[Bug target/49392] New: [arm] spurious EABI version mismatches when LTO enabled

[Bug target/49392] New: [arm] spurious EABI version mismatches when LTO enabled

[philb at gnu dot org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49392

           Summary: [arm] spurious EABI version mismatches when LTO
                    enabled
           Product: gcc
           Version: 4.6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: philb@gnu.org
            Target: arm-linux


Attempting to build even a trivial executable with -flto yields:

pb@lander:~$ cat t.c
#include <stdio.h>
int main() { printf("Hello world"); }

pb@lander:~$ arm-oe-linux-gnueabi-gcc -flto t.c
/home/pb/oe/build-giga/tmp-eglibc/sysroots/x86_64-linux/libexec/armv6-oe-linux-gnueabi/gcc/arm-oe-linux-gnueabi/4.6.0/arm-oe-linux-gnueabi-ld:
error: Source object /tmp/cc60ozAJ.o.ironly\x04 has EABI version 0, but target
a.out has EABI version 5
/home/pb/oe/build-giga/tmp-eglibc/sysroots/x86_64-linux/libexec/armv6-oe-linux-gnueabi/gcc/arm-oe-linux-gnueabi/4.6.0/arm-oe-linux-gnueabi-ld:
failed to merge target specific data of file /tmp/cc60ozAJ.o.ironly\x04
collect2: ld returned 1 exit status
pb@lander:~$

[Bug target/49392] [arm] spurious EABI version mismatches when LTO enabled

[ramana at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49392

--- Comment #1 from Ramana Radhakrishnan <ramana at gcc dot gnu.org> 2011-06-14 11:31:55 UTC ---
It looks like a linker error but ... 

Hmmm with a later version of gcc 4.6 branch that I have lying around the same
example doesn't spew out such error messages. I don't have a 4.6.0 build handy
to try this. 

I seem to be running binutils  2.21.51.20110525 FTR.

cheers
Ramana

[Bug target/49392] [arm] spurious EABI version mismatches when LTO enabled

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49392

--- Comment #2 from Richard Guenther <rguenth at gcc dot gnu.org> 2011-06-14 12:40:03 UTC ---
There wasn't any change on the branch that would change this.

[Bug target/49392] [arm] spurious EABI version mismatches when LTO enabled

[philb at gnu dot org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49392

philb at gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|                            |INVALID

--- Comment #3 from philb at gnu dot org 2011-06-15 14:57:32 UTC ---
I just tried a different linker and that does seem to have made the problem go
away.  So I guess there is no gcc bug here.  Thanks.