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[Build] enable IPO/LTO for release builds #11459

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[Build] enable IPO/LTO for release builds #11459

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22 changes: 22 additions & 0 deletions CMakeLists.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -17,6 +17,7 @@ option(SC_NO_NETWORKING "Disable all networking related stuff." OFF)
option(SC_USE_FLAT_INSTALL "Install files into a flat folder structure" ${WIN32})

option(SC_EVENT_QUEUE_DEBUG "Enable Event Queue Debug Info" OFF)
option(SC_ENABLE_LTO "Enable IPO/LTO for non-Debug builds" ON)

set(CMAKE_CXX_STANDARD 17 CACHE STRING "C++ standard to conform to")
set(CMAKE_CXX_STANDARD_REQUIRED YES)
Expand Down Expand Up @@ -53,6 +54,26 @@ function(sc_common_compiler_options target)
)
endfunction()

if(SC_ENABLE_LTO)
include(CheckIPOSupported)
check_ipo_supported(RESULT SC_IPO_SUPPORTED OUTPUT SC_IPO_OUTPUT LANGUAGES CXX)
if(SC_IPO_SUPPORTED)
message(STATUS "IPO/LTO enabled for non-Debug builds")
else()
message(STATUS "IPO/LTO requested but not supported by this toolchain: ${SC_IPO_OUTPUT}")
endif()
endif()

function(sc_enable_lto target)
if(SC_ENABLE_LTO AND SC_IPO_SUPPORTED)
set_target_properties(${target} PROPERTIES
INTERPROCEDURAL_OPTIMIZATION_RELEASE ON
INTERPROCEDURAL_OPTIMIZATION_RELWITHDEBINFO ON
INTERPROCEDURAL_OPTIMIZATION_MINSIZEREL ON
)
endif()
endfunction()


### Git Hash ###
# Get the current working branch
Expand Down Expand Up @@ -80,6 +101,7 @@ endif()
add_executable(simc engine/sc_main.cpp)
target_link_libraries(simc engine)
sc_common_compiler_options(simc)
sc_enable_lto(simc)

install(TARGETS simc DESTINATION ${SIMC_INSTALL_BIN})

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1 change: 1 addition & 0 deletions engine/CMakeLists.txt
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Expand Up @@ -9,6 +9,7 @@ include(../source_files/cmake_engine.txt)
add_library(engine ${source_files})
target_include_directories(engine PUBLIC . ./include ./lib)
sc_common_compiler_options(engine)
sc_enable_lto(engine)

# Make cmake selections visible to C++ code
if(SC_NO_THREADING)
Expand Down
3 changes: 2 additions & 1 deletion qt/CMakeLists.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -36,6 +36,7 @@ if (${QT_VERSION_MAJOR} EQUAL 6)
endif()

sc_common_compiler_options(SimulationCraft)
sc_enable_lto(SimulationCraft)

target_include_directories(SimulationCraft PUBLIC ../engine/)
target_link_libraries(SimulationCraft
Expand Down Expand Up @@ -74,4 +75,4 @@ DESTINATION ${SIMC_INSTALL_SHARED}/locale)
if(WIN32)
include(${PROJECT_SOURCE_DIR}/cmake/windeployqt.cmake)
windeployqt(SimulationCraft)
endif()
endif()
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