On Thu, Feb 23, 2017 at 06:02:53PM +0300, Vladislav Dembskiy wrote: > Dear colleagues, > > I decided to rebuild glib-2.25 according to current development version of > LFS Book systemd using kernel headers 4.9.11 > I have got the following error during compilation: > > /sources/glibc-2.25/build/posix/sched_cpucount.o.dt -MT > /sources/glibc-2.25/build/posix/sched_cpucount.o > In file included from regex.c:67:0: > regexec.c: In function ‘check_node_accept_bytes’: > regexec.c:3856:29: error: ‘extra’ may be used uninitialized in this function > [-Werror=maybe-uninitialized] > const unsigned char *coll_sym = extra + cset->coll_syms[i]; > ^~~~~~~~ > > I have to add —disable-werror option to continue compilation. The only > deviation from the book only I use —enable-kernel=4.9.6 because my host > Gentoo use this kernel. > > Kind regards, > > Vladislav >
No idea, but rebuilding glibc is a dangerous procedure and most people will not need to do it. I've done it a few times in the past (once for an issue in sound, I think, and then fixing a vulnerability across all ny systens). I'd like to make two comments: 1. I've built current svn (sysv) with 4.9.11 headers on two machines. One was running 4.10-rc7 for the build, and that was all fine. The other was running 4.10.0, and there the gettext tests stalled at the start using all cores and I ended up not running those tests. So, 4.9.11 headers worked fine for me having to disable Werror, but as with all deviation it may introduce new problems. 2. I think using --enable-kernel is somewhat untested for stable releases of recent kernels. Possibly, specifying 4.9.0 might be safer. There are two definite downsides to specifying a very recent kernel: (i) If you hit a kernel problem and need to bisect, some of the kernels might claim to be older than what your glibc supports (probably only if you build a newer kernel) (ii) You also need to look at your rescue options - if your host system is not ok, will a rescue CD or similar be new enough ? I see that I am still using --enable-kernel=3.9.0 (yes, three) because the SystemRescueCD I use was running that. ĸen -- `I shall take my mountains', said Lu-Tze. `The climate will be good for them.' -- Small Gods -- http://lists.linuxfromscratch.org/listinfo/lfs-dev FAQ: http://www.linuxfromscratch.org/faq/ Unsubscribe: See the above information page
