/usr/share/cmake-3.5/Modules/CheckFunctionExists.c is in cmake-data 3.5.1-1ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 | #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 */
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