tools-for-build/os-provides-dladdr-test.c

   1 /* test to build and run so that we know if we have dladdr
   2  */
   3
   4 /* bloody FSF dlcfn.h won't give us dladdr without this */
   5 #define _GNU_SOURCE
   6
   7 #include <stdlib.h>
   8 #include <dlfcn.h>
   9
  10 #ifdef __NetBSD__
  11 #include <sys/param.h>
  12 #endif
  13
  14 int main ()
  15 {
  16 #if defined(__NetBSD_Version__) && __NetBSD_Version__ < 700000001
  17   /* dladdr(3) is broken on some NetBSD versions before 7.0 */
  18   return 1;
  19 #else
  20    void * handle = dlopen((void*)0, RTLD_GLOBAL | RTLD_NOW);
  21    void * addr = dlsym(handle, "printf");
  22    Dl_info * info = (Dl_info*) malloc(sizeof(Dl_info));
  23    if (dladdr(addr, info) == 0) {
  24        return 1;
  25    } else {
  26        return 104;
  27    }
  28 #endif
  29 }