Re: [libvirt] gnulib compiler warning detection broken on RHEL5 autoconf

On 07/26/2011 04:45 AM, Daniel P. Berrange wrote: > I was wondering why I didn't see any compile warnings from the broken > gnutls code on RHEL5 when I noticed that we were building without any > compiler warning flags at all. > > It seems configure fails on RHEL5 vintage autoconf > > checking whether compiler handles -Wall... ./configure: line 75468: > ${$as_gl_Warn+set}: bad substitution Yuck. I'll take a look (it may be that older autoconf has a bug, and I merely need to backport a workaround for that bug fix). > I'm guessing it is the gl_WARN_ADD() macro that is at fault somehow. Very possible, in fact, it may be a case of gl_WARN_ADD using an autoconf macro and assuming newer semantics, where a bit more work is needed to guarantee support with autoconf 2.59.