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 #elif defined(__aarch64__)
  11 # define TRIPLET_ARCH "aarch64"
  12 #else
  13 # define TRIPLET_ARCH "unknown"
  14 #endif
  15
  16 /* Define OS */
  17 #if defined (__linux__)
  18 # define TRIPLET_OS "linux"
  19 #elif defined (__FreeBSD__) || defined (__FreeBSD_kernel__)
  20 # define TRIPLET_OS "kfreebsd"
  21 #elif !defined (__GNU__)
  22 # define TRIPLET_OS "unknown"
  23 #endif
  24
  25 /* Define calling convention and ABI */
  26 #if defined (__ARM_EABI__)
  27 # if defined (__ARM_PCS_VFP)
  28 #  define TRIPLET_ABI "gnueabihf"
  29 # else
  30 #  define TRIPLET_ABI "gnueabi"
  31 # endif
  32 #else
  33 # define TRIPLET_ABI "gnu"
  34 #endif
  35
  36 #ifdef __GNU__
  37 # define TRIPLET TRIPLET_ARCH "-" TRIPLET_ABI
  38 #else
  39 # define TRIPLET TRIPLET_ARCH "-" TRIPLET_OS "-" TRIPLET_ABI
  40 #endif
  41
  42 #if defined(_WIN32)
  43 int _CRT_glob = 0;
  44 #endif
  45
  46 int main(int argc, char *argv[])
  47 {
  48     switch(argc == 2 ? argv[1][0] : 0) {
  49         case 'b':
  50         {
  51             volatile unsigned foo = 0x01234567;
  52             puts(*(unsigned char*)&foo == 0x67 ? "no" : "yes");
  53             break;
  54         }
  55 #ifdef __GNUC__
  56         case 'm':
  57             printf("%d\n", __GNUC_MINOR__);
  58             break;
  59         case 'v':
  60             printf("%d\n", __GNUC__);
  61             break;
  62 #else
  63         case 'm':
  64         case 'v':
  65             puts("0");
  66             break;
  67 #endif
  68         case 't':
  69             puts(TRIPLET);
  70             break;
  71         case -1:
  72             /* to test -Wno-unused-result */
  73             fread(NULL, 1, 1, NULL);
  74             break;
  75     }
  76     return 0;
  77 }