Re: LTO with cross compiler and static linking

[Sebastian Huber <sebastian dot huber at embedded-brains dot de>]

On 03/19/2013 04:50 PM, Andrew Pinski wrote:
> On Tue, Mar 19, 2013 at 3:30 AM, Sebastian Huber
> <sebastian.huber@embedded-brains.de>  wrote:
> > >Hello,
> > >
> > >I test currently the GCC 4.8 release candidate.  Some GCC LTO tests fail for
> > >me since the introduction of LTO in GCC.  I use Binutils 2.23.1 for PowerPC
> > >EABI (powerpc-rtems4.11 target) configured with:
> > >
> > >/scratch/archive/binutils-2.23.1/configure --target=powerpc-rtems4.11
> > >--prefix=/scratch/install-4.8.0-RC-20130316 --disable-werror --enable-lto
> > >
> > >For GCC I use:
> > >
> > >/scratch/archive/gcc-4.8.0-RC-20130316/configure --disable-werror
> > >--enable-threads=rtems --with-gnu-as --disable-multilib --enable-lto
> > >--enable-newlib-mb --enable-newlib-iconv --with-gnu-ld --with-newlib
> > >--verbose --with-system-zlib --disable-nls
> > >--enable-version-specific-runtime-libs --enable-languages=c,c++
> > >--target=powerpc-rtems4.11 --prefix=/scratch/install-4.8.0-RC-20130316
>
> The easiest fix is inside the GCC testsuite itself.  In
> testsuite/gcc.c-torture/execute/builtins/builtins.exp change:
> if { [istarget *-*-eabi*]
>       || [istarget *-*-elf] } {
>     lappend additional_flags "-Wl,--allow-multiple-definition"
> }
> To:
> if { [istarget *-*-eabi*]
>       || [istarget *-*-elf]
>       || [istarget *-*-rtems*]} {
>     lappend additional_flags "-Wl,--allow-multiple-definition"
> }

Ok, so you say that this multiple definition with LTO is intentional for 
statically linked applications?

--
Sebastian Huber, embedded brains GmbH

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