a0e0535512
On Linux all libraries that are specified on the command-line will be referred to in the resulting binary. There may be find modules which just adds everything to satisfy every possible dependency; we want to discard those unnecessary libraries.
19 lines
648 B
CMake
19 lines
648 B
CMake
# - Use only needed imports from libraries
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#
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# Add the -Wl,--as-needed flag to the default linker flags on Linux
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# in order to get only the minimal set of dependencies.
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function (prepend var_name value)
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if (${var_name})
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set (${var_name} "${value} ${${var_name}}" PARENT_SCOPE)
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else (${var_name})
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set (${var_name} "${value}")
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endif (${var_name})
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endfunction (prepend var_name value)
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if (CMAKE_CXX_PLATFORM_ID STREQUAL "Linux")
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prepend (CMAKE_EXE_LINKER_FLAGS "-Wl,--as-needed")
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prepend (CMAKE_MODULE_LINKER_FLAGS "-Wl,--as-needed")
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prepend (CMAKE_SHARED_LINKER_FLAGS "-Wl,--as-needed")
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endif (CMAKE_CXX_PLATFORM_ID STREQUAL "Linux")
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