libstdc++ debug option

[Oleg Smolsky]

On 2013-12-04 17:03, Jonathan Wakely wrote:
> On 5 December 2013 00:22, Oleg Smolsky wrote:
>> Hi all, I have a question about the |--enable-libstdcxx-debug option - do I
>> need to pass it to the configure script in order to use the debugging
>> features?
> No.  That option causes a second set of libstdc++ libraries to be
> built with (by default) CXXFLAGS="-O0 -g" and installed to
> ${libdir}/debug so that you can use LD_LIBRARY_PATH to use those
> unoptimized libs if you want to step through libstdc++ code in GDB, it
> does not affect the availability of any features.
>
> See http://gcc.gnu.org/onlinedocs/libstdc++/manual/debug.html#debug.req
>
Oh, I see. Thank you for the clarification! I already forcefully specify 
the location of libstdc++ via -rpath, so I can easily point to the debug 
variant for our debug builds.

Two more questions, if you don't mind:
   - does the debug build work with _GLIBCXX_DEBUG?
   - would a dynamically linked program work against both the debug build
     of libstdc++ and the normal optimized one? (ie via multiple -rpath
     settings that would fit either dev or production machines)

Oleg.