On 3/22/2011 5:53 PM, Ken Brown wrote:
On 3/22/2011 4:59 PM, Eric Blake wrote:
On 03/20/2011 02:51 PM, Ken Brown wrote:
What's the status of the broken autoconf mmap test, which always fails
on Cygwin even though Cygwin has a working mmap?
Autoconf 2.65 and newer do not have the bug. But packages still exist
where configure was generated with< 2.65, so these packages still have
the bug unless you either rerun newer autoconf, or pre-seed the cache.
Was this ever resolved? I see that cygport is still using the workaround
export ac_cv_func_mmap_fixed_mapped=yes
This workaround is still necessary, as long as there are still packages
that don't run autoreconf and where configure was generated with a
too-old autoconf.
I'm still seeing failures when building both emacs and texlive, even
after autoreconf with the current (2.68) version installed. Attached is
the relevant portion of config.log from an emacs build. This is a build
of the current emacs trunk, after running 'autoreconf -I m4'. The same
thing happens if I build emacs-23.3. If you want to try to reproduce
it, here's the source:
wget http://ftp.gnu.org/pub/gnu/emacs/emacs-23.3.tar.gz
In case it's relevant, my system is 64-bit Windows 7, with the most
recent cygwin snapshot:
$ uname -a
CYGWIN_NT-6.1-WOW64 moufang 1.7.9s(0.236/5/3) 20110318 10:29:21 i686 Cygwin
I've just checked that the mmap test succeeds (again when configuring
emacs-23.3) on an XP SP3 system with the same snapshot installed:
$ uname -a
CYGWIN_NT-5.1 Desktop 1.7.9s(0.236/5/3) 20110318 10:29:21 i686 Cygwin
So maybe this is really a problem with Cygwin's mmap (under Win 7) and
not an autoconf problem after all.
Ken
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