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CMake: Enable using clang-cl on windows 

detect clang with MSVC frontend using CMAKE_CXX_COMPILER_FRONTEND_VARIANT
pull/1651/head
Samuel Nicholas 2024-12-05 09:35:32 +10:30
parent ce66e6bb39
commit ef9778a392
2 changed files with 26 additions and 4 deletions
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1
CMakeLists.txt
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@ -50,6 +50,7 @@ project( godot-cpp
HOMEPAGE_URL "https://github.com/godotengine/godot-cpp" HOMEPAGE_URL "https://github.com/godotengine/godot-cpp"
LANGUAGES CXX) LANGUAGES CXX)
compiler_detection()
godotcpp_generate() godotcpp_generate()
# Test Example # Test Example

29
cmake/common_compiler_flags.cmake
View File

@ -2,9 +2,10 @@
Common Compiler Flags Common Compiler Flags
--------------------- ---------------------
This file contains a single function to configure platform agnostic compiler This file contains host platform toolchain and target platform agnostic
flags like optimization levels, warnings, and features. For platform specific configuration. It includes flags like optimization levels, warnings, and
flags look to each of the ``cmake/<platform>.cmake`` files. features. For target platform specific flags look to each of the
``cmake/<platform>.cmake`` files.
]=======================================================================] ]=======================================================================]
@ -24,6 +25,25 @@ set( GNU_GT_V11 "$<VERSION_GREATER_EQUAL:$<CXX_COMPILER_VERSION>,11>" )
set( GNU_LT_V11 "$<VERSION_LESS:$<CXX_COMPILER_VERSION>,11>" ) set( GNU_LT_V11 "$<VERSION_LESS:$<CXX_COMPILER_VERSION>,11>" )
set( GNU_GE_V12 "$<VERSION_GREATER_EQUAL:$<CXX_COMPILER_VERSION>,12>" ) set( GNU_GE_V12 "$<VERSION_GREATER_EQUAL:$<CXX_COMPILER_VERSION>,12>" )
#[[ Check for clang-cl with MSVC frontend
The compiler is tested and set when the project command is called.
The variable CXX_COMPILER_FRONTEND_VARIANT was introduced in 3.14
The generator expression $<CXX_COMPILER_FRONTEND_VARIANT> wasn't introduced
until CMake 3.30 so we can't use it yet.
So to support clang downloaded from llvm.org which uses the MSVC frontend
by default, we need to test for it. ]]
function( compiler_detection )
if( ${CMAKE_CXX_COMPILER_ID} STREQUAL Clang )
if( ${CMAKE_CXX_COMPILER_FRONTEND_VARIANT} STREQUAL MSVC )
message( "Using clang-cl" )
set( IS_CLANG "0" PARENT_SCOPE )
set( IS_MSVC "1" PARENT_SCOPE )
set( NOT_MSVC "0" PARENT_SCOPE )
endif ()
endif ()
endfunction( )
function( common_compiler_flags TARGET_NAME ) function( common_compiler_flags TARGET_NAME )
target_compile_features(${TARGET_NAME} target_compile_features(${TARGET_NAME}
@ -60,7 +80,8 @@ function( common_compiler_flags TARGET_NAME )
# MSVC only # MSVC only
$<${IS_MSVC}: $<${IS_MSVC}:
"/MP ${PROC_N}" # /MP isn't valid for clang-cl with msvc frontend
$<$<CXX_COMPILER_ID:MSVC>:/MP${PROC_N}>
/W4 /W4
# Disable warnings which we don't plan to fix. # Disable warnings which we don't plan to fix.