cmake/CheckSharedFunctionExists.c

   1 #ifdef CHECK_SHARED_FUNCTION_EXISTS
   2
   3 #include <stdlib.h>
   4
   5 #ifndef CALLSTACK
   6 #define CALLSTACK
   7 #endif
   8
   9 #ifdef _WIN32
  10 #ifdef ARGSTACK
  11 char __stdcall CHECK_SHARED_FUNCTION_EXISTS(ARGSTACK);
  12 #else
  13 char __stdcall CHECK_SHARED_FUNCTION_EXISTS(void);
  14 #endif
  15 #else
  16 char CHECK_SHARED_FUNCTION_EXISTS();
  17 #endif
  18
  19 #ifdef __CLASSIC_C__
  20 int main(){
  21   int ac;
  22   char*av[];
  23 #else
  24 int main(int ac, char*av[]){
  25 #endif
  26   CHECK_SHARED_FUNCTION_EXISTS(CALLSTACK);
  27   if(ac > 1000)
  28     {
  29     return *av[0];
  30     }
  31   return 0;
  32 }
  33
  34 #else  /* CHECK_SHARED_FUNCTION_EXISTS */
  35
  36 #  error "CHECK_SHARED_FUNCTION_EXISTS has to specify the function"
  37
  38 #endif /* CHECK_SHARED_FUNCTION_EXISTS */