Externals: Add glslang from Vulkan SDK v1.0.21.1

Externals/glslang/CMakeLists.txt

@@ -0,0 +1,58 @@
+set(SRCS
+	glslang/GenericCodeGen/CodeGen.cpp
+	glslang/GenericCodeGen/Link.cpp
+	glslang/MachineIndependent/Constant.cpp
+	glslang/MachineIndependent/glslang_tab.cpp
+	glslang/MachineIndependent/InfoSink.cpp
+	glslang/MachineIndependent/Initialize.cpp
+	glslang/MachineIndependent/Intermediate.cpp
+	glslang/MachineIndependent/intermOut.cpp
+	glslang/MachineIndependent/IntermTraverse.cpp
+	glslang/MachineIndependent/limits.cpp
+	glslang/MachineIndependent/linkValidate.cpp
+	glslang/MachineIndependent/parseConst.cpp
+	glslang/MachineIndependent/ParseHelper.cpp
+	glslang/MachineIndependent/PoolAlloc.cpp
+	glslang/MachineIndependent/preprocessor/Pp.cpp
+	glslang/MachineIndependent/preprocessor/PpAtom.cpp
+	glslang/MachineIndependent/preprocessor/PpContext.cpp
+	glslang/MachineIndependent/preprocessor/PpMemory.cpp
+	glslang/MachineIndependent/preprocessor/PpScanner.cpp
+	glslang/MachineIndependent/preprocessor/PpSymbols.cpp
+	glslang/MachineIndependent/preprocessor/PpTokens.cpp
+	glslang/MachineIndependent/propagateNoContraction.cpp
+	glslang/MachineIndependent/reflection.cpp
+	glslang/MachineIndependent/RemoveTree.cpp
+	glslang/MachineIndependent/Scan.cpp
+	glslang/MachineIndependent/ShaderLang.cpp
+	glslang/MachineIndependent/SymbolTable.cpp
+	glslang/MachineIndependent/Versions.cpp
+	glslang/OSDependent/Unix/ossource.cpp
+	hlsl/hlslGrammar.cpp
+	hlsl/hlslOpMap.cpp
+	hlsl/hlslParseables.cpp
+	hlsl/hlslParseHelper.cpp
+	hlsl/hlslScanContext.cpp
+	hlsl/hlslTokenStream.cpp
+	OGLCompilersDLL/InitializeDll.cpp
+	SPIRV/disassemble.cpp
+	SPIRV/doc.cpp
+	SPIRV/GlslangToSpv.cpp
+	SPIRV/InReadableOrder.cpp
+	SPIRV/Logger.cpp
+	SPIRV/SpvBuilder.cpp
+	SPIRV/SPVRemapper.cpp
+)
+
+# glslang requires C++11 at a minimum to compile.
+add_definitions(-std=c++11)
+
+# Silence some warnings that occur frequently to reduce noise in build logs.
+add_definitions(-Wno-shadow)
+add_definitions(-Wno-reorder)
+add_definitions(-Wno-sign-compare)
+add_definitions(-Wno-parentheses)
+add_definitions(-Wno-unused-variable)
+
+add_library(glslang STATIC ${SRCS})
+