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CMake

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- Fixed the C++11 config to actually check for availability of C++11 before trying to use it.
- Custom CXX flags no longer ignored on some platforms.
This commit is contained in:
Wilhelm Schuermann 2015-02-17 16:37:31 +01:00 • committed by Paul Beckingham
parent cc1c063925
commit 0d096a5a42
1 changed files with 25 additions and 3 deletions
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28
CMakeLists.txt
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@ -15,12 +15,35 @@ set (PROJECT_VERSION "2.4.2")
OPTION(USE_GNUTLS "Build gnutls support." ON)
message ("CMAKE_SYSTEM_NAME ${CMAKE_SYSTEM_NAME}")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")
include (CheckCXXCompilerFlag)
# NOTE: If we are to actually use C++11 features, we should either require
# a compiler that supports the -std=c++11 flag or check for the
# features used.
# Relying on -std=c++0x or even -std=gnu++0x is highly volatile.
CHECK_CXX_COMPILER_FLAG("-std=c++11" _HAS_CXX11)
CHECK_CXX_COMPILER_FLAG("-std=c++0x" _HAS_CXX0X)
CHECK_CXX_COMPILER_FLAG("-std=gnu++0x" _HAS_GNU0X)
if (_HAS_CXX11)
set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")
elseif (_HAS_CXX0X)
message (WARNING "Enabling -std=c++0x draft compile flag. Please try using an up to date compiler if you run into any problems!")
set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++0x")
elseif (_HAS_GNU0X)
message (WARNING "Enabling -std=gnu++0x draft compile flag. You're probably in for a bad time, please try using an up to date compiler!")
set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=gnu++0x")
else (_HAS_CXX11)
message (FATAL_ERROR "C++11 support missing. Try upgrading your C++ compiler! If you have a good reason for using an outdated compiler, please let us know at support@taskwarrior.org!")
endif (_HAS_CXX11)
if (${CMAKE_SYSTEM_NAME} MATCHES "Linux")
set (LINUX true)
elseif (${CMAKE_SYSTEM_NAME} MATCHES "Darwin")
set (DARWIN true)
set (CMAKE_CXX_FLAGS "-std=c++11 -stdlib=libc++")
set (CMAKE_CXX_FLAGS "-stdlib=libc++")
elseif (${CMAKE_SYSTEM_NAME} MATCHES "kFreeBSD")
set (KFREEBSD true)
elseif (${CMAKE_SYSTEM_NAME} MATCHES "FreeBSD")
@ -35,7 +58,6 @@ elseif (${CMAKE_SYSTEM_NAME} STREQUAL "GNU")
set (GNUHURD true)
elseif (${CMAKE_SYSTEM_NAME} STREQUAL "CYGWIN")
set (CYGWIN true)
set (CMAKE_CXX_FLAGS "-std=gnu++0x")
else (${CMAKE_SYSTEM_NAME} MATCHES "Linux")
set (UNKNOWN true)
endif (${CMAKE_SYSTEM_NAME} MATCHES "Linux")