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-rw-r--r--Modules/CMakeDetermineCXXCompiler.cmake1
1 files changed, 1 insertions, 0 deletions
diff --git a/Modules/CMakeDetermineCXXCompiler.cmake b/Modules/CMakeDetermineCXXCompiler.cmake
index 8c33eb6345..454184429e 100644
--- a/Modules/CMakeDetermineCXXCompiler.cmake
+++ b/Modules/CMakeDetermineCXXCompiler.cmake
@@ -105,6 +105,7 @@ if(NOT CMAKE_CXX_COMPILER_ID_RUN)
include(${CMAKE_ROOT}/Modules/CMakeDetermineCompilerId.cmake)
CMAKE_DETERMINE_COMPILER_ID(CXX CXXFLAGS CMakeCXXCompilerId.cpp)
+ CMAKE_DIAGNOSE_UNSUPPORTED_CLANG(CXX CXX)
# Set old compiler and platform id variables.
if(CMAKE_CXX_COMPILER_ID STREQUAL "GNU")