cf: Restore AC_KRB_PROG_YACC to life
Using `AC_PROG_YACC` means accepting that `bison` gets invoked in yacc compatibility mode (i.e., with the `-y` command-line option). In recent versions Bison has started to warn about use of Bison extensions when in yacc compatibility mode -- even for things yacc itself accepts but which it doesn't document. I've confirmed that `bison -d` and `byacc -d` both work for the ASN.1 compiler.
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@@ -1,12 +1,18 @@
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dnl $Id$
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dnl
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dnl
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dnl We prefer byacc or yacc because they do not use `alloca'
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dnl OLD: We prefer byacc or yacc because they do not use `alloca'
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dnl
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dnl CURRENT: We don't mind `alloca', but we do mind `bison -y' because
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dnl newer versions of `bison', with `-y' complain about %expect and
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dnl anything that yacc didn't document. Because `bison' typically
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dnl also installs a `yacc' link that acts like `bison y', we put
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dnl `yacc' last in this list.
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dnl
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AC_DEFUN([AC_KRB_PROG_YACC],
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[AC_CHECK_PROGS(YACC, byacc yacc 'bison -y')
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[AC_CHECK_PROGS(YACC, 'bison -d' 'byacc -d' yacc)
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if test "$YACC" = ""; then
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AC_MSG_WARN([yacc not found - some stuff will not build])
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AC_MSG_WARN([byacc and bison not found - some stuff will not build])
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fi
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])
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@@ -59,8 +59,8 @@ if ! test -f "$srcdir/lib/asn1/der-protos.h" ||
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AC_KRB_PERL_MOD(JSON)
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fi
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dnl AC_KRB_PROG_YACC
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AC_PROG_YACC
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AC_KRB_PROG_YACC
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dnl AC_PROG_YACC
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AM_PROG_LEX
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AS_IF([$LEX --nounput -V > /dev/null 2>&1 && test $? -eq 0],
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[AC_SUBST([FLEXNOUNPUTARGS], ["--nounput"])],
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