Re: [Qemu-devel] [PATCH v3 2/2] avx2 configure: Use primitives in test

["Dr. David Alan Gilbert" <dgilbert@redhat.com>]

* Aaron Lindsay (alindsay@codeaurora.org) wrote:
> On Jun 10 12:16, Dr. David Alan Gilbert (git) wrote:
> > From: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
> > 
> > Use the avx2 primitives during the test, thus making sure that the
> > compiler and assembler could actually use avx2.
> > 
> > This also detects the failure case on gcc 4.8.x with -save-temps
> > and avoids the need for the gcc version check in cutils.
> 
> I'm getting a segfault when running the latest tip compiled with gcc
> 4.8.4 on Ubuntu 14.04 and I've bisected it to this commit.
> 
> # gcc --version
> gcc (Ubuntu 4.8.4-2ubuntu1~14.04) 4.8.4
> 
> I'm configuring with:
> # ./configure \
>     --static \
> 	--disable-gtk \
> 	--target-list=aarch64-softmmu
> 
> When run under gdb, I get:
> Program received signal SIGSEGV, Segmentation fault.
> buffer_find_nonzero_offset_ifunc () at ./util/cutils.c:333
> 333     {
> (gdb) bt
> #0  buffer_find_nonzero_offset_ifunc () at ./util/cutils.c:333
> #1  0x0000000000939c58 in __libc_start_main ()
> #2  0x0000000000419337 in _start ()
> 
> I confess I don't understand the intricacies here, but I'm willing to
> test fixes if you have any ideas for how to make this also work for my
> compiler without blindly excluding all gcc < 4.9.

Does it work if you configure without the --static?

Dave

> 
> -Aaron
--
Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK