This patch enables both ld and gold in gcc using the -fuse-ld switch. The
original patch use written by Nick Clifton and was subsequently updated by
Matthias Klose. The patch currently does not work with LTO but that is
okay for now and it is no worse than its counterpart in an older gcc version.
We need this functionality for now. It is mostly used as a safety net in the
Android toolchain if gold does not work. We can disable LTO in that case.
Hopefully we will fix this can resubmit it for trunk later.
This is tested by running ./buildit and building the Android toolchain.
I would like to apply this to goolge/main only.
2011-06-27 Doug Kwan<dougkwan@google.com>
Google ref 41164-p2
Backport upstream patch under review.
2011-01-19 Nick Clifton<nickc@redhat.com>
Matthias Klose<doko@debian.org>
* configure.ac (gcc_cv_gold_srcdir): New cached variable -
contains the location of the gold sources.
(ORIGINAL_GOLD_FOR_TARGET): New substituted variable - contains
the name of the locally built gold executable.
* configure: Regenerate.
* collect2.c (main): Detect the -use-gold and -use-ld switches
and select the appropriate linker, if found.
If a linker cannot be found and collect2 is executing in
verbose mode then report the search paths examined.
* exec-tool.in: Detect the -use-gold and -use-ld switches and
select the appropriate linker, if found.
Add support for -v switch.
Report problems locating linker executable.
* gcc.c (LINK_COMMAND_SPEC): Translate -fuse-ld=gold into
-use-gold and -fuse-ld=bfd into -use-ld.
* common.opt: Add fuse-ld=gold and fuse-ld=bfd.
* opts.c (comman_handle_option): Ignore -fuse-ld=gold and
-fuse-ld=bfd.
* doc/invoke.texi: Document the new options.