glslang fails building as shared library on Windows

[mtavenrath]

To reproduce launch a visual studio command prompt and launch the following commands:

cmake -G Ninja -B build-repro -DBUILD_SHARED_LIBS=ON
cmake --build build-repro

This will result in hundreds of linker errors due to missing exports like those below.

StandAlone.cpp.obj : error LNK2019: unresolved external symbol "void __cdecl glslang::OS_DumpMemoryCounters(void)" (?OS_DumpMemoryCounters@glslang@@YAXXZ) referenced in function "void __cdecl CompileFile(char const *,void *)" (?CompileFile@@YAXPEBDPEAX@Z)
StandAlone.cpp.obj : error LNK2019: unresolved external symbol __imp_ShInitialize referenced in function "int __cdecl singleMain(void)" (?singleMain@@YAHXZ)
StandAlone.cpp.obj : error LNK2019: unresolved external symbol __imp_ShFinalize referenced in function "int __cdecl singleMain(void)" (?singleMain@@YAHXZ)
StandAlone.cpp.obj : error LNK2019: unresolved external symbol __imp_ShConstructCompiler referenced in function "void __cdecl CompileShaders(class glslang::TWorklist &)" (?CompileShaders@@YAXAEAVTWorklist@glslang@@@Z)

Using Visual Studio to build the project results in import libraries not being created for SPIRVd.lib because no symbols are being exported.

[greg-lunarg]

Looking at whether a remedy might be pulled from this effort: KhronosGroup/SPIRV-Tools#3909

[greg-lunarg]

Looking into this more, I remembered that shared lib support is WIP. See #2283.

I believe the issue noted above encompasses this issue, so I will close this issue. Please reopen if you believe otherwise.