[PATCH] gold: add --compress-debug-sections=zstd [PR 29641]

[Cary Coutant]

> >  gold/testsuite/Makefile.am |  5 ++++
>
> @@ -3120,6 +3120,15 @@ gdb_index_test_2_gabi:
> gdb_index_test_cdebug_gabi.o gcctestdir/ld
>         $(CXXLINK) -Wl,--gdb-index $<
>  gdb_index_test_2_gabi.stdout: gdb_index_test_2_gabi
>         $(TEST_READELF) --debug-dump=gdb_index $< > $@
> +check_SCRIPTS += gdb_index_test_2_zstd.sh
> +check_DATA += gdb_index_test_2_zstd.stdout
> +MOSTLYCLEANFILES += gdb_index_test_2_zstd.stdout gdb_index_test_2_zstd
> +gdb_index_test_cdebug_zstd.o: gdb_index_test.cc
> +       $(CXXCOMPILE) -O0 -g -Wa,--compress-debug-sections=zstd -c -o $@ $<
> +gdb_index_test_2_zstd: gdb_index_test_cdebug_zstd.o gcctestdir/ld
> +       $(CXXLINK) -Wl,--gdb-index $<
> +gdb_index_test_2_zstd.stdout: gdb_index_test_2_zstd
> +       $(TEST_READELF) --debug-dump=gdb_index $< > $@
>
> These new tests should be conditioned by HAVE_ZSTD, shouldn't they?
>
> Otherwise, looks good to me.

Oops, this reply is for the other thread. Sorry!

-cary