On 03/22/2011 02:53 PM, Ken Brown wrote: > For a long time, the autoconf mmap test has failed on Cygwin even though > Cygwin has a working mmap. This was reported to bug-autoconf in > November 2009, and a patch that fixed it for Cygwin was submitted by > Eric Blake: > > http://lists.gnu.org/archive/html/bug-autoconf/2009-11/msg00015.html
And that patch was applied in autoconf 2.65. Per the NEWS: * Major changes in Autoconf 2.65 (2009-11-21) [stable] ** The AC_FUNC_MMAP macro has been fixed to be portable to systems like Cygwin (bug present since macro was introduced in 2.0). > Is there any chance of getting this bug fixed? At this point, the only places where the bug still exists in the wild are packages that use autoconf < 2.65 to generate their configure file. > Currently, the cygport > tool (which many Cygwin package maintainers use to build packages) works > around it by exporting > > ac_cv_func_mmap_fixed_mapped=yes And this is the correct way to work around such packages if you want to avoid rerunning autoconf with a newer version. -- Eric Blake [email protected] +1-801-349-2682 Libvirt virtualization library http://libvirt.org
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