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 struct w/o identifier\n"
 108     "  dollars-in-identifiers        allow '$' in C symbols\n"
 109     "  old-struct-init-code          some hack for parsing initializers\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     "  -image-base= -Ttext=          set base address of executable\n"
 122     "  -section-alignment=           set section alignment in executable\n"
 123 #ifdef TCC_TARGET_PE
 124     "  -file-alignment=              set PE file alignment\n"
 125     "  -stack=                       set PE stack reserve\n"
 126     "  -large-address-aware          set related PE option\n"
 127     "  -subsystem=[console gui]      set PE subsystem\n"
 128     "  -oformat=[pe-* binary]        set executable output format\n"
 129     "Predefined macros:\n"
 130     "  tcc -E -dM - < nul\n"
 131 #else
 132     "  -rpath=                       set dynamic library seach path\n"
 133     "  -enable-new-dtags             set DT_RUNPATH instead of DT_RPATH\n"
 134     "  -soname=                      set DT_SONAME elf tag\n"
 135     "  -Bsymbolic                    set DT_SYMBOLIC elf tag\n"
 136     "  -oformat=[elf32/64-* binary]  set executable output format\n"
 137     "  -init= -fini= -as-needed -O   (ignored)\n"
 138     "Predefined macros:\n"
 139     "  tcc -E -dM - < /dev/null\n"
 140 #endif
 141     "See also the manual for more details.\n"
 142     ;
 143
 144 static const char version[] =
 145     "tcc version "TCC_VERSION" ("
 146 #ifdef TCC_TARGET_I386
 147         "i386"
 148 #elif defined TCC_TARGET_X86_64
 149         "x86_64"
 150 #elif defined TCC_TARGET_C67
 151         "C67"
 152 #elif defined TCC_TARGET_ARM
 153         "ARM"
 154 # ifdef TCC_ARM_HARDFLOAT
 155         " Hard Float"
 156 # endif
 157 #elif defined TCC_TARGET_ARM64
 158         "AArch64"
 159 # ifdef TCC_ARM_HARDFLOAT
 160         " Hard Float"
 161 # endif
 162 #endif
 163 #ifdef TCC_TARGET_PE
 164         " Windows"
 165 #elif defined(__APPLE__)
 166         /* Current Apple OS name as of 2016 */
 167         " macOS"
 168 #elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
 169         " FreeBSD"
 170 #elif defined(__DragonFly__)
 171         " DragonFly BSD"
 172 #elif defined(__NetBSD__)
 173         " NetBSD"
 174 #elif defined(__OpenBSD__)
 175         " OpenBSD"
 176 #elif defined(__linux__)
 177         " Linux"
 178 #else
 179         " Unidentified system"
 180 #endif
 181     ")\n"
 182     ;
 183
 184 static void print_dirs(const char *msg, char **paths, int nb_paths)
 185 {
 186     int i;
 187     printf("%s:\n%s", msg, nb_paths ? "" : "  -\n");
 188     for(i = 0; i < nb_paths; i++)
 189         printf("  %s\n", paths[i]);
 190 }
 191
 192 static void print_search_dirs(TCCState *s)
 193 {
 194     printf("install: %s\n", s->tcc_lib_path);
 195     /* print_dirs("programs", NULL, 0); */
 196     print_dirs("include", s->sysinclude_paths, s->nb_sysinclude_paths);
 197     print_dirs("libraries", s->library_paths, s->nb_library_paths);
 198 #ifndef TCC_TARGET_PE
 199     print_dirs("crt", s->crt_paths, s->nb_crt_paths);
 200     printf("elfinterp:\n  %s\n",  DEFAULT_ELFINTERP(s));
 201 #endif
 202 }
 203
 204 static char *default_outputfile(TCCState *s, const char *first_file)
 205 {
 206     char buf[1024];
 207     char *ext;
 208     const char *name = "a";
 209
 210     if (first_file && strcmp(first_file, "-"))
 211         name = tcc_basename(first_file);
 212     snprintf(buf, sizeof(buf), "%s", name);
 213     ext = tcc_fileextension(buf);
 214 #ifdef TCC_TARGET_PE
 215     if (s->output_type == TCC_OUTPUT_DLL)
 216         strcpy(ext, ".dll");
 217     else
 218     if (s->output_type == TCC_OUTPUT_EXE)
 219         strcpy(ext, ".exe");
 220     else
 221 #endif
 222     if (s->output_type == TCC_OUTPUT_OBJ && !s->option_r && *ext)
 223         strcpy(ext, ".o");
 224     else
 225         strcpy(buf, "a.out");
 226     return tcc_strdup(buf);
 227 }
 228
 229 static unsigned getclock_ms(void)
 230 {
 231 #ifdef _WIN32
 232     return GetTickCount();
 233 #else
 234     struct timeval tv;
 235     gettimeofday(&tv, NULL);
 236     return tv.tv_sec*1000 + (tv.tv_usec+500)/1000;
 237 #endif
 238 }
 239
 240 int main(int argc, char **argv)
 241 {
 242     TCCState *s;
 243     int ret, opt, n = 0;
 244     unsigned start_time = 0;
 245     const char *first_file;
 246
 247 redo:
 248     s = tcc_new();
 249     opt = tcc_parse_args(s, &argc, &argv, 1);
 250
 251     if (n == 0) {
 252         if (opt == OPT_HELP)
 253             return printf(help), 1;
 254         if (opt == OPT_HELP2)
 255             return printf(help2), 1;
 256         if (opt == OPT_M32 || opt == OPT_M64)
 257             tcc_tool_cross(s, argv, opt); /* never returns */
 258         if (s->verbose)
 259             printf(version);
 260         if (opt == OPT_AR)
 261             return tcc_tool_ar(s, argc, argv);
 262 #ifdef TCC_TARGET_PE
 263         if (opt == OPT_IMPDEF)
 264             return tcc_tool_impdef(s, argc, argv);
 265 #endif
 266         if (opt == OPT_V)
 267             return 0;
 268
 269         tcc_set_environment(s);
 270
 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) {
 291             if (s->nb_libraries != 0 && !s->option_r)
 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     if (s->output_type == 0)
 305         s->output_type = TCC_OUTPUT_EXE;
 306     tcc_set_output_type(s, s->output_type);
 307
 308     /* compile or add each files or library */
 309     for (first_file = NULL, ret = 0;;) {
 310         struct filespec *f = s->files[s->nb_files - n];
 311         s->filetype = f->type;
 312         s->alacarte_link = f->alacarte;
 313         if (f->type == AFF_TYPE_LIB) {
 314             if (tcc_add_library_err(s, f->name) < 0)
 315                 ret = 1;
 316         } else {
 317             if (1 == s->verbose)
 318                 printf("-> %s\n", f->name);
 319             if (!first_file)
 320                 first_file = f->name;
 321             if (tcc_add_file(s, f->name) < 0)
 322                 ret = 1;
 323         }
 324         s->filetype = 0;
 325         s->alacarte_link = 1;
 326         if (ret || --n == 0 || s->output_type == TCC_OUTPUT_OBJ)
 327             break;
 328     }
 329
 330     if (s->output_type == TCC_OUTPUT_PREPROCESS) {
 331         if (s->outfile)
 332             fclose(s->ppfp);
 333     } else if (0 == ret) {
 334         if (s->output_type == TCC_OUTPUT_MEMORY) {
 335 #ifdef TCC_IS_NATIVE
 336             ret = tcc_run(s, argc, argv);
 337 #endif
 338         } else {
 339             if (!s->outfile)
 340                 s->outfile = default_outputfile(s, first_file);
 341             if (tcc_output_file(s, s->outfile))
 342                 ret = 1;
 343             else if (s->gen_deps)
 344                 gen_makedeps(s, s->outfile, s->deps_outfile);
 345         }
 346     }
 347
 348     if (s->do_bench && ret == 0 && n == 0)
 349         tcc_print_stats(s, getclock_ms() - start_time);
 350     tcc_delete(s);
 351     if (ret == 0 && n)
 352         goto redo; /* compile more files with -c */
 353     return ret;
 354 }