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-rw-r--r--Modules/Compiler/Clang-C.cmake9
1 files changed, 5 insertions, 4 deletions
diff --git a/Modules/Compiler/Clang-C.cmake b/Modules/Compiler/Clang-C.cmake
index 548d0a5..ef3a46a 100644
--- a/Modules/Compiler/Clang-C.cmake
+++ b/Modules/Compiler/Clang-C.cmake
@@ -17,10 +17,11 @@ if(NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 3.4)
set(CMAKE_C11_EXTENSION_COMPILE_OPTION "-std=gnu11")
endif()
-if(NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 3.6)
- set(CMAKE_C_STANDARD_DEFAULT 11)
-elseif(NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 3.4)
- set(CMAKE_C_STANDARD_DEFAULT 99)
+if(NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 3.4)
+ if (NOT CMAKE_C_STANDARD_COMPUTED_DEFAULT)
+ message(FATAL_ERROR "CMAKE_C_STANDARD_COMPUTED_DEFAULT should be set for ${CMAKE_C_COMPILER_ID} (${CMAKE_C_COMPILER}) version ${CMAKE_C_COMPILER_VERSION}")
+ endif()
+ set(CMAKE_C_STANDARD_DEFAULT ${CMAKE_C_STANDARD_COMPUTED_DEFAULT})
endif()
macro(cmake_record_c_compile_features)