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build: Enable LTO (Link Time Optimization) #8654
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@ -85,6 +85,14 @@ endif()
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option(ENABLE_LIBINTL "enable libintl" ON)
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option(ENABLE_LIBICONV "enable libiconv" ON)
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if (MINGW)
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# Disable LTO by default as it may not compile
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# See https://github.com/Alexpux/MINGW-packages/issues/3516
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# and https://github.com/neovim/neovim/pull/8654#issuecomment-402316672
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option(ENABLE_LTO "enable link time optimization" OFF)
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else()
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option(ENABLE_LTO "enable link time optimization" ON)
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endif()
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# Set default build type.
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if(NOT CMAKE_BUILD_TYPE)
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@ -399,6 +399,10 @@ if(JEMALLOC_FOUND)
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list(APPEND NVIM_EXEC_LINK_LIBRARIES ${JEMALLOC_LIBRARIES})
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endif()
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if(POLICY CMP0069)
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cmake_policy(SET CMP0069 NEW)
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endif()
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add_executable(nvim ${NVIM_GENERATED_FOR_SOURCES} ${NVIM_GENERATED_FOR_HEADERS}
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${NVIM_GENERATED_SOURCES} ${NVIM_SOURCES} ${NVIM_HEADERS})
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target_link_libraries(nvim ${NVIM_EXEC_LINK_LIBRARIES})
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@ -407,6 +411,14 @@ install_helper(TARGETS nvim)
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set_property(TARGET nvim APPEND PROPERTY
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INCLUDE_DIRECTORIES ${LUA_PREFERRED_INCLUDE_DIRS})
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if(ENABLE_LTO AND (POLICY CMP0069))
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include(CheckIPOSupported)
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check_ipo_supported(RESULT IPO_SUPPORTED)
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if(IPO_SUPPORTED AND (NOT CMAKE_BUILD_TYPE MATCHES Debug))
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set_property(TARGET nvim PROPERTY INTERPROCEDURAL_OPTIMIZATION TRUE)
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endif()
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endif()
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if(WIN32)
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# Copy DLLs and third-party tools to bin/ and install them along with nvim
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add_custom_target(nvim_runtime_deps ALL
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