Externals: Add glslang from Vulkan SDK v1.0.21.1

Externals/glslang/StandAlone/CMakeLists.txt

@@ -0,0 +1,48 @@
+add_library(glslang-default-resource-limits
+    ${CMAKE_CURRENT_SOURCE_DIR}/ResourceLimits.cpp
+)
+set_property(TARGET glslang-default-resource-limits PROPERTY FOLDER glslang)
+
+target_include_directories(glslang-default-resource-limits
+    PUBLIC ${CMAKE_CURRENT_SOURCE_DIR}
+    PUBLIC ${PROJECT_SOURCE_DIR}
+)
+
+set(SOURCES StandAlone.cpp)
+set(REMAPPER_SOURCES spirv-remap.cpp)
+
+add_executable(glslangValidator ${SOURCES})
+add_executable(spirv-remap ${REMAPPER_SOURCES})
+set_property(TARGET glslangValidator PROPERTY FOLDER tools)
+set_property(TARGET spirv-remap PROPERTY FOLDER tools)
+glslang_set_link_args(glslangValidator)
+glslang_set_link_args(spirv-remap)
+
+set(LIBRARIES
+    glslang
+    OGLCompiler
+    OSDependent
+    HLSL
+    SPIRV
+    glslang-default-resource-limits)
+
+if(WIN32)
+    set(LIBRARIES ${LIBRARIES} psapi)
+elseif(UNIX)
+    if(NOT ANDROID)
+        set(LIBRARIES ${LIBRARIES} pthread)
+    endif()
+endif(WIN32)
+
+target_link_libraries(glslangValidator ${LIBRARIES})
+target_link_libraries(spirv-remap ${LIBRARIES})
+
+if(WIN32)
+    source_group("Source" FILES ${SOURCES})
+endif(WIN32)
+
+install(TARGETS glslangValidator
+        RUNTIME DESTINATION bin)
+
+install(TARGETS spirv-remap
+        RUNTIME DESTINATION bin)