Is there a particular reason you're using -nostdlib when building your library: g++ -shared -nostdlib /usr/lib/crti.o /mu/dev/gcc/3.3.1/lib/gcc-lib/i686-pc-linux-gnu/3.3.1/crtbeginS.o .libs/lib_func.o .libs/validation_exception.o .libs/exception.o -Wl,--rpath -Wl,/mu/dev/gcc/3.3.1/lib/. -Wl,--rpath -Wl,/mu/dev/gcc/3.3.1/lib/. -L/mu/dev/gcc/3.3.1/lib/gcc-lib/i686-pc-linux-gnu/3.3.1 -L/mu/dev/gcc/3.3.1/lib/gcc-lib/i686-pc-linux-gnu/3.3.1/../../.. /mu/dev/gcc/3.3.1/lib/./libstdc++.so -lm -lc -lgcc_s /mu/dev/gcc/3.3.1/lib/gcc-lib/i686-pc-linux-gnu/3.3.1/crtendS.o /usr/lib/crtn.o -Wl,-soname -Wl,liblixo-0.1.0.so -o .libs/liblixo-0.1.0.so In order for exceptions to be thrown across a library boundary, your library needs to be linked properly. I suspect it's not. Why not just let g++ determine what standard libraries to link to, etc.? You might also try adding the argument --eh-frame-hdr which is needed for setting up stack unwinding. I don't know if it will work the way you're doing things, though... Thanks, Lyle -----Original Message----- From: gcc-help-owner@xxxxxxxxxxx [mailto:gcc-help-owner@xxxxxxxxxxx] On Behalf Of Joao Luis Pinto Sent: Monday, December 06, 2004 1:05 AM To: gcc-help@xxxxxxxxxxx Subject: Re: Exception thrown from multithreaded shared lib not caught in main Hello again, Following my previously presented problem, I have built an example that replicates the problem: http://jpinto.homeip.net/~jpinto/lixo-0.1.0.tar.gz Just run ./configure && make check It builds a shared library with a function that throws an exception, and an executable that calls the library function. Aparently multi-threading is not the issue. The problem is that the exception is never caught in main(), and unhandled() gets called. Tested with g++-3.3.4 and g++-3.4.2 (Debian testing x86). Thank you for your time. João Luis