We link against static assimp libraries that are built for each platform and added to the aig/libs package. Depending on the platform we select one of them and link against it when doing go build.

The general steps are:

Copy assimp includes into aig/assimp
Copy zlib.h, zconf.h and irrXML.h into aig/zlib and aig/irrxml respectively.
Copy static libraries into aig/libs
Generate the wrappers using swig -go -c++ -intgosize 64 aig/aig.i
Add #cgo LDFLAGS: -L ./staticLibs -l zlibstatic -l IrrXML -l assimp at the top of the 'C' import in aig.go

Note: When dealing with static libraries the compiler will probably (e.g. MinGW does this) ignore lib suffixes and .a/.lib suffixes. So if your lib name is libassimp.a you need to pass it to CGO as -l assimp, otherwise you will get an error about library not found.

For platform specific steps:

Windows:

Note: You must compile with the same C/C++ compiler you use with Go (e.g. if you use MinGW with Go, then compile assimp with MinGW by sepcifying the correct -G option)

Note: If you get compilation errors with things like File too big or can't write 166 bytes to section then cmake isn't detecting you are using MinGW, so add this flag -D CMAKE_COMPILER_IS_MINGW=TRUE

Now assuming you are using MinGW on windows:

Clone wanted release of assimp and run cmake CMakeLists.txt -D BUILD_SHARED_LIBS=OFF -D ASSIMP_BUILD_ZLIB=ON -D ASSIMP_BUILD_ASSIMP_TOOLS=OFF -D ASSIMP_BUILD_TESTS=OFF -G "MinGW Makefiles" in the root folder
Run cmake --build . --parallel 6
Copy the generated *.lib file into aig/lib