gold/ld: add support for poisoned system directories
This is based on the old CodeSourcery patch written by Joseph Myers to add
support to the link for detecting & rejecting bad -L paths when using a
cross-compiler. The differences here:
* The command line flags are always available.
* We can turn on & off the warning via the command line.
* The configure option controls the default warning behavior.
* Add support for gold.
It is not currently upstream, nor has it been submitted at all. There are
no plans to do so currently either.
BUG=chromium:488360
TEST=`cbuildbot chromiumos-sdk` passes # tests arm/amd64/mipsel/x86
TEST=`cbuildbot panther_moblab-full whirlwind-release` pass
TEST=`cbuildbot {x32,arm64}-generic-full` has no new failures
TEST=x86_64-cros-linux-gnu-ld throws warnings when using -L/lib (gold & bfd)
Change-Id: I887253ff1977a8a8d6ffd97b20b8c38e6852c0cc
Reviewed-on: https://chromium-review.googlesource.com/272083
Reviewed-by: Han Shen <[email protected]>
Commit-Queue: Mike Frysinger <[email protected]>
Tested-by: Mike Frysinger <[email protected]>
11 files changed
