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Explicitly require CMake 3.3 and a C++11 Compiler

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We need to bump our minimum CMake version to get support for C++11
flags on certain compilers.
This commit is contained in:
Robert Maynard 2016-09-09 12:04:53 -04:00
parent fa3c2b8986
commit 314d91a5f3
1 changed files with 11 additions and 29 deletions
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40
CMakeLists.txt
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@ -18,25 +18,12 @@
## this software.
##============================================================================
cmake_minimum_required(VERSION 2.8.12)
#setup policy rules for CMake 3.0 while we have a minimum required of 2.8.X
if(POLICY CMP0025)
cmake_policy(SET CMP0025 NEW)#Clang and AppleClang are different compiler ids
cmake_policy(SET CMP0042 NEW)#Enable RPATH on OSX
endif()
#setup policy rules for CMake 3.1 while we have a minimum required of 2.8.X
if(POLICY CMP0054)
cmake_policy(SET CMP0053 NEW)#Enable faster parser engine
cmake_policy(SET CMP0054 NEW)#simplify if() argument expansion
endif()
#setup policy rules for CMake 3.3 while we have a minimum required of 2.8.X
if(POLICY CMP0063)
cmake_policy(SET CMP0058 NEW)#All dependencies on built targets are declared
cmake_policy(SET CMP0063 NEW)#Honor visibility properties for all targets
endif()
#We require CMake 3.3 for Modern CMake which as features such as:
# - Better custom command support
# - Better acting if() argument expansion
# - Support for usage requirements
# -
cmake_minimum_required(VERSION 3.3)
project (VTKm)
@ -75,16 +62,11 @@ endif()
#-----------------------------------------------------------------------------
# Add flag to enable C++11 support.
if (NOT CMAKE_VERSION VERSION_LESS "3.1")
option(VTKm_ENABLE_CXX11 "Build VTKm using C++11" ON)
else()
set(VTKm_ENABLE_CXX11 OFF)
endif()
# If the user has requested C++11, propagate that information to CMake
if (VTKm_ENABLE_CXX11)
set(CMAKE_CXX_STANDARD 11)
set(CMAKE_CXX_STANDARD_REQUIRED True)
set(CMAKE_CXX_EXTENSIONS False)
# Unless the user has explicitly stated to compile with a different standard
if (NOT DEFINED CMAKE_CXX_STANDARD)
set(CMAKE_CXX_STANDARD 11)
set(CMAKE_CXX_STANDARD_REQUIRED True)
set(CMAKE_CXX_EXTENSIONS False)
endif()
#-----------------------------------------------------------------------------