Re: Update LTO plugin interface

["H.J. Lu" <hjl dot tools at gmail dot com>]

On Wed, Dec 1, 2010 at 12:37 PM, Ian Lance Taylor <iant@google.com> wrote:
> "H.J. Lu" <hjl.tools@gmail.com> writes:
>
>> We don't want to put all unclaimed files passed to plugin back to linker.
>> On Linux,
>>
>> [hjl@gnu-6 gcc-lto]$ cat /usr/lib/libc.so
>> /* GNU ld script
>> ? ?Use the shared library, but some functions are only in
>> ? ?the static library, so try that secondarily. ?*/
>> OUTPUT_FORMAT(elf32-i386)
>> GROUP ( /lib/libc.so.6 /usr/lib/libc_nonshared.a ?AS_NEEDED (
>> /lib/ld-linux.so.2 ) )
>> [hjl@gnu-6 gcc-lto]$
>>
>> Linker should use /usr/lib/libc.so, not /lib/libc.so.6,
>> /usr/lib/libc_nonshared.a,
>> /lib/ld-linux.so.2, ?for final linker. ?With the new cmdline field,
>> plugin can only pass
>> those unclaimed files from linker command line back to linker for the
>> final link.
>
> Thanks, at least now I understand what the new field means: it is true
> for a file explicitly named on the command line, false for a file named
> in a linker script.
>
> Are you planning to have the plugin claim all files, even linker
> scripts, and then pass only the command line files back to the linker?
>

Plugin will keep the same claim strategy.  For those aren't claimed by
plugin, plugin will save and pass them back to linker only if they are
specified at command line.


-- 
H.J.