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Experimenting with LTO.

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This commit is contained in:
Sandu Liviu Catalin
2020-08-19 16:49:45 +03:00
parent 4e5aa5a292
commit 5eabcab3a5
13 changed files with 63 additions and 3 deletions
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15
CMakeLists.txt
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@@ -6,6 +6,7 @@ set(CMAKE_MODULE_PATH ${PROJECT_SOURCE_DIR}/cmake)
# Several plugin options
option(BUILTIN_RUNTIMES "Include the MinGW runtime into the binary itself." ON)
option(LTO_ENABLED "Enable link time optimizations (takes a long time to compile!)." ON)
option(FORCE_32BIT_BIN "Create a 32-bit executable binary if the compiler defaults to 64-bit." OFF)
option(ENABLE_MYSQL "Enable the MySQL library." OFF)
option(ENABLE_API21 "Build for 2.1 API." OFF)
@@ -35,6 +36,20 @@ if(GCC OR MINGW)
endif()
endif()
# Enable LTO
if (NOT LTO_ENABLED)
message("Link time optimizations are disabled")
elseif ("${CMAKE_CXX_COMPILER_ID}" MATCHES "GNU" OR "${CMAKE_CXX_COMPILER_ID}" MATCHES "MINGW")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -flto")
elseif("${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang")
if (CMAKE_CXX_COMPILER_FRONTEND_VARIANT STREQUAL "GNU")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -flto")
endif()
else()
set(LTO_ENABLED OFF)
message("Link time optimizations not supported")
endif ()
# Enable position independent code
if(UNIX)
set(CMAKE_POSITION_INDEPENDENT_CODE ON)