     return tv.tv_sec*1000 + (tv.tv_usec+500)/1000;
 240 #endif
 241 }
 242
 243 int main(int argc, char **argv)
 244 {
 245     TCCState *s;
 246     int ret, opt, n = 0;
 247     unsigned start_time = 0;
 248     const char *first_file;
 249
 250 redo:
 251     s = tcc_new();
 252     opt = tcc_parse_args(s, &argc, &argv, 1);
 253
 254     if (n == 0) {
 255         if (opt == OPT_HELP)
 256             return printf(help), 1;
 257         if (opt == OPT_HELP2)
 258             return printf(help2), 1;
 259         if (opt == OPT_M32 || opt == OPT_M64)
 260             tcc_tool_cross(s, argv, opt); /* never returns */
 261         if (s->verbose)
 262             printf(version);
 263         if (opt == OPT_AR)
 264             return tcc_tool_ar(s, argc, argv);
 265 #ifdef TCC_TARGET_PE
 266         if (opt == OPT_IMPDEF)
 267             return tcc_tool_impdef(s, argc, argv);
 268 #endif
 269         if (opt == OPT_V)
 270             return 0;
 271         if (opt == OPT_PRINT_DIRS) {
 272             /* initialize search dirs */
 273             tcc_set_output_type(s, TCC_OUTPUT_MEMORY);
 274             print_search_dirs(s);
 275             return 0;
 276         }
 277
 278         n = s->nb_files;
 279         if (n == 0)
 280             tcc_error("no input files\n");
 281
 282         if (s->output_type == TCC_OUTPUT_PREPROCESS) {
 283             if (!s->outfile) {
 284                 s->ppfp = stdout;
 285             } else {
 286                 s->ppfp = fopen(s->outfile, "w");
 287                 if (!s->ppfp)
 288                     tcc_error("could not write '%s'", s->outfile);
 289             }
 290         } else if (s->output_type == TCC_OUTPUT_OBJ && !s->option_r) {
 291             if (s->nb_libraries)
 292                 tcc_error("cannot specify libraries with -c");
 293             if (n > 1 && s->outfile)
 294                 tcc_error("cannot specify output file with -c many files");
 295         } else {
 296             if (s->option_pthread)
 297                 tcc_set_options(s, "-lpthread");
 298         }
 299
 300         if (s->do_bench)
 301             start_time = getclock_ms();
 302     }
 303
 304     set_environment(s);
 305     if (s->output_type == 0)
 306         s->output_type = TCC_OUTPUT_EXE;
 307     tcc_set_output_type(s, s->output_type);
 308
 309     /* compile or add each files or library */
 310     for (first_file = NULL, ret = 0;;) {
 311         struct filespec *f = s->files[s->nb_files - n];
 312         s->filetype = f->type;
 313         s->alacarte_link = f->alacarte;
 314         if (f->type == AFF_TYPE_LIB) {
 315             if (tcc_add_library_err(s, f->name) < 0)
 316                 ret = 1;
 317         } else {
 318             if (1 == s->verbose)
 319                 printf("-> %s\n", f->name);
 320             if (!first_file)
 321                 first_file = f->name;
 322             if (tcc_add_file(s, f->name) < 0)
 323                 ret = 1;
 324         }
 325         s->filetype = 0;
 326         s->alacarte_link = 1;
 327         if (ret || --n == 0
 328             || (s->output_type == TCC_OUTPUT_OBJ && !s->option_r))
 329             break;
 330     }
 331
 332     if (s->output_type == TCC_OUTPUT_PREPROCESS) {
 333         if (s->outfile)
 334             fclose(s->ppfp);
 335     } else if (0 == ret) {
 336         if (s->output_type == TCC_OUTPUT_MEMORY) {
 337 #ifdef TCC_IS_NATIVE
 338             ret = tcc_run(s, argc, argv);
 339 #endif
 340         } else {
 341             if (!s->outfile)
 342                 s->outfile = default_outputfile(s, first_file);
 343             if (tcc_output_file(s, s->outfile))
 344                 ret = 1;
 345             else if (s->gen_deps)
 346                 gen_makedeps(s, s->outfile, s->deps_outfile);
 347         }
 348     }
 349
 350     if (s->do_bench && ret == 0 && n == 0)
 351         tcc_print_stats(s, getclock_ms() - start_time);
 352     tcc_delete(s);
 353     if (ret == 0 && n)
 354         goto redo; /* compile more files with -c */
 355     return ret;
 356 }