Re: Update LTO plugin interface

[Ian Lance Taylor <iant at google dot com>]

"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?

Ian