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-rw-r--r--Modules/CheckIncludeFiles.cmake2
1 files changed, 2 insertions, 0 deletions
diff --git a/Modules/CheckIncludeFiles.cmake b/Modules/CheckIncludeFiles.cmake
index bef11a5..56b7e32 100644
--- a/Modules/CheckIncludeFiles.cmake
+++ b/Modules/CheckIncludeFiles.cmake
@@ -34,6 +34,8 @@
# See modules :module:`CheckIncludeFile` and :module:`CheckIncludeFileCXX`
# to check for a single header file in ``C`` or ``CXX`` languages.
+include_guard(GLOBAL)
+
macro(CHECK_INCLUDE_FILES INCLUDE VARIABLE)
if(NOT DEFINED "${VARIABLE}")
set(CMAKE_CONFIGURABLE_FILE_CONTENT "/* */\n")