A global function may be declared inline. If you use the same function in different development environments, e.g., C and C++, you can hide the “inline” keyword from a C compiler while keeping it visible to a C++ compiler like this:
#ifndef __cplusplus#define inline#endifThe preprocessor directives make sure that only a C++ compiler sees the inline keyword:
inline int get_dst() {return dst; }// inline not seen by C
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