libunwind: backtrace APIs are glibc specific

Make backtrace() API's use conditional on glibc
this helps make libunwind compile on musl

(From OE-Core rev: acffe22de65fad2f69c702e4fe94b366883a265b)

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

1 files changed, 45 insertions, 0 deletions

diff --git a/meta/recipes-support/libunwind/libunwind-1.1/0001-backtrace-Use-only-with-glibc-and-uclibc.patch b/meta/recipes-support/libunwind/libunwind-1.1/0001-backtrace-Use-only-with-glibc-and-uclibc.patch
new file mode 100644
index 0000000000..9aed419a12
--- /dev/null
+++ b/meta/recipes-support/libunwind/libunwind-1.1/0001-backtrace-Use-only-with-glibc-and-uclibc.patch
@@ -0,0 +1,45 @@
+From 04437142399662b576bd55a85485c6dcc14d0812 Mon Sep 17 00:00:00 2001
+From: Khem Raj <raj.khem@gmail.com>
+Date: Thu, 31 Dec 2015 06:44:07 +0000
+Subject: [PATCH] backtrace: Use only with glibc and uclibc
+
+backtrace API is glibc specific not linux specific
+so make it behave so.
+
+Signed-off-by: Khem Raj <raj.khem@gmail.com>
+---
+Upstream-Status: Pending
+
+ tests/test-coredump-unwind.c | 4 +++-
+ 1 file changed, 3 insertions(+), 1 deletion(-)
+
+diff --git a/tests/test-coredump-unwind.c b/tests/test-coredump-unwind.c
+index 5254708..8767b42 100644
+--- a/tests/test-coredump-unwind.c
++++ b/tests/test-coredump-unwind.c
+@@ -57,7 +57,9 @@
+ #include <grp.h>
+ 
+ /* For SIGSEGV handler code */
++#ifdef __GLIBC__
+ #include <execinfo.h>
++#endif
+ #include <sys/ucontext.h>
+ 
+ #include <libunwind-coredump.h>
+@@ -238,11 +240,11 @@ void handle_sigsegv(int sig, siginfo_t *info, void *ucontext)
+                        ip);
+ 
+   {
++#ifdef __GLIBC__
+     /* glibc extension */
+     void *array[50];
+     int size;
+     size = backtrace(array, 50);
+-#ifdef __linux__
+     backtrace_symbols_fd(array, size, 2);
+ #endif
+   }
+-- 
+2.6.4
+