The following patch was installed on gnulib but it looks inadvertent.
I assume it's OK for me to revert it? Or perhaps you could revert it.
Index: bison.m4
===================================================================
RCS file: /cvsroot/gnulib/gnulib/m4/bison.m4,v
retrieving revision 1.4
retrieving revision 1.5
diff -p -u -r1.4 -r1.5
--- bison.m4 23 Jan 2005 08:06:57 -0000 1.4
+++ bison.m4 31 May 2005 21:01:36 -0000 1.5
@@ -7,7 +7,17 @@
AC_DEFUN([gl_BISON],
[
+dnl All this cruft, which tries to fail harmlessly when bison is not present,
+dnl will no longer be necessary after we require an Automake release 1.10 or
+dnl later, as those avoid generating .c files from .y when not in maintainer
+dnl mode. This is currently a fork from the GNULIB version of this file.
# getdate.y works with bison only.
- : ${YACC='bison -y'}
- AC_SUBST(YACC)
+ AM_MISSING_PROG(YACC, bison -y)
+ AC_ARG_VAR(YACC,
+[The `Yet Another C Compiler' implementation to use. Defaults to `bison -y'.
+Values other than `bison -y' will most likely break on most systems.])
+ AC_ARG_VAR(YFLAGS,
+[YFLAGS contains the list arguments that will be passed by default to Bison.
+This script will default YFLAGS to the empty string to avoid a default value of
+`-d' given by some make applications.])
])
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