Provide header guards to prevent re-inclusion

Per LGTM analysis: https://lgtm.com/projects/g/Perl/perl5/alerts/?mode=tree&ruleFocus=2163210746

and LGTM recommendation: https://lgtm.com/rules/2163210746/

For: RT 133699

1 files changed, 6 insertions, 0 deletions

diff --git a/regcomp.h b/regcomp.h
index 923058b32f..c76edd7649 100644
--- a/regcomp.h
+++ b/regcomp.h
@@ -7,6 +7,10 @@
  *    License or the Artistic License, as specified in the README file.
  *
  */
+
+#ifndef PERL_REGCOMP_H_
+#define PERL_REGCOMP_H_
+
 #include "regcharclass.h"
 
 /* Convert branch sequences to more efficient trie ops? */
@@ -1118,6 +1122,8 @@ typedef enum {
 	WB_BOUND
 } bound_type;
 
+#endif /* PERL_REGCOMP_H_ */
+
 /*
  * ex: set ts=8 sts=4 sw=4 et:
  */