On 01/02/2011 18:01, H.J. Lu wrote:
>>> FWIW, your recan linker patch doesn't fix LTO 8, which is:
>>>
>>> http://sourceware.org/bugzilla/show_bug.cgi?id=12277
>> It wasn't supposed to, we've been through this before. It needs both the
>> link-order fix *and* the rescan-libs fix. The combined pair of patches I
>> sent
>> Joel (one of which is indeed that first patch, the second of which is for lib
>> rescanning) *does* fix LTO 8 on i686/Linux, I tested it.
>>
>
> I applied 2 patches of yours, With gcc version 4.6.0 revision 169143, I got
>
> /usr/gcc-4.6/bin/gcc
> -B/export/build/gnu/binutils-lto/build-i686-linux/ld/tmpdir/ld/
> -L/usr/local/i686-linux/lib -L/usr/local/lib -L/lib -L/usr/lib -m32
> -o tmpdir/lto-8.exe
> -L/net/gnu-6/export/gnu/src/binutils/binutils/ld/testsuite/ld-plugin
> -O2 -flto -fuse-linker-plugin tmpdir/lto-8b.o tmpdir/lto-8a.o
> tmpdir/dummy.o
> Executing on host: sh -c {/usr/gcc-4.6/bin/gcc
> -B/export/build/gnu/binutils-lto/build-i686-linux/ld/tmpdir/ld/
> -L/usr/local/i686-linux/lib -L/usr/local/lib -L/lib -L/usr/lib -m32
> -o tmpdir/lto-8.exe
> -L/net/gnu-6/export/gnu/src/binutils/binutils/ld/testsuite/ld-plugin
> -O2 -flto -fuse-linker-plugin tmpdir/lto-8b.o tmpdir/lto-8a.o
> tmpdir/dummy.o 2>&1} /dev/null ld.tmp (timeout = 300)
> /export/build/gnu/binutils-lto/build-i686-linux/ld/tmpdir/ld/ld:
> tmpdir/lto-8.exe: hidden symbol `bar' isn't defined
> /export/build/gnu/binutils-lto/build-i686-linux/ld/tmpdir/ld/ld: final
> link failed: Bad value
> collect2: ld returned 1 exit status
*facepalm* D'oh, sorry for the confusion. I got mixed up with LTO 2, which
is the missing -lm reference problem; it resolves that one. Sorry, this is
the left-over undefined symbols problem, that is going to need a further patch.
cheers,
DaveK
