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Use cmake method to enable interprocedural optimizations

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Eli2 2020-01-31 23:58:21 +01:00 committed by AnyOldName3
parent dc34380f62
commit 257a6b4629
2 changed files with 28 additions and 9 deletions
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32
CMakeLists.txt
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@ -1,6 +1,11 @@
project(OpenMW)
cmake_minimum_required(VERSION 3.1.0)
# for link time optimization, remove if cmake version is >= 3.9
if(POLICY CMP0069)
cmake_policy(SET CMP0069 NEW)
endif()
# Apps and tools
option(BUILD_OPENMW "Build OpenMW" ON)
option(BUILD_LAUNCHER "Build Launcher" ON)
@ -97,6 +102,7 @@ option(OSG_STATIC "Link static build of OpenSceneGraph into the binaries" FALSE)
option(QT_STATIC "Link static build of QT into the binaries" FALSE)
option(OPENMW_UNITY_BUILD "Use fewer compilation units to speed up compile time" FALSE)
option(OPENMW_LTO_BUILD "Build OpenMW with Link-Time Optimization (Needs ~2GB of RAM)" OFF)
# what is necessary to build documentation
IF( BUILD_DOCS )
@ -110,7 +116,6 @@ option(OPENMW_OSX_DEPLOYMENT OFF)
if (MSVC)
option(OPENMW_MP_BUILD "Build OpenMW with /MP flag" OFF)
option(OPENMW_LTO_BUILD "Build OpenMW with Link-Time Optimization (Needs ~2GB of RAM)" OFF)
endif()
# Set up common paths
@ -388,6 +393,23 @@ endif()
# CXX Compiler settings
set(CMAKE_CXX_STANDARD 14)
if(OPENMW_LTO_BUILD)
if(NOT CMAKE_VERSION VERSION_LESS 3.9)
include(CheckIPOSupported)
check_ipo_supported(RESULT HAVE_IPO OUTPUT HAVE_IPO_OUTPUT)
if(HAVE_IPO)
message(STATUS "LTO enabled")
set(CMAKE_INTERPROCEDURAL_OPTIMIZATION TRUE)
else()
message(WARNING "Requested option OPENMW_LTO_BUILD not supported by this compiler: ${HAVE_IPO_OUTPUT}")
endif()
else()
message(WARNING "Requested option OPENMW_LTO_BUILD not supported by this cmake version: ${CMAKE_VERSION}")
endif()
endif()
if (CMAKE_CXX_COMPILER_ID STREQUAL GNU OR CMAKE_CXX_COMPILER_ID STREQUAL Clang)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Wextra -Wundef -Wno-unused-parameter -std=c++14 -pedantic -Wno-long-long")
add_definitions( -DBOOST_NO_CXX11_SCOPED_ENUMS=ON )
@ -407,14 +429,6 @@ if (CMAKE_CXX_COMPILER_ID STREQUAL GNU OR CMAKE_CXX_COMPILER_ID STREQUAL Clang)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-unused-but-set-parameter")
endif()
elseif (MSVC)
# Enable link-time code generation globally for all linking
if (OPENMW_LTO_BUILD)
set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} /GL")
set(CMAKE_EXE_LINKER_FLAGS_RELEASE "${CMAKE_EXE_LINKER_FLAGS_RELEASE} /LTCG")
set(CMAKE_SHARED_LINKER_FLAGS_RELEASE "${CMAKE_SHARED_LINKER_FLAGS_RELEASE} /LTCG")
set(CMAKE_STATIC_LINKER_FLAGS_RELEASE "${CMAKE_STATIC_LINKER_FLAGS_RELEASE} /LTCG")
endif()
set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} /FORCE:MULTIPLE")
endif (CMAKE_CXX_COMPILER_ID STREQUAL GNU OR CMAKE_CXX_COMPILER_ID STREQUAL Clang)

5
extern/recastnavigation/CMakeLists.txt vendored
View file

@ -1,5 +1,10 @@
cmake_minimum_required(VERSION 3.0)
# for link time optimization, remove if cmake version is >= 3.9
if(POLICY CMP0069)
cmake_policy(SET CMP0069 NEW)
endif()
project(RecastNavigation)
# lib versions