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--- glossary:glossary_i [2021/08/11 09:24] – [ICSP] WortingUK
+++ glossary:glossary_i [2022/01/26 09:25] – [Include Guard] WortingUK
@@ Line 27: / Line 27: @@
  \\ [[http://www.kpsec.freeuk.com/components/lamp.htm|http://www.kpsec.freeuk.com/components/lamp.htm]]
+===== Include Guard =====
+A method of preventing a C or C++ header file, from being included more than once by the main file.
+''#ifndef _FILENAME_H
+#define _FILENAME_H
+// .... contents of the header file
+#endif /* _FILENAME_H */''
+If the compiler supports it then ''pragma once'' can be used.