world-broken: Add libunwind for musl/arm

gcc and libunwind race and when libunwind wins
results are build fails for gcc as described
this is only seen on musl/arm since on musl
/usr/include is search before gcc fixed headers
and unwind.h is in fixed headers. So it works
ok on glibc but not on musl due to reversed search
order.

(From OE-Core rev: 2e9a88a21d21f2f71769899888fbbc994bc708f0)

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 7 insertions, 0 deletions

diff --git a/meta/conf/distro/include/world-broken.inc b/meta/conf/distro/include/world-broken.inc
index a5f6371d31..d4bdddfcfe 100644
--- a/meta/conf/distro/include/world-broken.inc
+++ b/meta/conf/distro/include/world-broken.inc
@@ -47,3 +47,10 @@ EXCLUDE_FROM_WORLD_pn-perf_libc-musl = "1"
 
 # error: 'RTLD_NEXT' was not declared in this scope
 EXCLUDE_FROM_WORLD_pn-gcc-sanitizers_libc-musl = "1"
+
+# gcc fails to build when libuwind is staged before building gcc since
+# it then finds the unwind.h header from libunwind and not from libgcc
+# and on arm specially they are different since libgcc defines some functions
+# as macros which are functions in libunwind and it fails during linking
+# libbacktrace/backtrace.c:76: undefined reference to `_Unwind_GetIP'
+EXCLUDE_FROM_WORLD_pn-libunwind_libc-musl_arm = "1"