Comment by kccqzy
17 hours ago
Yeah plenty of headers first have `#ifdef __cplusplus` and then they add `extern "C"`. And of course even then they have to avoid doing things unacceptable in C++ such as using "new" as the name of a variable.
It takes a little bit of an effort to make a header work on C and C++. A lot less effort than making a single Python file work with Python 2 and 3.
The '#ifdef __cplusplus extern "C" { }' thing only removes C++ name mangling from exported symbols, it doesn't switch the C++ language into "C mode" (unfortunately).