Merge branch 'maint'

[bison.git] / data / c.m4

diff --git a/data/c.m4 b/data/c.m4
index 84713884a589ea9ee6fa8bb15e100ff8ff36f8ca..3bc2c215df60c5373cc8bab1a5b039cb26af1f0e 100644 (file)
--- a/data/c.m4
+++ b/data/c.m4
@@ -30,7 +30,7 @@ m4_define([b4_tocpp],
 # ------------------
 # A valid C macro name to use as a CPP header guard for FILE.
 m4_define([b4_cpp_guard],
-[b4_tocpp(m4_defn([b4_prefix])/[$1])])
+[[YY_]b4_tocpp(m4_defn([b4_prefix])/[$1])[_INCLUDED]])
 
 
 # b4_cpp_guard_open(FILE)