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Re: test-rwlock1 failing on latest Fedora Rawhide

From: Richard W.M. Jones
Subject: Re: test-rwlock1 failing on latest Fedora Rawhide
Date: Wed, 23 Jan 2019 21:14:30 +0000
User-agent: Mutt/1.5.21 (2010-09-15)

On Thu, Jan 24, 2019 at 12:03:21AM +0300, Dmitry V. Levin wrote:
> Hi,
> On Wed, Jan 23, 2019 at 08:45:06PM +0000, Richard W.M. Jones wrote:
> > On Wed, Jan 23, 2019 at 09:01:19PM +0100, Bruno Haible wrote:
> [...]
> > I checked the history of the Fedora package which adds these flags, and
> > it seems like --as-needed was added for:
> > 
> > https://fedoraproject.org/wiki/Changes/RemoveExcessiveLinking
> > 
> > Removing -Wl,--as-needed fixes the problem.  However I'm still unclear
> > about this.  Is Fedora wrong?  Is hivex using gnulib wrongly?  Is
> > gnulib wrong?
> We also build everything with --as-needed by default, but
> gnulib does the right thing nowadays by using
> -Wl,--push-state -Wl,--no-as-needed -lpthread -Wl,--pop-state
> instead of plain -lpthread.

hivex is using a very recent gnulib (34290cb926).

The test is linked with:

/bin/sh ../../libtool --tag=CC --preserve-dup-deps --mode=link gcc -O2
-g -pipe -Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2
-Wp,-D_GLIBCXX_ASSERTIONS -fexceptions -fstack-protector-strong
-grecord-gcc-switches -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1
-specs=/usr/lib/rpm/redhat/redhat-annobin-cc1 -m64 -mtune=generic
-fasynchronous-unwind-tables -fstack-clash-protection -fcf-protection
-Wl,-z,relro -Wl,--as-needed -Wl,-z,now
-specs=/usr/lib/rpm/redhat/redhat-hardened-ld -o test-thread_create
test-thread_create.o libtests.a ../../gnulib/lib/libgnu.la libtests.a
-pthread -Wl,--push-state -Wl,--no-as-needed -lpthread -Wl,--pop-state

As you can see from the last bit, the --push-state ... --pop-state
seems correct.  Yet the test still fails.


Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
Read my programming and virtualization blog: http://rwmj.wordpress.com
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