Patch RFC: Use internal qsort function in libbacktrace

[Patrick Palka]

On Tue, Mar 4, 2014 at 10:34 PM, Ian Lance Taylor <iant@google.com> wrote:
> The GNU glibc qsort function will call malloc in some cases.  That makes
> it unsuitable for libbacktrace, which is intended to work when called
> from a signal handler.  This patch changes libbacktrace to use an
> internal qsort function.
>
> I'm posting this for comments in case anybody sees anything wrong with
> the implementation.  I'll commit it in a day or two if I don't hear
> anything.

The first line of stest.c mentions "btest.c" instead of "stest.c":

/* btest.c -- Test for libbacktrace library