libunwind: Link with libucontext on musl

Functions like unw_getcontext in libunwind call getcontext() which are
not part of musl C library like glibc, however there is a supplimental
library providing these functions called libucontext, therefore link
libunwind with a static version of this library to resolve such symbols,
this inturn helps packages needing libunwind, who look for certain
APIs in libunwind during configure e.g. heaptrack

(From OE-Core rev: 824c07d1cf2d1574dfe8f395af37479064782426)

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

2 files changed, 2 insertions, 0 deletions

diff --git a/meta/recipes-support/libunwind/libunwind.inc b/meta/recipes-support/libunwind/libunwind.inc
index 76a1bf6246..17ba151933 100644
--- a/meta/recipes-support/libunwind/libunwind.inc
+++ b/meta/recipes-support/libunwind/libunwind.inc
@@ -4,6 +4,7 @@ HOMEPAGE = "http://www.nongnu.org/libunwind"
 LICENSE = "MIT"
 LIC_FILES_CHKSUM = "file://COPYING;md5=2d80c8ed4062b8339b715f90fa68cc9f"
 DEPENDS += "libatomic-ops"
+DEPENDS_append_libc-musl = " libucontext"
 
 inherit autotools multilib_header
 
diff --git a/meta/recipes-support/libunwind/libunwind_1.5.0.bb b/meta/recipes-support/libunwind/libunwind_1.5.0.bb
index 887a35708e..6392cac5c9 100644
--- a/meta/recipes-support/libunwind/libunwind_1.5.0.bb
+++ b/meta/recipes-support/libunwind/libunwind_1.5.0.bb
@@ -25,3 +25,4 @@ COMPATIBLE_HOST_riscv32 = "null"
 LDFLAGS += "-Wl,-z,relro,-z,now ${@bb.utils.contains('DISTRO_FEATURES', 'ld-is-gold', ' -fuse-ld=bfd ', '', d)}"
 
 SECURITY_LDFLAGS_append_libc-musl = " -lssp_nonshared"
+CACHED_CONFIGUREVARS_append_libc-musl = " LDFLAGS='${LDFLAGS} -lucontext'"