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# want C11 and C++11 support.
if(CMAKE_C_COMPILER_ID STREQUAL "GNU" AND CMAKE_C_COMPILER_VERSION VERSION_LESS 4.7)
message(FATAL_ERROR "GNU C compiler version ${CMAKE_C_COMPILER_VERSION} is too old. Need 4.7+")
endif()
if(CMAKE_CXX_COMPILER_ID STREQUAL "GNU" AND CMAKE_CXX_COMPILER_VERSION VERSION_LESS 4.7)
message(FATAL_ERROR "GNU C++ compiler version ${CMAKE_CXX_COMPILER_VERSION} is too old. Need 4.7+")
endif()
if(CMAKE_C_COMPILER_ID STREQUAL "Clang" AND CMAKE_C_COMPILER_VERSION VERSION_LESS 3.3)
message(FATAL_ERROR "LLVM Clang C compiler version ${CMAKE_C_COMPILER_VERSION} is too old. Need 3.3+")
endif()
if(CMAKE_CXX_COMPILER_ID STREQUAL "Clang" AND CMAKE_CXX_COMPILER_VERSION VERSION_LESS 3.3)
message(FATAL_ERROR "LLVM Clang C++ compiler version ${CMAKE_CXX_COMPILER_VERSION} is too old. Need 3.3+")
endif()
if(CMAKE_C_COMPILER_ID STREQUAL "GNU" AND CMAKE_C_COMPILER_VERSION VERSION_LESS 5.0)
message(WARNING "Support for GNU C compiler version ${CMAKE_C_COMPILER_VERSION} is soft-deprecated. Consider upgrading to 5.0+")
endif()
if(CMAKE_CXX_COMPILER_ID STREQUAL "GNU" AND CMAKE_CXX_COMPILER_VERSION VERSION_LESS 5.0)
message(WARNING "Support for GNU C++ compiler version ${CMAKE_CXX_COMPILER_VERSION} is soft-deprecated. Consider upgrading to 5.0+")
endif()
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