"Klaus Rudolph" <lts-rudolph@xxxxxx> writes: > I tried to link a pthread application with -static and run into a segfault on x86, same on powerpc. > > I tried gcc 4.4.2 (linux/x86) and 4.0.2 for powerpc-unknown-linux-gnu > > > > For the x86 linux example I got in gdb: > (gdb) bt > #0 0x00000000 in ?? () > #1 0x08094d49 in __cxa_guard_release () This can happen when libstdc++ is configured without __thread support and you statically link against -lpthread. The basic bug is that the libstdc++ configure.ac only uses GCC_CHECK_TLS when configured native. I thought this had been fixed, but perhaps not. There is a note on it here: http://gcc.gnu.org/ml/libstdc++/2008-09/msg00003.html . Assuming you are using a kernel which supports TLS (2.6.0 or later), then one fix is to explicitly use --enable-tls when configuring gcc. Another fix is to use -Wl,--whole-archive -lpthread -Wl,--no-whole-archive when linking. Ian
