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Merge pull request #13292 from Kingcom/cmake

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Fix undesired re-builds after runnning CMake
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Henrik Rydgård authored and GitHub committed 2020-08-16 14:50:28 +02:00
2 parents 61bf512244 fce0fdb6dc
commit 3c8ca6ad8d
1 file changed
+12
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CMakeLists.txt
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@@ -240,6 +240,18 @@ endif()
if(ARM64)
message("Generating for ARMv8, ${CMAKE_BUILD_TYPE}")
endif()
# It looks like the flags for the selected build type are written to the cache after each run, which causes some of the operations
# below to keep expanding them with the same flags over and over on every run, leading to a rebuild of the majority of the files.
# To work around this, remember the initial state of the variables from the first run and reset the variables to that.
# TODO: Setting the attributes per target would probably be a better solution.
foreach (LANGUAGE C CXX)
foreach (BUILD_TYPE DEBUG MINSIZEREL RELEASE RELWITHDEBINFO)
set(_CMAKE_${LANGUAGE}_FLAGS_${BUILD_TYPE}_INITIAL ${CMAKE_${LANGUAGE}_FLAGS_${BUILD_TYPE}} CACHE STRING "")
set(CMAKE_${LANGUAGE}_FLAGS_${BUILD_TYPE} ${_CMAKE_${LANGUAGE}_FLAGS_${BUILD_TYPE}_INITIAL})
endforeach()
endforeach()
if(NOT MSVC)
if(ANDROID)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=gnu++11")