don't use glibc-specific execinfo.h on uclibc builds

don't use glibc-specific execinfo.h on uclibc builds

The execinfo.h header is glibc-specific, as is the backtrace function.
Let's skip them for uclibc builds.

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=262344

[Mostyn Bramley-Moore, 2014-04-07 19:45:13]

@Mark: PTAL...

[Mark Mentovai, 2014-04-07 20:37:12]

https://codereview.chromium.org/226623008/diff/1/base/debug/stack_trace_posix.cc
File base/debug/stack_trace_posix.cc (right):

https://codereview.chromium.org/226623008/diff/1/base/debug/stack_trace_posix...
base/debug/stack_trace_posix.cc:752: PrintBacktraceOutputHandler handler;
Do you want to wrap the implementation of Print and OutputToStream in an #ifdef
too? That will make a very clear assertion that we don’t expect any of this to
work at all with non-glibc++. It might also help strip a little extra dead code
out of non-glibc++ builds.

[Mostyn Bramley-Moore, 2014-04-07 21:00:56]

https://codereview.chromium.org/226623008/diff/1/base/debug/stack_trace_posix.cc
File base/debug/stack_trace_posix.cc (right):

https://codereview.chromium.org/226623008/diff/1/base/debug/stack_trace_posix...
base/debug/stack_trace_posix.cc:752: PrintBacktraceOutputHandler handler;
On 2014/04/07 20:37:12, Mark Mentovai wrote:
> Do you want to wrap the implementation of Print and OutputToStream in an
#ifdef
> too? That will make a very clear assertion that we don’t expect any of this to
> work at all with non-glibc++. It might also help strip a little extra dead
code
> out of non-glibc++ builds.

Done in patchset 2, using !uclibc checks rather than glibc checks (since I don't
want to accidentally break mac or android).

[Mark Mentovai, 2014-04-07 21:04:10]

Nice. LGTM.

[Mostyn Bramley-Moore, 2014-04-07 21:06:37]

The CQ bit was checked by mostynb@opera.com

[commit-bot: I haz the power, 2014-04-07 21:07:14]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/mostynb@opera.com/226623008/20001

[commit-bot: I haz the power, 2014-04-07 21:36:17]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2014-04-07 21:36:17]

Try jobs failed on following builders:
  tryserver.chromium on linux_chromium_clang_dbg

[Mostyn Bramley-Moore, 2014-04-07 22:00:54]

The CQ bit was checked by mostynb@opera.com

[commit-bot: I haz the power, 2014-04-07 22:01:42]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/mostynb@opera.com/226623008/20001

[commit-bot: I haz the power, 2014-04-07 22:18:00]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2014-04-07 22:18:00]

Try jobs failed on following builders:
  tryserver.chromium on linux_chromium_rel

[Mostyn Bramley-Moore, 2014-04-08 07:10:04]

The CQ bit was checked by mostynb@opera.com

[commit-bot: I haz the power, 2014-04-08 07:10:20]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/mostynb@opera.com/226623008/20001

[commit-bot: I haz the power, 2014-04-08 08:27:31]

Change committed as 262344