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cmake: test flags instead of assuming GCC/clang style 

This should allow PGI, and maybe even MSVC, to work.
This commit is contained in:
Evan Nemerson 2018-06-23 11:59:16 -07:00
parent 92a1abf392
commit 9fa64516e1
1 changed files with 31 additions and 3 deletions
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34
CMakeLists.txt
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@ -2,6 +2,7 @@ cmake_minimum_required(VERSION 3.7)
project(leopard)
include(CMakeDependentOption)
include(CheckCXXCompilerFlag)
set(CMAKE_CONFIGURATION_TYPES "Debug;Release" CACHE STRING "" FORCE)
@ -27,9 +28,36 @@ if(NOT CMAKE_BUILD_TYPE)
set(CMAKE_BUILD_TYPE Release)
endif()
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Wextra")
set(CMAKE_CXX_FLAGS_DEBUG "-g -O0")
set(CMAKE_CXX_FLAGS_RELEASE "-O3")
check_cxx_compiler_flag("-G" CXX_FLAG_g)
check_cxx_compiler_flag("-O0" CXX_FLAG_O0)
check_cxx_compiler_flag("-O3" CXX_FLAG_O3)
check_cxx_compiler_flag("-Wall" CXX_FLAG_Wall)
check_cxx_compiler_flag("-Wextra" CXX_FLAG_Wextra)
if(CXX_FLAG_g)
set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -g")
set(CMAKE_C_FLAGS_DEBUG "${CMAKE_C_FLAGS_DEBUG} -g")
endif(CXX_FLAG_g)
if(CXX_FLAG_O0)
set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -O0")
set(CMAKE_C_FLAGS_DEBUG "${CMAKE_C_FLAGS_DEBUG} -O0")
endif(CXX_FLAG_O0)
if(CXX_FLAG_O3)
set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_DEBUG} -O3")
set(CMAKE_C_FLAGS_RELEASE "${CMAKE_C_FLAGS_DEBUG} -O3")
endif(CXX_FLAG_O3)
if(CXX_FLAG_Wall)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -O0")
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -O0")
endif(CXX_FLAG_Wall)
if(CXX_FLAG_Wextra)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall")
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wextra")
endif(CXX_FLAG_Wextra)
find_package(OpenMP)
cmake_dependent_option(ENABLE_OPENMP "Enable OpenMP support" ON "OPENMP_FOUND" OFF)