Re: 1.5 automatically generating C++, F77 tags

[Albert Chin]

On Tue, Jun 03, 2003 at 01:08:17AM +0200, Alexandre Duret-Lutz wrote:
> >>> "Albert" == Albert Chin <address@hidden> writes:
> 
>  Albert> On Mon, Jun 02, 2003 at 05:06:42PM -0500, Bob Friesenhahn wrote:
>  >> On Mon, 2 Jun 2003, Albert Chin wrote:
>  >> 
>  >> > It's really annoying to have 1.5 automatically generate the C++ and
>  >> > F77 tags. I'm trying to figure out why it does this. We have the
>  >> > following in libtool.m4:
>  >> >   dnl If AC_PROG_CXX has already been expanded, run AC_LIBTOOL_CXX
>  >> >   dnl immediately, otherwise, hook it in at the end of AC_PROG_CXX.
>  >> >     AC_PROVIDE_IFELSE([AC_PROG_CXX],
>  >> >       [AC_LIBTOOL_CXX],
>  >> >       [define([AC_PROG_CXX], defn([AC_PROG_CXX])[AC_LIBTOOL_CXX
>  >> >     ])])
> 
> [...]
> 
>  Albert> I'm trying to do it automatically. I want to run AC_LIBTOOL_CXX 
> *only*
>  Albert> if AC_PROG_CXX is called. Can autoconf do this?
> 
> Automake setups its dependency tracking code for various
> languages with code similar to the above.  Actually, the above
> would work if Libtool was not running expanding AC_PROG_CXX
> itself! (This happens when AC_LIBTOOL_LANG_CXX_CONFIG is
> expanded in _LT_AC_TAGCONFIG.)
> 
> As I see it, the only way to achieve what you want would be to
> rewrite the `case $tagname' switch from _LT_AC_TAGCONFIG in
> plain M4 (instead of shell).  This way you can ensure that
> AC_LIBTOOL_LANG_CXX_CONFIG is expanded only if AC_PROG_CXX has
> been called first.  Likewise for other languages.  However I
> don't think you can do this and still allow AC_PROC_CXX to be
> called after AC_PROG_LIBTOOL.

I don't have a problem requiring AC_PROG_CXX, AC_PROG_F77, or
AM_PROG_GCJ before AC_PROG_LIBTOOL. Anyone see this as a problem?

-- 
albert chin (address@hidden)