> > > I can't say as I found it in any documentation. I pulled it out of
> > > other examples of its use in /usr/share/{aclocal,autoconf,automake}!
> You'll need to call
> AC_CHECK_PROGS(YACC, byacc yacc 'bison -y', [AM_MISSING_PROG(yacc)])
> instead of using the undocumented, unsupported, internal am_missing_run
That had worried me a little. Thanks for clarifying that.
> > > It might not be a public interface!
But you only care if you are a maintainer. And as noted, things will
work acceptably if it is not set. So even if catastrophy happens and
the interface changes things still work albeit in a simpler fashion.
It is a good bet for me.
> variable. Then run aclocal to pull in the macro definitions needed.
> Note that this _may_ require a recent automake (1.5 recommended).
> AC_CHECK_PROGS(YACC, byacc yacc 'bison -y', [AM_MISSING_PROG(yacc)])
With autoconf-2.52 and automake-1.5 I tried your example.
In config/yacc.m4:
AC_DEFUN([AC_PROG_YACC_SPECIAL],
[AC_CHECK_PROGS(YACC,xyacc xbyacc 'xbison -y',[AM_MISSING_PROG(yacc)])])
And in configure.ac I call it. This produces one failure per Makefile
such as this and the Makefile is zero lenth. As you can see I was
trying to force a not found and was going to test it.
config.status: creating Makefile
sed: file /tmp/csWzweyg/subs-2.sed line 17: Unterminated `s' command
But looking at the source for AM_MISSING_PROG in
/usr/share/aclocal/missing.m4 and other uses it looks like it should
always have two parameters, VARIABLE and NAME. So I tried this.
AC_DEFUN([AC_PROG_YACC_SPECIAL],
[AC_CHECK_PROGS(YACC,xyacc xbyacc 'xbison -y',[AM_MISSING_PROG(YACC,yacc)])])
config.status: creating Makefile
sed: file /tmp/cs3ldBbJ/subs-2.sed line 17: Unterminated `s' command
With the same result. Hmm... The use of the macro looks okay. Will
debug that later.
Bob
