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CMake: Fix build with Clang on Windows

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win32-clang-g++/qmake.conf did define

  QMAKE_CFLAGS_WARN_ON   += -Wextra -Wno-ignored-attributes

probably for the same reason.

Change-Id: I14b66f2555949c03a2ea996923e31f5ec9f7105a
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
This commit is contained in:
Kai Koehne 2020-09-07 13:14:26 +02:00
parent 3674791ba8
commit 199d867820
1 changed files with 6 additions and 0 deletions
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6
cmake/QtInternalTargets.cmake
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@ -6,6 +6,12 @@ function(qt_internal_set_warnings_are_errors_flags target)
if (CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL "3.0.0")
list(APPEND flags -Werror -Wno-error=\#warnings -Wno-error=deprecated-declarations)
endif()
if(CMAKE_HOST_SYSTEM_NAME STREQUAL "Windows")
# Clang will otherwise show error about inline method conflicting with dllimport class attribute in tools
# (this was tested with Clang 10)
# error: 'QString::operator[]' redeclared inline; 'dllimport' attribute ignored [-Werror,-Wignored-attributes]
list(APPEND flags -Wno-ignored-attributes)
endif()
elseif ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "AppleClang")
# using AppleClang
# Apple clang 4.0+