Re: [RFC PATCH] configure check for ld's --no-relax flag

[Andrey Borzenkov <arvidjaar@gmail.com>]

В Mon, 04 Aug 2014 10:45:22 +0400
Stanislav Kholmanskikh <stanislav.kholmanskikh@oracle.com> пишет:

> Hi!
> 
> On 08/01/2014 07:40 PM, Vladimir 'φ-coder/phcoder' Serbinenko wrote:
> > On 01.08.2014 17:35, Andrey Borzenkov wrote:
> >> В Fri,  1 Aug 2014 16:15:56 +0400
> >> Stanislav Kholmanskikh <stanislav.kholmanskikh@oracle.com> пишет:
> >>
> >>> Early versions of binutils doesn't support --no-relax flag, so
> >>> commit 063f2a04d158ec1b275a925dfbae74b124708cde prevents building
> >>> with such versions.
> >>>
> >>> Signed-off-by: Stanislav Kholmanskikh <stanislav.kholmanskikh@oracle.com>
> >>> ---
> >>>   conf/Makefile.common |    8 ++++++++
> >>>   configure.ac         |   10 ++++++++++
> >>>   2 files changed, 18 insertions(+), 0 deletions(-)
> >>>
> >>> diff --git a/conf/Makefile.common b/conf/Makefile.common
> >>> index e4c301f..5bda66f 100644
> >>> --- a/conf/Makefile.common
> >>> +++ b/conf/Makefile.common
> >>> @@ -8,11 +8,19 @@ unexport LC_ALL
> >>>   # Platform specific options
> >>>   if COND_sparc64_ieee1275
> >>>     CFLAGS_PLATFORM += -mno-app-regs
> >>> +if COND_LD_SUPPORTS_NO_RELAX
> >>>     LDFLAGS_PLATFORM = -Wl,-melf64_sparc -Wl,--no-relax
> >>> +else
> >>> +  LDFLAGS_PLATFORM = -Wl,-melf64_sparc -mno-relax
> >>> +endif
> >>
> >> TBO I think commit should simply be reverted. "Uniformity" is rather
> >> poor excuse for breaking existing systems.
> >>
> > This commit is needed for clang to compile for sparc64. Given that
> > sparc64 clang still doesn't really work I'm ok with reverting, at least
> > for now.
> 
> But, it this case, maybe it would be better to consider 
> reviewing/applying this patch? Just to not return to this issue after 
> some time?
> 
> Andrey, Vladimir, what do you think?
> 

Yes, commit message was pretty confusing. This leaves the question,
whether combination of clang and binutils that do not support
-Wl,--no-relax exists though :) Otherwise I agree, we should use this
patch.