diff options
Diffstat (limited to 'CMakeLists.txt')
| -rw-r--r-- | CMakeLists.txt | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/CMakeLists.txt b/CMakeLists.txt index 998db15..756e379 100644 --- a/CMakeLists.txt +++ b/CMakeLists.txt @@ -1,7 +1,7 @@ # Distributed under the OSI-approved BSD 3-Clause License. See accompanying # file Copyright.txt or https://cmake.org/licensing for details. -cmake_minimum_required(VERSION 3.1 FATAL_ERROR) +cmake_minimum_required(VERSION 3.1...3.12 FATAL_ERROR) set(CMAKE_USER_MAKE_RULES_OVERRIDE_C ${CMAKE_CURRENT_SOURCE_DIR}/Source/Modules/OverrideC.cmake) set(CMAKE_USER_MAKE_RULES_OVERRIDE_CXX ${CMAKE_CURRENT_SOURCE_DIR}/Source/Modules/OverrideCXX.cmake) project(CMake) @@ -117,6 +117,18 @@ option(CMake_BUILD_DEVELOPER_REFERENCE "Build CMake Developer Reference" OFF) mark_as_advanced(CMake_BUILD_DEVELOPER_REFERENCE) +# option to build using interprocedural optimizations (IPO/LTO) +if (NOT CMAKE_VERSION VERSION_LESS 3.12.2) + option(CMake_BUILD_LTO "Compile CMake with link-time optimization if supported" OFF) + if(CMake_BUILD_LTO) + include(CheckIPOSupported) + check_ipo_supported(RESULT HAVE_IPO) + if(HAVE_IPO) + set(CMAKE_INTERPROCEDURAL_OPTIMIZATION TRUE) + endif() + endif() +endif() + #----------------------------------------------------------------------- # a macro to deal with system libraries, implemented as a macro # simply to improve readability of the main script |