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Re: RFC: add some static probes to libstdc++


On Tue, 2 Apr 2013, Jonathan Wakely wrote:

On 15 March 2013 08:55, Jakub Jelinek <jakub@redhat.com> wrote:
On Thu, Feb 28, 2013 at 08:32:02AM -0700, Tom Tromey wrote:
2013-02-27  Tom Tromey  <tromey@redhat.com>

      * libsupc++/unwind-cxx.h: Include sys/sdt.h if detected.
      (PROBE2): New macro.
      * libsupc++/eh_throw.cc (__cxa_throw, __cxa_rethrow): Add probe.
      * libsupc++/eh_catch.cc (__cxa_begin_catch): Add probe.
      * configure.ac: Check for sys/sdt.h.
      * configure, config.h.in: Rebuild.

This is ok.  As we are close to 4.8.0-rc1, I went ahead and committed it for
you.

        Jakub

This change is causing a few problems, it looks as though older
versions of Systemtap headers are incompatible with C++11 due to the
UDL/whitespace issues described at
http://gcc.gnu.org/gcc-4.7/porting_to.html

e.g. http://gcc.gnu.org/ml/gcc-help/2013-04/msg00011.html

Should we update the prerequisites documentation to say that if
Systemtap is installed it needs to be at least version X?

I thought you were going to suggest enhancing the configure test so it fails on old systemtap (detects it as absent).

--
Marc Glisse


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