Re: [Bug binutils/30281] error: multiple definition of `pwrite@GLIBC_2.2'; on i586-linux-gnu

["Martin Liška" <mliska@suse.cz>]

On 3/29/23 18:43, Vladimir Mezentsev via Binutils wrote:
> 
> 
> On 3/29/23 05:24, mliska at suse dot cz wrote:
>> https://sourceware.org/bugzilla/show_bug.cgi?id=30281
>>
>> Martin Liska <mliska at suse dot cz> changed:
>>
>>             What    |Removed                     |Added
>> ----------------------------------------------------------------------------
>>                   CC|                            |hjl.tools at gmail dot com
>>             Assignee|vladimir.mezentsev at oracle dot c |unassigned at sourceware dot org
>>                     |om                          |
>>               Status|ASSIGNED                    |NEW
>>            Component|gprofng                     |binutils
>>
>> --- Comment #3 from Martin Liska <mliska at suse dot cz> ---
>> Great, thank you Vladimir. I was able to isolate that and reduce it. It started
>> with 20ea3acc727f3be6322dfbd881e506873535231d and it's regression since
>> 20ea3acc727f3be6322dfbd881e506873535231d.
>>
>> $ cat iotrace.i
>> extern __inline __attribute__((__gnu_inline__)) void open64(int, ...) {}
>> int __attribute__((__symver__("open64@GLIBC_2.2"))) __collector_open64_2_2() {}
>> void open64(int, ...) {}
>>
>> $ cat libgprofng.ver
>> GLIBC_2.2 {
>>    global:
>>      open64;
>> };
>>
>> $ gcc iotrace.i -shared -fPIC -O2 -Wl,--version-script,libgprofng.ver
>> -flto-partition=max -flto=auto -B ~/Programming/binutils/objdir/ld -fuse-ld=bfd
>> /usr/bin/ld.bfd: /tmp/ccLS2iVj.ltrans1.ltrans.o: in function `open64':
>> <artificial>:(.text+0x0): multiple definition of `open64@GLIBC_2.2';
>> /tmp/ccLS2iVj.ltrans0.ltrans.o:<artificial>:(.text+0x0): first defined here
>> collect2: error: ld returned 1 exit status
>>
>> while -fuse-ld=mold or -fuse-ld=lld works fine. gold is also affected.
>>
>> @H.J. Can you please take a look?
>>


Hello.

(It seems the email hasn't reached bugzilla for some reason)

> 
>  How do you configure a build to set  -fuse-ld=lld ?

Build of binutils? You should be able to add (-fuse-ld=lld)to C{,CXX}FLAGS.

> 
> On Ol9, a build is configured with the -flto option. How can I turn it off ?

A build of binutils?

Martin

> 
> Thank you,
> -Vladimir
> 
>