[Qemu-devel] [FYI] Need to do a full rebuild if you are on Linux x86 host

[Qemu-devel] [FYI] Need to do a full rebuild if you are on Linux x86 host

[Anthony Liguori]

Due to this commit:

commit 40d6444e91c6ab17e5e8ab01d4eece90cbc4afed
Author: Avi Kivity <avi@redhat.com>
Date:   Tue Nov 15 20:12:17 2011 +0200

     configure: build position independent executables on x86-Linux hosts

PIE binaries cannot be linked with non-PIE binaries and make is not smart enough 
to rebuild when the CFLAGS have changed.

Regards,

Anthony Liguori

Re: [Qemu-devel] [FYI] Need to do a full rebuild if you are on Linux x86 host

[Gerd Hoffmann]

On 11/22/11 01:25, Anthony Liguori wrote:
> Due to this commit:
> 
> commit 40d6444e91c6ab17e5e8ab01d4eece90cbc4afed
> Author: Avi Kivity <avi@redhat.com>
> Date:   Tue Nov 15 20:12:17 2011 +0200
> 
>     configure: build position independent executables on x86-Linux hosts
> 
> PIE binaries cannot be linked with non-PIE binaries and make is not
> smart enough to rebuild when the CFLAGS have changed.

Breaks build on RHEL-5 and probably also other not-so-recent linux distros.

[ ... ]
  CC    i386-softmmu/exec.o
[ ... ]
  LINK  i386-softmmu/qemu-system-i386
/usr/bin/ld: exec.o: relocation R_X86_64_TPOFF32 against
`tls__cpu_single_env' can not be used when making a shared object;
recompile with -fPIC
exec.o: could not read symbols: Bad value
collect2: ld returned 1 exit status
make[1]: *** [qemu-system-i386] Error 1
make: *** [subdir-i386-softmmu] Error 2

cheers,
  Gerd

PS: for those with ipv6 connectivity the full log is available at
http://spunk.home.kraxel.org/bb/builders/rhel5-default/builds/98/steps/compile/logs/stdio

Re: [Qemu-devel] [FYI] Need to do a full rebuild if you are on Linux x86 host

[Paolo Bonzini]

On 11/22/2011 10:41 AM, Gerd Hoffmann wrote:
> On 11/22/11 01:25, Anthony Liguori wrote:
>> Due to this commit:
>>
>> commit 40d6444e91c6ab17e5e8ab01d4eece90cbc4afed
>> Author: Avi Kivity<avi@redhat.com>
>> Date:   Tue Nov 15 20:12:17 2011 +0200
>>
>>      configure: build position independent executables on x86-Linux hosts
>>
>> PIE binaries cannot be linked with non-PIE binaries and make is not
>> smart enough to rebuild when the CFLAGS have changed.
>
> Breaks build on RHEL-5 and probably also other not-so-recent linux distros.
>
> [ ... ]
>    CC    i386-softmmu/exec.o
> [ ... ]
>    LINK  i386-softmmu/qemu-system-i386
> /usr/bin/ld: exec.o: relocation R_X86_64_TPOFF32 against
> `tls__cpu_single_env' can not be used when making a shared object;
> recompile with -fPIC
> exec.o: could not read symbols: Bad value
> collect2: ld returned 1 exit status
> make[1]: *** [qemu-system-i386] Error 1
> make: *** [subdir-i386-softmmu] Error 2

It can be worked around by replacing "-fpie" with "-fpic" or (to avoid a 
rather bad performance degradation) "-fpic -ftls-model=initial-exec" but 
it's a bug in the linker and it should be fixed in RHEL:

http://sourceware.org/bugzilla/show_bug.cgi?id=10434 (upstream BZ)
https://bugzilla.redhat.com/show_bug.cgi?id=755872 (RHEL BZ)

Paolo

Re: [Qemu-devel] [FYI] Need to do a full rebuild if you are on Linux x86 host

[Avi Kivity]

On 11/22/2011 12:01 PM, Paolo Bonzini wrote:
> On 11/22/2011 10:41 AM, Gerd Hoffmann wrote:
>> On 11/22/11 01:25, Anthony Liguori wrote:
>>> Due to this commit:
>>>
>>> commit 40d6444e91c6ab17e5e8ab01d4eece90cbc4afed
>>> Author: Avi Kivity<avi@redhat.com>
>>> Date:   Tue Nov 15 20:12:17 2011 +0200
>>>
>>>      configure: build position independent executables on x86-Linux
>>> hosts
>>>
>>> PIE binaries cannot be linked with non-PIE binaries and make is not
>>> smart enough to rebuild when the CFLAGS have changed.
>>
>> Breaks build on RHEL-5 and probably also other not-so-recent linux
>> distros.
>>
>> [ ... ]
>>    CC    i386-softmmu/exec.o
>> [ ... ]
>>    LINK  i386-softmmu/qemu-system-i386
>> /usr/bin/ld: exec.o: relocation R_X86_64_TPOFF32 against
>> `tls__cpu_single_env' can not be used when making a shared object;
>> recompile with -fPIC
>> exec.o: could not read symbols: Bad value
>> collect2: ld returned 1 exit status
>> make[1]: *** [qemu-system-i386] Error 1
>> make: *** [subdir-i386-softmmu] Error 2
>
> It can be worked around by replacing "-fpie" with "-fpic" or (to avoid
> a rather bad performance degradation) "-fpic -ftls-model=initial-exec"
> but it's a bug in the linker and it should be fixed in RHEL:
>
> http://sourceware.org/bugzilla/show_bug.cgi?id=10434 (upstream BZ)
> https://bugzilla.redhat.com/show_bug.cgi?id=755872 (RHEL BZ)

I'll extend the configure build test to include a tls variable.  If
anyone's interested in tweaking it for older distros, that's for 1.1.

-- 
error compiling committee.c: too many arguments to function