add ifndef convenience macro

2006-06-12 15:49:48 +00:00 · 2006-06-12 15:49:48 +00:00 · 06b9bd1a23
parent 8e86e4e7a1
commit 06b9bd1a23
1 changed files with 7 additions and 0 deletions
--- a/refpolicy/policy/support/misc_macros.spt
+++ b/refpolicy/policy/support/misc_macros.spt
@ -11,6 +11,13 @@
 #
 define(`shiftn',`ifelse($1,0,`shift($*)',`shiftn(decr($1),shift(shift($*)))')')

+#
+# ifndef(expr,true_block,false_block)
+#
+# m4 does not have this.
+#
+define(`ifndef',`ifdef(`$1',`$3',`$2')')
+
 #
 # __endline__
 #