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| author | Tomi Valkeinen <tomi.valkeinen@ti.com> | 2016-09-28 10:42:03 +0300 |
|---|---|---|
| committer | Tomi Valkeinen <tomi.valkeinen@ti.com> | 2016-09-29 11:21:16 +0300 |
| commit | 8170f7a37747c3a414b8ad45bb587adcdac6e0da (patch) | |
| tree | 5e75a6728184d79e4146f875a2e747f252e2708e | |
| parent | 07c6c86874fef1e4aeccd37dc62cc009ba7212b8 (diff) | |
Improve LTO detection code
Split LTO detection into separate func and file, and create a cached
LTO_WORKS variable.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
| -rw-r--r-- | CMakeLists.txt | 37 | ||||
| -rw-r--r-- | LTO.cmake | 32 |
2 files changed, 41 insertions, 28 deletions
diff --git a/CMakeLists.txt b/CMakeLists.txt index 9214bfd..6306852 100644 --- a/CMakeLists.txt +++ b/CMakeLists.txt @@ -1,6 +1,8 @@ cmake_minimum_required(VERSION 2.8) project(kms++) +include(LTO.cmake) + set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib) set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib) set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/bin) @@ -35,34 +37,13 @@ set(CMAKE_POSITION_INDEPENDENT_CODE TRUE) # static link libc # set(CMAKE_EXE_LINKER_FLAGS "-static-libgcc -static-libstdc++") -if (NOT ${U_CMAKE_BUILD_TYPE} MATCHES DEBUG AND NOT DEFINED HAS_LTO_FLAG) - CHECK_CXX_COMPILER_FLAG("-flto" HAS_LTO_FLAG) - - if (HAS_LTO_FLAG) - find_program(LTO_AR NAMES "${CMAKE_C_COMPILER}-ar" gcc-ar) - find_program(LTO_RANLIB NAMES "${CMAKE_C_COMPILER}-ranlib" gcc-ranlib) - - if (LTO_AR) - EXECUTE_PROCESS(COMMAND "${LTO_AR}" --version RESULT_VARIABLE ret OUTPUT_QUIET ERROR_QUIET) - if (ret) - unset(LTO_AR CACHE) - endif() - endif() - - if (LTO_RANLIB) - EXECUTE_PROCESS(COMMAND "${LTO_RANLIB}" --version RESULT_VARIABLE ret OUTPUT_QUIET ERROR_QUIET) - if (ret) - unset(LTO_RANLIB CACHE) - endif() - endif() - - if (LTO_AR AND LTO_RANLIB) - set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -flto") - set(CMAKE_AR "${LTO_AR}") - set(CMAKE_RANLIB "${LTO_RANLIB}") - else() - message(STATUS "gcc-ar or gcc-ranlib not found, disabling LTO") - endif() +check_lto() + +if (NOT ${U_CMAKE_BUILD_TYPE} MATCHES DEBUG) + if (LTO_WORKS) + set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -flto") + set(CMAKE_AR "${LTO_AR}") + set(CMAKE_RANLIB "${LTO_RANLIB}") endif() endif() diff --git a/LTO.cmake b/LTO.cmake new file mode 100644 index 0000000..9a18d77 --- /dev/null +++ b/LTO.cmake @@ -0,0 +1,32 @@ +function(check_lto) + if (DEFINED LTO_WORKS) + return() + endif() + + set(LTO_WORKS FALSE CACHE INTERNAL "LTO works") + + CHECK_CXX_COMPILER_FLAG("-flto" HAS_LTO_FLAG) + + if (NOT HAS_LTO_FLAG) + return() + endif() + + find_program(LTO_AR NAMES "${CMAKE_C_COMPILER}-ar" gcc-ar) + find_program(LTO_RANLIB NAMES "${CMAKE_C_COMPILER}-ranlib" gcc-ranlib) + + if (NOT LTO_AR OR NOT LTO_RANLIB) + return() + endif() + + EXECUTE_PROCESS(COMMAND "${LTO_AR}" --version RESULT_VARIABLE ret OUTPUT_QUIET ERROR_QUIET) + if (ret) + return() + endif() + + EXECUTE_PROCESS(COMMAND "${LTO_RANLIB}" --version RESULT_VARIABLE ret OUTPUT_QUIET ERROR_QUIET) + if (ret) + return() + endif() + + set(LTO_WORKS TRUE CACHE INTERNAL "LTO works") +endfunction() |