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CMakeLists.txt: Don't redefine CMAKE_INTERPROCEDURAL_OPTIMIZATION_RELEASE if it has already been defined 

Signed-off-by: Username404 <w.iron.zombie@gmail.com>
This commit is contained in:
Username404 2022-08-27 21:59:32 +02:00
parent d2a83a2f5e
commit 62652ad9a4
Signed by: Username404-59
GPG Key ID: 7AB361FBB257A5D1
1 changed files with 8 additions and 3 deletions
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7
CMakeLists.txt
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@ -91,8 +91,13 @@ if (${IS_GNU} OR ${IS_CLANG})
endif()
endif()
if (NOT DEFINED CMAKE_INTERPROCEDURAL_OPTIMIZATION_RELEASE)
set(USER_DEFINED_INTERPROCEDURAL_OPTIMIZATION_RELEASE NO)
include(CheckIPOSupported)
check_ipo_supported(RESULT CMAKE_INTERPROCEDURAL_OPTIMIZATION_RELEASE LANGUAGES CXX)
else()
set(USER_DEFINED_INTERPROCEDURAL_OPTIMIZATION_RELEASE YES)
endif()
if (${IS_GNU})
if (CMAKE_CXX_COMPILER_VERSION VERSION_LESS ${MINIMAL_GNU} AND NOT ${IGNORE_MINIMAL_COMPILER_VERSION})
@ -109,7 +114,7 @@ elseif(${IS_CLANG})
if (CMAKE_CXX_COMPILER_VERSION VERSION_LESS ${MINIMAL_CLANG} AND NOT ${IGNORE_MINIMAL_COMPILER_VERSION})
message(FATAL_ERROR "Clang ${MINIMAL_CLANG} or higher is required.")
endif()
if (${CMAKE_INTERPROCEDURAL_OPTIMIZATION_RELEASE} OR MINGW) # CMAKE_INTERPROCEDURAL_OPTIMIZATION_RELEASE is false on llvm-mingw toolchains even though it is supported
if (${CMAKE_INTERPROCEDURAL_OPTIMIZATION_RELEASE} OR (MINGW AND NOT USER_DEFINED_INTERPROCEDURAL_OPTIMIZATION_RELEASE)) # CMAKE_INTERPROCEDURAL_OPTIMIZATION_RELEASE is false on llvm-mingw toolchains even though it is supported
set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -flto=thin")
if (NOT DEFINED EMSCRIPTEN)
set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -fwhole-program-vtables")