Re: Libtool makes configure scripts check for unneeded compilers

[Peter Eisentraut]

Albert Chin writes:

> > And when I run it it checks for g++ and g77 and runs the whole libtool
> > test range for those compilers.  Does anyone know why?
>
> Check the thread from last week. I'll try to post my patch by this
> weekend to fix this.
>   http://mail.gnu.org/archive/html/libtool/2003-06/msg00006.html

It seems that the code is already set up to select the right tags
automatically, but it just doesn't work.  In AC_PROG_LIBTOOL:

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
  ])])

This means, if AC_PROG_CXX has already been called, call AC_LIBTOOL_CXX.
Else, change AC_PROG_CXX to include AC_LIBTOOL_CXX automatically, in case
it is called later.  But if AC_PROG_CXX is never called, AC_LIBTOOL_CXX
should also never be called.  But that doesn't happen.  Why?

-- 
Peter Eisentraut   address@hidden