[OE-core] [RFC PATCH] libunwind: Build with gold to avoid build failures

[Richard Purdie]

The library fails to build with binutils 2.25 and standard ld. This
issue is fixed in gcc 5 with no plans to backport to gcc 4. Easiest
workaround for now is to use gold as the linker for the library
since gold does not have the issue. The bug is x86 only.

Signed-off-by: Richard Purdie <richard.purdie at linuxfoundation.org>

diff --git a/meta/recipes-support/libunwind/libunwind.inc b/meta/recipes-support/libunwind/libunwind.inc
index 2a65631..74afba1 100644
--- a/meta/recipes-support/libunwind/libunwind.inc
+++ b/meta/recipes-support/libunwind/libunwind.inc
@@ -23,6 +23,9 @@ LIBATOMICS_armv5 = "-latomic_ops"
 LIBATOMICS_armv4 = "-latomic_ops"
 LIBATOMICS ?= ""
 
+LDFLAGS_append_x86 = " -fuse-ld=gold"
+LDFLAGS_append_x86-64 = " -fuse-ld=gold"
+
 DEPENDS += "${DEPLIBATOMICS}"
 DEPLIBATOMICS_armv5 = "libatomics-ops"
 DEPLIBATOMICS_armv4 = "libatomics-ops"