Example

#ifdef CONST #include <header.h> #endif #ifdef XPLATOFRM #include <xplatform.h> #endif int main(int argc, char* argv[]) { return 0; }

Solution

Avoid putting #include in #ifdef blocks if possible in order to have more portable code. #include <header.h> #ifdef XPLATOFRM//necessary #include <xplatform.h> #endif int main(int argc, char* argv[]) { return 0; }