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macOS: Prevent warnings about object files without any symbols

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Change-Id: I0860b95cd75f536ff20defde97c3df7dc78a1e18
Reviewed-by: Qt CMake Build Bot
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
This commit is contained in:
Tor Arne Vestbø 2019-09-23 13:35:06 +02:00 committed by Alexandru Croitor
parent 8049ef3d4d
commit 2cc3720a57
1 changed files with 12 additions and 0 deletions
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12
cmake/QtBuild.cmake
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@ -231,6 +231,18 @@ set(QT_BUILD_INTERNALS_EXTRA_CMAKE_CODE "")
# This will be /path/to/qtbase/tests when building standalone tests.
set(QT_TOP_LEVEL_SOURCE_DIR "${CMAKE_CURRENT_SOURCE_DIR}")
# Prevent warnings about object files without any symbols. This is a common
# thing in Qt as we tend to build files unconditionally, and then use ifdefs
# to compile out parts that are not relevant.
if(CMAKE_HOST_APPLE AND APPLE)
foreach(lang ASM C CXX)
# We have to tell 'ar' to not run ranlib by itself, by passing the 'S' option
set(CMAKE_${lang}_ARCHIVE_CREATE "<CMAKE_AR> qcS <TARGET> <LINK_FLAGS> <OBJECTS>")
set(CMAKE_${lang}_ARCHIVE_APPEND "<CMAKE_AR> qS <TARGET> <LINK_FLAGS> <OBJECTS>")
set(CMAKE_${lang}_ARCHIVE_FINISH "<CMAKE_RANLIB> -no_warning_for_no_symbols <TARGET>")
endforeach()
endif()
# Functions and macros:
# qt_remove_args can remove arguments from an existing list of function