Hi, as I can read in the archive of the mailing list - several times an issue related to the invalid opcode poped of. It seams that it is not fixed in the current code. MIPS has several ISAs (instruction set architectures) - the file boost/smart_ptr/detail/sp_counted_base_gcc_mips.hpp uses in its inline assembler ll/sc opcode which was added to MIPS II ISA. If you compile boost for MIPS I ISA (which gcc does by default on all LINUX installations I've seen) you get an assembler error like 'opcode not supported on this processor : mips1 (ll/sc)' What about patching sp_counted_base_gcc_mips.hpp to work even if gcc uses MIPS I ISA (see appended patch - others already suggested)? regards, Oliver -- NEU: FreePhone - kostenlos mobil telefonieren und surfen! Jetzt informieren: http://www.gmx.net/de/go/freephone