diff options
| author | Steven Rostedt (VMware) <rostedt@goodmis.org> | 2018-10-05 12:18:16 -0400 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2018-10-08 14:30:45 -0300 |
| commit | bbbab191c2c474d183e93799d008b412e97f5936 (patch) | |
| tree | 85a14941644c3a9c7f616b29eb52ab9e3eb8d6e6 /tools/lib/traceevent/Build | |
| parent | 8b2f245faa6238e28a1d801e8633515251d1acfc (diff) | |
tools lib traceevent: Separate out tep_strerror() for strerror_r() issues
While working on having PowerTop use libtracevent as a shared object
library, Tzvetomir hit "str_error_r not defined". This was added by commit
c3cec9e68f12d ("tools lib traceevent: Use str_error_r()") because
strerror_r() has two definitions, where one is GNU specific, and the other
is XSI complient. The strerror_r() is in a wrapper str_error_r() to keep the
code from having to worry about which compiler is being used.
The problem is that str_error_r() is external to libtraceevent, and not part
of the library. If it is used as a shared object then the tools using it
will need to define that function. I do not want that function defined in
libtraceevent itself, as it is out of scope for that library.
As there's only a single instance of this call, and its in the traceevent
library's own tep_strerror() function, we can copy what was done in perf,
and create yet another external file that undefs _GNU_SOURCE to use the more
portable version of the function. We don't need to worry about the errors
that strerror_r() returns. If the buffer isn't big enough, we simply
truncate it.
Reported-by: Tzvetomir Stoyanov <tstoyanov@vmware.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Tzvetomir Stoyanov (VMware) <tz.stoyanov@gmail.com>
Cc: linux trace devel <linux-trace-devel@vger.kernel.org>
Link: http://lkml.kernel.org/r/20181005121816.484e654f@gandalf.local.home
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/lib/traceevent/Build')
| -rw-r--r-- | tools/lib/traceevent/Build | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/tools/lib/traceevent/Build b/tools/lib/traceevent/Build index c681d0575d16..0050c145d806 100644 --- a/tools/lib/traceevent/Build +++ b/tools/lib/traceevent/Build @@ -4,6 +4,7 @@ libtraceevent-y += trace-seq.o libtraceevent-y += parse-filter.o libtraceevent-y += parse-utils.o libtraceevent-y += kbuffer-parse.o +libtraceevent-y += tep_strerror.o plugin_jbd2-y += plugin_jbd2.o plugin_hrtimer-y += plugin_hrtimer.o |