[Buildroot] [PATCH 1/1] libbsd: remove usage of __register_atfork

Yann E. MORIN yann.morin.1998 at free.fr
Wed Nov 28 18:57:38 UTC 2018


On 2018-11-28 18:04 +0100, Fabrice Fontaine spake thusly:
> Dear all,
> Le dim. 14 oct. 2018 à 10:58, Thomas Petazzoni
> <thomas.petazzoni at bootlin.com> a écrit :
> >
> > Hello,
> >
> > +Arnout in Cc.
> >
> > On Wed,  3 Oct 2018 19:54:09 +0200, Fabrice Fontaine wrote:
> > > The following error is raised by minizip:
> > >
> > > [100%] Linking C executable minizip
> > > /home/peko/autobuild/instance-0/output/host/m68k-buildroot-uclinux-uclibc/sysroot/usr/lib/libbsd.a(arc4random.o): In function `_rs_init.part.1':
> > > arc4random.c:(.text+0xaa): undefined reference to `__register_atfork'
> > > collect2: error: ld returned 1 exit status
> > >
> > > As specified in openssl/Config.in, uClibc on noMMU doesn't provide
> > > __register_atfork() so, as suggested by Arnout during review of minizip
> > > patch (https://patchwork.ozlabs.org/patch/978000), remove usage of this
> > > function from libbsd to always use pthread_atfork
> > >
> > > Fixes:
> > >  - http://autobuild.buildroot.org/results/df2dcbdceaa01a2ae37bf09140e4dbef0a5b9489
> > >
> > > Signed-off-by: Fabrice Fontaine <fontaine.fabrice at gmail.com>
> > > ---
> > >  ...02-Remove-usage-of-__register_atfork.patch | 39 +++++++++++++++++++
> > >  1 file changed, 39 insertions(+)
> > >  create mode 100644 package/libbsd/0002-Remove-usage-of-__register_atfork.patch
> >
> > With this change, the build fails in the CI of libbsd:
> > https://gitlab.freedesktop.org/ffontaine/libbsd/-/jobs/26984:

That's because the test should link with -pthread, maybe something not
too far fromm:

    overlay_LDADD = -pthread

(totally untested)

> > http://refspecs.linuxbase.org/LSB_3.0.0/LSB-PDA/LSB-PDA/baselib--register-atfork.html.
> OK, so I'll send a new patch to remove this change and add the
> following dependency on libbsd and minizip:
> # uClibc on noMMU doesn't provide __register_atfork()
> depends on !(BR2_TOOLCHAIN_USES_UCLIBC && !BR2_USE_MMU)

Works for me too, I guess, until upstream fixes their mess.

Regards,
Yann E. MORIN.

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