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Update CMakeLists.txt

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This commit is contained in:
Sandu Liviu Catalin 2021-02-01 01:27:35 +02:00
parent 187761b137
commit 29aaa7e9b8
1 changed files with 43 additions and 7 deletions
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50
CMakeLists.txt
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@ -1,4 +1,4 @@
cmake_minimum_required(VERSION 3.0.2)
cmake_minimum_required(VERSION 3.7)
project(SqMod)
# Tell CMake where to find our scripts
@ -17,17 +17,53 @@ include(CheckCXXCompilerFlag)
# C++ standard availability check
if(CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
check_cxx_compiler_flag(-std=c++20 HAVE_FLAG_STD_CXX20)
if(HAVE_FLAG_STD_CXX20)
check_cxx_compiler_flag(-std=c++2a HAVE_FLAG_STD_CXX2A)
if(HAVE_FLAG_STD_CXX20 OR HAVE_FLAG_STD_CXX2A)
# We can use C++20
set(CPP_STD_NUMBER 20)
# Specific flags
if (HAVE_FLAG_STD_CXX2A AND NOT HAVE_FLAG_STD_CXX20)
set(CPP_STD_COMPILER_FLAG "-std=c++20")
else()
set(CPP_STD_COMPILER_FLAG "-std=c++2a")
endif()
# Need these workarounds for older CMake
if(${CMAKE_VERSION} VERSION_LESS "3.8.0")
if (NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 10.0)
set(CMAKE_CXX20_STANDARD_COMPILE_OPTION "-std=c++20")
set(CMAKE_CXX20_EXTENSION_COMPILE_OPTION "-std=gnu++20")
elseif (NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 8.0)
set(CMAKE_CXX20_STANDARD_COMPILE_OPTION "-std=c++2a")
set(CMAKE_CXX20_EXTENSION_COMPILE_OPTION "-std=gnu++2a")
endif()
endif()
else()
check_cxx_compiler_flag(-std=c++17 HAVE_FLAG_STD_CXX17)
if(HAVE_FLAG_STD_CXX17)
check_cxx_compiler_flag(-std=c++1z HAVE_FLAG_STD_CXX1Z)
if(HAVE_FLAG_STD_CXX17 OR HAVE_FLAG_STD_CXX1Z)
# We can use C++17
set(CPP_STD_NUMBER 17)
# Specific flags
if (HAVE_FLAG_STD_CXX17 AND NOT HAVE_FLAG_STD_CXX1Z)
set(CPP_STD_COMPILER_FLAG "-std=c++17")
else()
set(CPP_STD_COMPILER_FLAG "-std=c++1z")
endif()
# Need these workarounds for older CMake
if(${CMAKE_VERSION} VERSION_LESS "3.8.0")
if (NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 8.0)
set(CMAKE_CXX17_STANDARD_COMPILE_OPTION "-std=c++17")
set(CMAKE_CXX17_EXTENSION_COMPILE_OPTION "-std=gnu++17")
elseif (NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 5.1)
set(CMAKE_CXX17_STANDARD_COMPILE_OPTION "-std=c++1z")
set(CMAKE_CXX17_EXTENSION_COMPILE_OPTION "-std=gnu++1z")
endif()
endif()
else()
# C++14 is mandatory
set(CPP_STD_NUMBER 14)
# Specific flags
set(CPP_STD_COMPILER_FLAG "-std=c++14")
endif()
endif()
else()
@ -39,13 +75,13 @@ message(STATUS "SqMod: Using C++${CPP_STD_NUMBER} standard.")
# Default to the identified standard
if(CMAKE_VERSION VERSION_LESS "3.1")
if(CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++${CPP_STD_NUMBER}")
if(${CMAKE_CXX_COMPILER_ID} MATCHES "(GNU)+")
set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${CPP_STD_COMPILER_FLAG}")
endif()
else()
# Apparently the above does not work with cmake from on debian 8
if(CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++${CPP_STD_NUMBER}")
if(${CMAKE_CXX_COMPILER_ID} MATCHES "(GNU)+")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${CPP_STD_COMPILER_FLAG}")
endif()
# Try the standard method as well
set(CMAKE_CXX_STANDARD ${CPP_STD_NUMBER})