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allow override of CMAKE_CXX_STANDARD

This commit is contained in:
Felix Nieuwenhuizen 2020-12-03 20:45:46 +01:00
parent 66bf523beb
commit 98a3f7d640
1 changed files with 6 additions and 1 deletions
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7
runtime/Cpp/CMakeLists.txt
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@ -76,8 +76,13 @@ endif()
# Initialize CXXFLAGS.
if("${CMAKE_VERSION}" VERSION_GREATER 3.1.0)
set(CMAKE_CXX_STANDARD 11)
if(NOT DEFINED CMAKE_CXX_STANDARD)
# only set CMAKE_CXX_STANDARD if not already set
# this allows the standard to be set by the caller, for example with -DCMAKE_CXX_STANDARD:STRING=17
set(CMAKE_CXX_STANDARD 11)
endif()
set(CMAKE_CXX_STANDARD_REQUIRED ON)
set(CMAKE_CXX_EXTENSIONS OFF)
else()
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")
set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -std=c++11")