Get rid of all warnings with MSVC and clang-cl (#2177)

CMakeLists.txt

@@ -75,7 +75,7 @@ endif()
 
 # Precompiled header macro. Parameters are source file list and filename for pch cpp file.
 macro(glslang_pch SRCS PCHCPP)
-  if(MSVC AND CMAKE_GENERATOR MATCHES "^Visual Studio" AND ENABLE_PCH)
+  if(MSVC AND CMAKE_GENERATOR MATCHES "^Visual Studio" AND NOT ${CMAKE_CXX_COMPILER_ID} MATCHES "Clang" AND ENABLE_PCH)
     set(PCH_NAME "$(IntDir)\\pch.pch")
     # make source files use/depend on PCH_NAME
     set_source_files_properties(${${SRCS}} PROPERTIES COMPILE_FLAGS "/Yupch.h /FIpch.h /Fp${PCH_NAME} /Zm300" OBJECT_DEPENDS "${PCH_NAME}")
@@ -124,14 +124,14 @@ if(${CMAKE_CXX_COMPILER_ID} MATCHES "GNU")
     if(NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS "9.0.0")
         add_compile_options(-Werror=deprecated-copy)
     endif()
-elseif(${CMAKE_CXX_COMPILER_ID} MATCHES "Clang")
+elseif(${CMAKE_CXX_COMPILER_ID} MATCHES "Clang" AND NOT MSVC)
     add_compile_options(-Wall -Wuninitialized -Wunused -Wunused-local-typedefs
                         -Wunused-parameter -Wunused-value  -Wunused-variable)
     add_compile_options(-Wno-reorder)  # disable this from -Wall, since it happens all over.
     if(NOT ENABLE_RTTI)
         add_compile_options(-fno-rtti)
     endif()
-elseif(${CMAKE_CXX_COMPILER_ID} MATCHES "MSVC")
+elseif(MSVC)
     if(NOT ENABLE_RTTI)
         add_compile_options(/GR-) # Disable RTTI
     endif()
@@ -142,7 +142,7 @@ if(ENABLE_GLSLANG_JS)
         add_compile_options(/Os /GR-)
     else()
         add_compile_options(-Os -fno-exceptions)
-        if(${CMAKE_CXX_COMPILER_ID} MATCHES "Clang")
+        if(${CMAKE_CXX_COMPILER_ID} MATCHES "Clang" AND NOT MSVC)
             add_compile_options(-Wno-unused-parameter)
             add_compile_options(-Wno-unused-variable -Wno-unused-const-variable)
         endif()

StandAlone/resource_limits_c.cpp

@@ -37,6 +37,14 @@ const glslang_resource_t* glslang_default_resource(void)
     return reinterpret_cast<const glslang_resource_t*>(&glslang::DefaultTBuiltInResource);
 }
 
+#if defined(__clang__) || defined(__GNUC__)
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
+#elif defined(_MSC_VER)
+#pragma warning(push)
+#pragma warning(disable : 4996)
+#endif
+
 const char* glslang_default_resource_string()
 {
     std::string cpp_str = glslang::GetDefaultTBuiltInResourceString();
@@ -45,6 +53,12 @@ const char* glslang_default_resource_string()
     return c_str;
 }
 
+#if defined(__clang__) || defined(__GNUC__)
+#pragma GCC diagnostic pop
+#elif defined(_MSC_VER)
+#pragma warning(pop)
+#endif
+
 void glslang_decode_resource_limits(glslang_resource_t* resources, char* config)
 {
     glslang::DecodeResourceLimits(reinterpret_cast<TBuiltInResource*>(resources), config);