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cmake: Enable C++11 standards support

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This patch checks for, and enables C++11 support for building UPM.
This should work for all cmake versions currently supported by UPM
(2.8.11+), and any compiler (clang/gcc) that was released in this
decade.

Support can be specifically disabled by passing '-DENABLECXX11=OFF' to
cmake, though modules requiring this support will not build.

C++11 support is enabled by default.

Signed-off-by: Jon Trulson <jtrulson@ics.com>
Signed-off-by: Mihai Tudor Panu <mihai.tudor.panu@intel.com>
This commit is contained in:
Jon Trulson 2016-03-03 13:16:08 -07:00 committed by Mihai Tudor Panu
parent 49611e5ac0
commit 7a133cf891
1 changed files with 22 additions and 0 deletions
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22
CMakeLists.txt
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@ -58,6 +58,7 @@ option (BUILDSWIGJAVA "Build swig java modules" OFF)
option (IPK "Generate IPK using CPack" OFF)
option (RPM "Generate RPM using CPack" OFF)
option (BUILDTESTS "Generate check-ups for upm" ON)
option (ENABLECXX11 "Enable C++11 standards support" ON)
# Find swig
if (BUILDSWIG)
@ -76,6 +77,27 @@ include (TargetArch)
target_architecture (DETECTED_ARCH)
message( INFO " - Target arch is ${DETECTED_ARCH}")
# enable c++11 standards support
if (ENABLECXX11)
include(CheckCXXCompilerFlag)
if (CMAKE_VERSION VERSION_LESS "3.1")
CHECK_CXX_COMPILER_FLAG("-std=c++11" COMPILER_SUPPORTS_CXX11)
CHECK_CXX_COMPILER_FLAG("-std=c++0x" COMPILER_SUPPORTS_CXX0X)
if (COMPILER_SUPPORTS_CXX11)
set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")
elseif (COMPILER_SUPPORTS_CXX0X)
set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++0x")
else()
message(WARNING "The compiler ${CMAKE_CXX_COMPILER} has no C++11 support. Please update your C++ compiler.")
endif()
else()
# 3.1+ uses this generic method to enable c++11
set (CMAKE_CXX_STANDARD 11)
endif()
else()
message(WARNING "Some modules require C++11 support, and may not build without it.")
endif()
if (BUILDDOC)
# Add a target to generate API documentation with Doxygen
find_package (Doxygen)