dump_syms: add a -v flag

dump_syms: add a -v flag

dump_syms generates a lot of warnings.
This CL puts logging behind a command line flag

URL=https://android-review.googlesource.com/181558
BUG=b:25460551
BUG=google-breakpad:441
R=mark@chromium.org

Committed: https://chromium.googlesource.com/breakpad/breakpad/+/9e60a27911516aa4c74565ebff133fe421dfb029

[vapier, 2015-11-11 06:45:26]

Description was changed from

==========
dump_syms: add a -v flag

dump_syms generates a lot of warnings.
This CL puts logging behind a command line flag

URL=https://android-review.googlesource.com/181558
BUG=
==========

to

==========
dump_syms: add a -v flag

dump_syms generates a lot of warnings.
This CL puts logging behind a command line flag

URL=https://android-review.googlesource.com/181558
BUG=b:25460551
BUG=google-breakpad:441
==========

[vapier, 2015-11-11 06:45:41]

vapier@chromium.org changed reviewers:
+ mark@chromium.org

[Mark Mentovai, 2015-11-11 15:05:13]

Sure, why not? LGTM.

https://codereview.chromium.org/1437763002/diff/1/src/tools/linux/dump_syms/d...
File src/tools/linux/dump_syms/dump_syms.cc (right):

https://codereview.chromium.org/1437763002/diff/1/src/tools/linux/dump_syms/d...
src/tools/linux/dump_syms/dump_syms.cc:77: FILE* saved_stderr =
fdopen(dup(STDERR_FILENO), "w");
fileno(stderr) since everything else is working with it at the stdio layer.

https://codereview.chromium.org/1437763002/diff/1/src/tools/linux/dump_syms/d...
src/tools/linux/dump_syms/dump_syms.cc:79: freopen("/dev/null", "w", stderr);
<paths.h> _PATH_DEVNULL

[vapier, 2015-11-11 18:52:07]

Committed patchset #2 (id:20001) manually as
9e60a27911516aa4c74565ebff133fe421dfb029 (presubmit successful).