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Use CMake's builtin functionality for PCHs

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`glslang_pch()` did manual mangling of the compiler flags to enable pre-compiled headers.
I couldn't get this approach to work with the `MachineIndependent` subdirectory, but fortunately CMake has added first-class support for precompiled headers in 3.16, which does work with subdirectories.

Moved `glslang_pch()` to the other global function declarations.

`glslang_pch()` is a no-op when using CMake earlier than `3.16`.

CMake's PCH implementation does not need the `pch.cpp` files, so just remove them.
This commit is contained in:
Ben Clayton 2020-07-07 13:24:04 +01:00
parent 3604be156c
commit 31cad22758
7 changed files with 15 additions and 121 deletions
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2
glslang/CMakeLists.txt
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@ -133,7 +133,7 @@ endif(ENABLE_HLSL)
add_library(MachineIndependent STATIC ${MACHINEINDEPENDENT_SOURCES} ${MACHINEINDEPENDENT_HEADERS})
set_property(TARGET MachineIndependent PROPERTY POSITION_INDEPENDENT_CODE ON)
set_property(TARGET MachineIndependent PROPERTY FOLDER glslang)
glslang_pch(SOURCES MachineIndependent/pch.cpp)
glslang_pch(MachineIndependent MachineIndependent/pch.h)
target_link_libraries(MachineIndependent PRIVATE OGLCompiler OSDependent GenericCodeGen)