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Add ThinLTO support for clang

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This commit is contained in:
Maksim Shabunin 2018-01-11 13:50:35 +03:00
parent 8b87c4b96a
commit c0ae812aa2
2 changed files with 5 additions and 0 deletions
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1
CMakeLists.txt
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@ -314,6 +314,7 @@ OCV_OPTION(ENABLE_INSTRUMENTATION "Instrument functions to collect calls tra
OCV_OPTION(ENABLE_GNU_STL_DEBUG "Enable GNU STL Debug mode (defines _GLIBCXX_DEBUG)" OFF IF ((NOT CMAKE_VERSION VERSION_LESS "2.8.11") AND CMAKE_COMPILER_IS_GNUCXX) )
OCV_OPTION(ENABLE_BUILD_HARDENING "Enable hardening of the resulting binaries (against security attacks, detects memory corruption, etc)" OFF)
OCV_OPTION(ENABLE_LTO "Enable Link Time Optimization" OFF IF CMAKE_COMPILER_IS_GNUCXX OR MSVC)
OCV_OPTION(ENABLE_THIN_LTO "Enable Thin LTO" OFF IF CMAKE_COMPILER_IS_CLANGCXX)
OCV_OPTION(GENERATE_ABI_DESCRIPTOR "Generate XML file for abi_compliance_checker tool" OFF IF UNIX)
OCV_OPTION(CV_ENABLE_INTRINSICS "Use intrinsic-based optimized code" ON )
OCV_OPTION(CV_DISABLE_OPTIMIZATION "Disable explicit optimized code (dispatched code/intrinsics/loop unrolling/etc)" OFF )

4
cmake/OpenCVCompilerOptions.cmake
View File

@ -204,6 +204,10 @@ if(CMAKE_COMPILER_IS_GNUCXX)
add_extra_compiler_option(-flto)
endif()
if(ENABLE_THIN_LTO)
add_extra_compiler_option(-flto=thin)
endif()
set(OPENCV_EXTRA_FLAGS_RELEASE "${OPENCV_EXTRA_FLAGS_RELEASE} -DNDEBUG")
if(NOT " ${CMAKE_CXX_FLAGS} ${CMAKE_CXX_FLAGS_DEBUG} " MATCHES "-O")
set(OPENCV_EXTRA_FLAGS_DEBUG "${OPENCV_EXTRA_FLAGS_DEBUG} -O0")