CMake/Modules/CheckFunctionExists.c

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#ifdef CHECK_FUNCTION_EXISTS
#ifdef __cplusplus
extern "C"
#endif
char
CHECK_FUNCTION_EXISTS();
#ifdef __CLASSIC_C__
int main()
{
int ac;
char* av[];
#else
int main(int ac, char* av[])
{
#endif
CHECK_FUNCTION_EXISTS();
if (ac > 1000) {
return *av[0];
}
return 0;
}
#else /* CHECK_FUNCTION_EXISTS */
#error "CHECK_FUNCTION_EXISTS has to specify the function"
#endif /* CHECK_FUNCTION_EXISTS */