[Linuxsampler-devel] libgig version macro

[Dalton M. <mes...@gm...>]

Hello,

It seems that there is no way to determine the libgig library version at
preprocessing time in order to conditionally use newer methods and avoid
deprecated methods.

This is an important missing feature for a library, and its absence forces
developers to use hacky build system workarounds like this one that uses
CMake to compile a small program that prints `gig::libraryVersion()`,
parses the output, and creates a config header based on the results:

https://github.com/LMMS/lmms/blob/dfa32440dc47d1758101092d6022316b0a85df7c/cmake/modules/FindGig.cmake#L16:L25
https://github.com/LMMS/lmms/blob/dfa32440dc47d1758101092d6022316b0a85df7c/plugins/GigPlayer/CMakeLists.txt#L6-L17

But even then, this workaround is broken on MSVC apparently.

If instead, macros like these were added to gig.h...

#define LIBGIG_VERSION_MAJOR 4
#define LIBGIG_VERSION_MINOR 5
#define LIBGIG_VERSION_REVISION 1

...the problem would be solved from the next libgig version onward.

Thanks,
Dalton