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 #if defined (__ARM_EABI__)
  25 # if defined (__ARM_PCS_VFP)
  26 #  define TRIPLET_ABI "gnueabihf"
  27 # else
  28 #  define TRIPLET_ABI "gnueabi"
  29 # endif
  30 #else
  31 # define TRIPLET_ABI "gnu"
  32 #endif
  33
  34 #ifdef __GNU__
  35 # define TRIPLET TRIPLET_ARCH "-" TRIPLET_ABI
  36 #else
  37 # define TRIPLET TRIPLET_ARCH "-" TRIPLET_OS "-" TRIPLET_ABI
  38 #endif
  39
  40 #if defined(_WIN32)
  41 int _CRT_glob = 0;
  42 #endif
  43
  44 int main(int argc, char *argv[])
  45 {
  46     switch(argc == 2 ? argv[1][0] : 0) {
  47         case 'b':
  48         {
  49             volatile unsigned foo = 0x01234567;
  50             puts(*(unsigned char*)&foo == 0x67 ? "no" : "yes");
  51             break;
  52         }
  53 #ifdef __GNUC__
  54         case 'm':
  55             printf("%d\n", __GNUC_MINOR__);
  56             break;
  57         case 'v':
  58             printf("%d\n", __GNUC__);
  59             break;
  60 #else
  61         case 'm':
  62         case 'v':
  63             puts("0");
  64             break;
  65 #endif
  66         case 't':
  67             puts(TRIPLET);
  68             break;
  69         case -1:
  70             /* to test -Wno-unused-result */
  71             fread(NULL, 1, 1, NULL);
  72             break;
  73     }
  74     return 0;
  75 }