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-rw-r--r--third_party/heimdal/cf/krb-prog-yacc.m418
1 files changed, 18 insertions, 0 deletions
diff --git a/third_party/heimdal/cf/krb-prog-yacc.m4 b/third_party/heimdal/cf/krb-prog-yacc.m4
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+dnl $Id$
+dnl
+dnl
+dnl OLD: We prefer byacc or yacc because they do not use `alloca'
+dnl
+dnl CURRENT: We don't mind `alloca', but we do mind `bison -y' because
+dnl newer versions of `bison', with `-y' complain about %expect and
+dnl anything that yacc didn't document. Because `bison' typically
+dnl also installs a `yacc' link that acts like `bison y', we put
+dnl `yacc' last in this list.
+dnl
+
+AC_DEFUN([AC_KRB_PROG_YACC],
+[AC_CHECK_PROGS(YACC, 'bison -d' 'byacc -d' yacc)
+if test "$YACC" = ""; then
+ AC_MSG_WARN([byacc and bison not found - some stuff will not build])
+fi
+])