Abdelrahman Said
24 lines
723 B
CMake
24 lines
723 B
CMake
include(helpers)
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tristate(IGRAPH_ENABLE_LTO "Enable link-time optimization" OFF)
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include(CheckIPOSupported)
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if(IGRAPH_ENABLE_LTO)
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# this matches both ON and AUTO
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check_ipo_supported(RESULT IPO_SUPPORTED OUTPUT IPO_NOT_SUPPORTED_REASON)
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if(IGRAPH_ENABLE_LTO STREQUAL "AUTO")
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# autodetection
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set(IGRAPH_ENABLE_LTO ${IPO_SUPPORTED})
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if(IPO_SUPPORTED)
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set(CMAKE_INTERPROCEDURAL_OPTIMIZATION TRUE)
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endif()
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elseif(IPO_SUPPORTED)
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# user wanted LTO and the compiler supports it
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set(CMAKE_INTERPROCEDURAL_OPTIMIZATION TRUE)
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else()
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# user wanted LTO and the compiler does not support it
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message(FATAL_ERROR "Link-time optimization not supported on this compiler")
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endif()
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endif()
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