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-rw-r--r--Modules/Compiler/GNU-C.cmake2
1 files changed, 2 insertions, 0 deletions
diff --git a/Modules/Compiler/GNU-C.cmake b/Modules/Compiler/GNU-C.cmake
index ca286b3..8105a77 100644
--- a/Modules/Compiler/GNU-C.cmake
+++ b/Modules/Compiler/GNU-C.cmake
@@ -1,6 +1,8 @@
include(Compiler/GNU)
__compiler_gnu(C)
+set(CMAKE_C_COMPILE_OPTIONS_EXPLICIT_LANGUAGE -x c)
+
if (NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 4.5)
set(CMAKE_C90_STANDARD_COMPILE_OPTION "-std=c90")
set(CMAKE_C90_EXTENSION_COMPILE_OPTION "-std=gnu90")