I'm using GLPK 4.8, and I notice that you still require C++ users to
wrap extern "C" { ... } around the headers.
There is an easy way to make this automatic. Just put:
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
at the beginning of your header file and
#ifdef __cplusplus
} /* extern "C" */
#endif /* __cplusplus */
at the end. (This is standard boilerplate that many C header files use
in order to work with C++.)
I think that nesting extern "C" braces is allowed (g++ -pedantic -Wall
allows it), so this shouldn't cause backwards-compatibility problems for
existing C++ code that uses GLPK.
Cordially,
Steven G. Johnson
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