@André H.: Regarding this NaCl link issue: Code: /home/pierre/lighthouse/src/corelib/io/qfilesystemengine_unix.cpp:655: undefined reference to `getcwd' /home/pierre/native_client/toolchain/linux_x86/bin/../lib/gcc/nacl64/4.4.3/../../../../nacl64/lib/../lib32/libc.a(lib_a-unlinkr.o): In function `_unlink_r': unlinkr.c:(.text+0x1c): undefined reference to `unlink' /home/pierre/native_client/toolchain/linux_x86/bin/../lib/gcc/nacl64/4.4.3/../../../../nacl64/lib/../lib32/libc.a(lib_a-linkr.o): In function `_link_r': This solution solved the same issue for me: http://groups.google.com/group/native-client-discuss/browse_thread/thread/6791a44917dd8ded > ... > Try linking with -lnosys. > ...