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Merge pull request #14071 from alalek:cmake_remove_unreferenced_functions

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This commit is contained in:
Alexander Alekhin 2019-03-15 17:50:18 +00:00
commit 2c3f02c83f
1 changed files with 18 additions and 6 deletions
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24
cmake/OpenCVCompilerOptions.cmake
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@ -179,12 +179,24 @@ if(CV_GCC OR CV_CLANG)
string(REPLACE "-ffunction-sections" "" ${flags} "${${flags}}")
string(REPLACE "-fdata-sections" "" ${flags} "${${flags}}")
endforeach()
elseif(NOT ((IOS OR ANDROID) AND NOT BUILD_SHARED_LIBS) AND NOT MSVC)
# Remove unreferenced functions: function level linking
add_extra_compiler_option(-ffunction-sections)
add_extra_compiler_option(-fdata-sections)
if(NOT APPLE AND NOT OPENCV_SKIP_GC_SECTIONS)
set(OPENCV_EXTRA_EXE_LINKER_FLAGS "${OPENCV_EXTRA_EXE_LINKER_FLAGS} -Wl,--gc-sections")
else()
if(MSVC)
# TODO: Clang/C2 is not supported
elseif(((IOS OR ANDROID) AND NOT BUILD_SHARED_LIBS) AND NOT OPENCV_FORCE_FUNCTIONS_SECTIONS)
# don't create separate sections for functions/data, reduce package size
else()
# Remove unreferenced functions: function level linking
add_extra_compiler_option(-ffunction-sections)
add_extra_compiler_option(-fdata-sections)
if(NOT OPENCV_SKIP_GC_SECTIONS)
if(APPLE)
set(OPENCV_EXTRA_EXE_LINKER_FLAGS "${OPENCV_EXTRA_EXE_LINKER_FLAGS} -Wl,-dead_strip")
set(OPENCV_EXTRA_SHARED_LINKER_FLAGS "${OPENCV_EXTRA_SHARED_LINKER_FLAGS} -Wl,-dead_strip")
else()
set(OPENCV_EXTRA_EXE_LINKER_FLAGS "${OPENCV_EXTRA_EXE_LINKER_FLAGS} -Wl,--gc-sections")
set(OPENCV_EXTRA_SHARED_LINKER_FLAGS "${OPENCV_EXTRA_SHARED_LINKER_FLAGS} -Wl,--gc-sections")
endif()
endif()
endif()
endif()