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Improve clang-cl support for Qt6

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1. clang-cl doesn't support "-fno-exceptions", it uses msvc's parameter.
2. some parameters supported by msvc are not supported by clang-cl
and they are causing huge warning message flood, don't add them.
3. use correct optimize parameter for clang-cl.

Change-Id: Idbadf139127143c5fa6c49068588cb26f47da7a2
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
This commit is contained in:
Yuhang Zhao 2020-11-02 12:36:14 +08:00
parent 2b4a581f34
commit 4b694032df
3 changed files with 26 additions and 10 deletions
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5
cmake/QtCompilerOptimization.cmake
View File

@ -158,6 +158,11 @@ if(MSVC)
set(QT_CFLAGS_OPTIMIZE_DEBUG "-Od")
set(QT_CFLAGS_OPTIMIZE_SIZE "-O1")
set(QT_CFLAGS_OPTIMIZE_VALID_VALUES "/O2" "/O1" "/Od" "/Ob0" "/Ob1" "/Ob2" "/O0" "-O0")
if(CLANG)
set(QT_CFLAGS_OPTIMIZE_FULL "/clang:-O3")
set(QT_CFLAGS_OPTIMIZE_SIZE "/clang:-Oz")
endif()
endif()
# Android Clang

21
cmake/QtFlagHandlingHelpers.cmake
View File

@ -92,7 +92,7 @@ function(qt_internal_apply_gc_binaries target visibility)
message(FATAL_ERROR "Visibitily setting must be one of PRIVATE, INTERFACE or PUBLIC.")
endif()
if ((GCC OR CLANG) AND NOT EMSCRIPTEN AND NOT UIKIT)
if ((GCC OR CLANG) AND NOT EMSCRIPTEN AND NOT UIKIT AND NOT MSVC)
if(APPLE)
set(gc_sections_flag "-Wl,-dead_strip")
elseif(SOLARIS)
@ -105,7 +105,7 @@ function(qt_internal_apply_gc_binaries target visibility)
target_link_options("${target}" ${visibility} "${gc_sections_flag}")
endif()
if((GCC OR CLANG OR ICC) AND NOT EMSCRIPTEN AND NOT UIKIT)
if((GCC OR CLANG OR ICC) AND NOT EMSCRIPTEN AND NOT UIKIT AND NOT MSVC)
set(split_sections_flags "-ffunction-sections" "-fdata-sections")
endif()
if(split_sections_flags)
@ -149,15 +149,22 @@ endfunction()
function(qt_internal_set_no_exceptions_flags target)
target_compile_definitions("${target}" PRIVATE "QT_NO_EXCEPTIONS")
if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "MSVC")
target_compile_options("${target}" PRIVATE "/wd4530" "/wd4577")
set(_flag "/wd4530" "/wd4577")
elseif ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
target_compile_options("${target}" PRIVATE "-fno-exceptions")
set(_flag "-fno-exceptions")
elseif ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "AppleClang")
target_compile_options("${target}" PRIVATE "-fno-exceptions")
set(_flag "-fno-exceptions")
elseif ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
target_compile_options("${target}" PRIVATE "-fno-exceptions")
if (MSVC)
set(_flag "/wd4530" "/wd4577")
else()
set(_flag "-fno-exceptions")
endif()
elseif ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Intel")
target_compile_options("${target}" PRIVATE "-fno-exceptions")
set(_flag "-fno-exceptions")
endif()
if (_flag)
target_compile_options("${target}" PRIVATE ${_flag})
endif()
endfunction()

10
cmake/QtInternalTargets.cmake
View File

@ -178,15 +178,19 @@ if (MSVC)
if (MSVC_VERSION GREATER_EQUAL 1899)
target_compile_options(PlatformCommonInternal INTERFACE
-Zc:strictStrings
-Zc:throwingNew
)
if (NOT CLANG)
target_compile_options(PlatformCommonInternal INTERFACE
-Zc:throwingNew
)
endif()
endif()
if (MSVC_VERSION GREATER_EQUAL 1909)
if (MSVC_VERSION GREATER_EQUAL 1909 AND NOT CLANG)
target_compile_options(PlatformCommonInternal INTERFACE
-Zc:referenceBinding
)
endif()
if (MSVC_VERSION GREATER_EQUAL 1919)
if (MSVC_VERSION GREATER_EQUAL 1919 AND NOT CLANG)
target_compile_options(PlatformCommonInternal INTERFACE
-Zc:externConstexpr
)