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message ("-- Configuring C++17")
message ("-- System: ${CMAKE_SYSTEM_NAME}")
include (CheckCXXCompilerFlag)
CHECK_CXX_COMPILER_FLAG("-std=c++17" _HAS_CXX17)
if (_HAS_CXX17)
set (_CXX14_FLAGS "-std=c++17")
else (_HAS_CXX17)
message (FATAL_ERROR "C++17 support missing. Try upgrading your C++ compiler. If you have a good reason for using an outdated compiler, please let us know at support@gothenburgbitfactory.org.")
endif (_HAS_CXX17)
if (${CMAKE_SYSTEM_NAME} MATCHES "Linux")
set (LINUX true)
elseif (${CMAKE_SYSTEM_NAME} MATCHES "Darwin")
set (DARWIN true)
set (_CXX14_FLAGS "${_CXX14_FLAGS} -stdlib=libc++")
elseif (${CMAKE_SYSTEM_NAME} MATCHES "kFreeBSD")
set (KFREEBSD true)
elseif (${CMAKE_SYSTEM_NAME} MATCHES "FreeBSD")
set (FREEBSD true)
elseif (${CMAKE_SYSTEM_NAME} MATCHES "OpenBSD")
set (OPENBSD true)
elseif (${CMAKE_SYSTEM_NAME} MATCHES "NetBSD")
set (NETBSD true)
elseif (${CMAKE_SYSTEM_NAME} MATCHES "DragonFly")
set (DRAGONFLY true)
elseif (${CMAKE_SYSTEM_NAME} MATCHES "SunOS")
set (SOLARIS true)
elseif (${CMAKE_SYSTEM_NAME} STREQUAL "GNU")
set (GNUHURD true)
elseif (${CMAKE_SYSTEM_NAME} STREQUAL "CYGWIN")
set (CYGWIN true)
set (_CXX14_FLAGS "-std=gnu++17")
else (${CMAKE_SYSTEM_NAME} MATCHES "Linux")
set (UNKNOWN true)
endif (${CMAKE_SYSTEM_NAME} MATCHES "Linux")
set (CMAKE_CXX_FLAGS "${_CXX14_FLAGS} ${CMAKE_CXX_FLAGS}")
set (CMAKE_CXX_FLAGS "-Wall -Wextra -Wsign-compare -Wreturn-type ${CMAKE_CXX_FLAGS}")
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