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CMake: Fix unity build for qtgraphs

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qtgraphs defines a target in one directory, and then calls
qt_internal_extend_target with NO_UNITY_BUILD_SOURCES in another
subdirectory scope. That in turn calls set_source_files_properties
but only for the latter subdirectory, and not the main target
directory.

Because CMake has per-directory-scope source file properties, the
'no unity sources' option was effectively ignored.

When using CMake 3.18, make sure to specify the TARGET_DIRECTORY
option so that the source file properties are added to the scope of
the defining target.

Pick-to: 6.6 6.5
Change-Id: I4190d4073a2955aa7053b5faaaa57f683bc768a2
Reviewed-by: Joerg Bornemann <joerg.bornemann@qt.io>
(cherry picked from commit 081e50d768114aeeb8f0d284989986d4debc6ec3)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>
This commit is contained in:
Alexandru Croitor 2024-01-23 13:40:26 +01:00 committed by Qt Cherry-pick Bot
parent 3ab3051100
commit dcaab5eb8d
1 changed files with 9 additions and 2 deletions
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11
cmake/QtUnityBuildHelpers.cmake
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@ -11,7 +11,14 @@ function(_qt_internal_validate_no_unity_build prefix)
endfunction()
function(qt_update_ignore_unity_build_sources target sources)
if (sources)
set_source_files_properties(${sources} PROPERTIES SKIP_UNITY_BUILD_INCLUSION ON)
if(sources)
# We need to add the TARGET_DIRECTORY scope for targets that have qt_internal_extend_target
# calls in different subdirectories, like in qtgraphs.
set(scope_args)
if(CMAKE_VERSION VERSION_GREATER_EQUAL "3.18")
set(scope_args TARGET_DIRECTORY ${target})
endif()
set_source_files_properties(${sources} ${scope_args}
PROPERTIES SKIP_UNITY_BUILD_INCLUSION ON)
endif()
endfunction()