* bison.m4: Back out inadvertant change.

diff --git a/m4/bison.m4 b/m4/bison.m4
index 892293a..273b641 100644 (file)
--- a/m4/bison.m4
+++ b/m4/bison.m4
@@ -7,17 +7,7 @@
 
 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.
-  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.])
+  : ${YACC='bison -y'}
+  AC_SUBST(YACC)
 ])