The only architecture in glibc that uses the generic debug/backtrace.c
is hppa. The debug/tst-backtrace* tests fail for hppa, so in fact the
generic debug/backtrace.c is not functional anywhere. Instead, the
x86_64 version is a reasonably generic version that uses
_Unwind_Backtrace from libgcc to backtrace using unwind info, and is
used by several architectures. This patch adds hppa to the
architectures using it (leaving open the possibility of a subsequent
cleanup for 2.28 of moving the x86_64 version to debug/backtrace.c,
and removing all the frame.h files that are now unused).
Reported by Adhemerval in
<https://sourceware.org/ml/libc-alpha/2018-01/msg00564.html> that this
does fix the backtrace test failures for hppa.
[BZ #22719]
* sysdeps/hppa/backtrace.c: New file.
+2018-01-17 Joseph Myers <joseph@codesourcery.com>
+
+ [BZ #22719]
+ * sysdeps/hppa/backtrace.c: New file.
+
2018-01-17 H.J. Lu <hongjiu.lu@intel.com>
[BZ #22715]
--- /dev/null
+#include <sysdeps/x86_64/backtrace.c>