931043 - don't use AC_TRY_RUN to check for how to copy va_args

Status: RESOLVED FIXED

(Firefox Build System :: General, defect)

Description

[Nathan Froyd [:froydnj]]

It doesn't work in cross configurations, and we just get lucky with our current crosses.

I appreciate the zealousness of making sure things run, but a simple compile check should be enough to see whether we have the right bits.

Comment 1

[Nathan Froyd [:froydnj]]

Attachment: use AC_TRY_COMPILE to check for how to copy va_args

We shouldn't need to run these programs; compiling them should be enough.

While we're at it, we can remove support for __va_copy, which, AFAICS, is an
old GNU extension and has been superseded by va_copy by anyplace that cares.

Comment 2

[Nathan Froyd [:froydnj]]

https://hg.mozilla.org/integration/mozilla-inbound/rev/7a079294517b

Comment 3

[Ryan VanderMeulen [:RyanVM]]

https://hg.mozilla.org/mozilla-central/rev/7a079294517b