On 08/02/2011 02:33 PM, Paul Eggert wrote:
On 08/02/11 11:12, Eric Blake wrote:
AC_CHECK_FUNCS_ONCE does not add the mandatory -pthread compiler
switch, and glibc only provides pthread_sigmask when compiling for
threads. This seems fishy to me; it seems like we have a bug in
pthread_sigmask.m4 for not recognizing glibc's version, and
populating $(LIB_PTHREAD_SIGMASK) with -pthread as appropriate.
pthread_sigmask depends on threadlib, which means this shouldn't be a problem.
threadlib arranges for -pthread (or whatever) as needed.
GNU Emacs avoids threadlib, and arranges for -pthread (or whatever)
itself. But that's fine: packages that avoid threadlib are supposed
to know what they're doing.
But the point is that even with the threadlib module and selection of
posix threads, we are getting ac_cv_func_pthread_sigmask=no and
subsequent rpl_pthread_sigmask on glibc, even though we don't need the
replacement in that case. There's a bug in the m4 file for using
AC_CHECK_FUNCS_ONCE without the right flags pre-determined by
havelib.m4, but I'm not sure how best to fix it.
--
Eric Blake [email protected] +1-801-349-2682
Libvirt virtualization library http://libvirt.org
