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

Phil Edwards phil@jaj.com
Wed Oct 2 19:41:00 GMT 2002

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
>      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.


I would therefore like to posit that computing's central challenge, viz. "How
not to make a mess of it," has /not/ been met.
                                                 - Edsger Dijkstra, 1930-2002

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