conftest.c

   1 #include <stdio.h>
   2
   3 /* Define architecture */
   4 #if defined(__i386__)
   5 # define TRIPLET_ARCH "i386"
   6 #elif defined(__x86_64__)
   7 # define TRIPLET_ARCH "x86_64"
   8 #elif defined(__arm__)
   9 # define TRIPLET_ARCH "arm"
  10 #else
  11 # define TRIPLET_ARCH "unknown"
  12 #endif
  13
  14 /* Define OS */
  15 #if defined (__linux__)
  16 # define TRIPLET_OS "linux"
  17 #elif defined (__FreeBSD__) || defined (__FreeBSD_kernel__)
  18 # define TRIPLET_OS "kfreebsd"
  19 #elif !defined (__GNU__)
  20 # define TRIPLET_OS "unknown"
  21 #endif
  22
  23 /* Define calling convention and ABI */
  24 #define TRIPLET_ABI "gnu"
  25
  26 #ifdef __GNU__
  27 # define TRIPLET TRIPLET_ARCH "-" TRIPLET_ABI
  28 #else
  29 # define TRIPLET TRIPLET_ARCH "-" TRIPLET_OS "-" TRIPLET_ABI
  30 #endif
  31
  32 int main(int argc, char *argv[])
  33 {
  34     switch(argc == 2 ? argv[1][0] : 0) {
  35         case 'b':
  36         {
  37             volatile unsigned foo = 0x01234567;
  38             puts(*(unsigned char*)&foo == 0x67 ? "no" : "yes");
  39             break;
  40         }
  41 #ifdef __GNUC__
  42         case 'm':
  43             printf("%d\n", __GNUC_MINOR__);
  44             break;
  45         case 'v':
  46             printf("%d\n", __GNUC__);
  47             break;
  48 #else
  49         case 'm':
  50         case 'v':
  51             puts("0");
  52             break;
  53 #endif
  54         case 't':
  55             puts(TRIPLET);
  56             break;
  57         case -1:
  58             /* to test -Wno-unused-result */
  59             fread(NULL, 1, 1, NULL);
  60             break;
  61     }
  62     return 0;
  63 }