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[cmake] Enable Linktime optimizations when available, bump cmake requirement to 3.9.6

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This commit is contained in:
Nils Wentzell 2021-01-22 14:53:04 -05:00
parent 6bd1e51c4e
commit f247db58d8
1 changed files with 14 additions and 2 deletions
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16
CMakeLists.txt
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@ -19,8 +19,8 @@
#
# ##############################################################################
cmake_minimum_required(VERSION 3.3.2 FATAL_ERROR)
cmake_policy(VERSION 3.3.2)
cmake_minimum_required(VERSION 3.9.6 FATAL_ERROR)
cmake_policy(VERSION 3.9.6)
if(POLICY CMP0074)
cmake_policy(SET CMP0074 NEW)
endif()
@ -94,6 +94,18 @@ set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
# Global compiler options
option(BUILD_SHARED_LIBS "Enable compilation of shared libraries" OFF)
add_compile_options($<$<CONFIG:Debug>:-ggdb3>)
cmake_policy(SET CMP0069 NEW)
include(CheckIPOSupported)
check_ipo_supported(RESULT ipo_supported)
if(NOT ipo_supported)
message(STATUS "Linktime optimizations could not be enabled!")
else()
message(STATUS "Linktime optimizations enabled!")
set(CMAKE_INTERPROCEDURAL_OPTIMIZATION TRUE)
if(CMAKE_SYSTEM_NAME EQUAL "Linux")
add_link_options($<$<CXX_COMPILER_ID:Clang>:-fuse-ld=gold>)
endif()
endif()
# Create an Interface target for compiler warnings
add_library(${PROJECT_NAME}_warnings INTERFACE)