AC_CANONICAL_SYSTEM overwrites $@

[Ben Pfaff]

I've seen a flurry of Debian BTS emails around this bug, but none
of them have made it clear to me what I should do about it.

In the long term, I suspect that the Autoconf macros in the
apr-util package should be fixed, and that autoconf-doc should
document that $@ may be changed by some macros.  In the short
term, I'm willing to help out, if necessary, by putting some kind
of Debian-specific patch that saves and restores the positional
parameters (if indeed there's a way to do that) around
AC_CANONICAL_SYSTEM.

What would you prefer?

-- 
"I don't want to learn the constitution and the declaration of
 independence (marvelous poetry though it be) by heart, and worship the
 flag and believe that there is a god and the dollar is its prophet."
--Maarten Wiltink in the Monastery