Re: [Fwd: PATCH: libstd++-v3 configure script and target mingw32]

[Ranjit Mathew <rmathew at hotmail dot com>]

Phil Edwards wrote:
> On Tue, Oct 01, 2002 at 12:23:45PM +0530, Ranjit Mathew wrote:
>
> >     21  # Gets build, host, target, *_vendor, *_cpu, *_os, etc.
> >     22  # AC 2.5x sets target_alias iff the user specified --target, 
> > but we use
> > it
> >     23  # everywhere, so we set it here just to be sure.  In AC 2.13
> >     24  # AC_CANONICAL_TARGET was known as AC_CANONICAL_SYSTEM.
> >     25  AC_CANONICAL_SYSTEM
> >     26  target_alias=${target_alias-$target}
> >     27  AC_SUBST(target_alias)
>
> That '-' isn't what you think it is, I think.  The construct on the right
> hand side of the equals means, "if target_alias is set, expand to that,
> but if target_alias is not set, expand to target instead."  The '-'
> doesn't appear in the output.
>
> We do this for the reason specified in the comment.  :-)  GCC hasn't been
> updated to use autoconf 2.5x, but I suspect they'll do something similar
> once they are.
>
> What /is/ target_alias being set to on your system?  The dash should
> be there.
OK, got it. I put in a few "echo's" in the configure script and
this is what I get (I explicitly specify "--target=mingw32"):

target_alias=mingw32    (Both before and after the assigment above)
target=i386-pc-mingw32  (Orig. "mingw32", changed by config.sub to this)

IMO then the "case switches" later should either be based on "target"
or should incorporate the teeny-weeny patch I submitted.

Sincerely Yours,
Ranjit Mathew.