/usr/share/cmake-2.8/Modules/CheckVariableExists.c is in cmake-data 2.8.12.2-0ubuntu3.
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 | #ifdef CHECK_VARIABLE_EXISTS
extern int CHECK_VARIABLE_EXISTS;
#ifdef __CLASSIC_C__
int main(){
int ac;
char*av[];
#else
int main(int ac, char*av[]){
#endif
if(ac > 1000){return *av[0];}
return CHECK_VARIABLE_EXISTS;
}
#else /* CHECK_VARIABLE_EXISTS */
# error "CHECK_VARIABLE_EXISTS has to specify the variable"
#endif /* CHECK_VARIABLE_EXISTS */
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