build

-> % rustc foo.rs --lib -Z extra-debug-info

-> % ls
foo.c foo.rs libfoo-102129e09d96658-0.0.so

-> % gcc foo.c -g -L. -lfoo-102129e09d96658-0.0 -o foo

-> % LD_LIBRARY_PATH=. ./foo
[1]    30770 segmentation fault  LD_LIBRARY_PATH=. ./foo

-> % LD_LIBRARY_PATH=. gdb ./foo
GNU gdb (GDB) 7.4.1-debian
Reading symbols from /tmp/foo...done.
(gdb) r
Starting program: /tmp/foo

Program received signal SIGSEGV, Segmentation fault.
0x00007ffff7259ad6 in rt::crate_map::do_iter_crate_map::h6b1c6179b73ad9aU::v0.9$x2dpre () from /usr/lib/rustc/x86_64-unknown-linux-gnu/lib/libstd-6c65cf4b443341b1-0.9-pre.so

(gdb) bt
#0  0x00007ffff7259ad6 in rt::crate_map::do_iter_crate_map::h6b1c6179b73ad9aU::v0.9$x2dpre () from /usr/lib/rustc/x86_64-unknown-linux-gnu/lib/libstd-6c65cf4b443341b1-0.9-pre.so
#1  0x00007ffff72592e1 in rt::crate_map::iter_crate_map::hbc873f29d5cd8e2eab::v0.9$x2dpre () from /usr/lib/rustc/x86_64-unknown-linux-gnu/lib/libstd-6c65cf4b443341b1-0.9-pre.so
#2  0x00007ffff7259024 in rt::logging::update_log_settings::h96b0e2f2fcfa63baG::v0.9$x2dpre () from /usr/lib/rustc/x86_64-unknown-linux-gnu/lib/libstd-6c65cf4b443341b1-0.9-pre.so
#3  0x00007ffff7261186 in rt::init::h37a1594521261df4a1::v0.9$x2dpre () from /usr/lib/rustc/x86_64-unknown-linux-gnu/lib/libstd-6c65cf4b443341b1-0.9-pre.so
#4  0x00007ffff72081c8 in rt::start::h58116eb259fa490aR::v0.9$x2dpre () from /usr/lib/rustc/x86_64-unknown-linux-gnu/lib/libstd-6c65cf4b443341b1-0.9-pre.so
#5  0x00007ffff7bd9b80 in foo::do_stuff () at foo.rs:7
#6  0x00007ffff7bd9af7 in do_stuff () from ./libfoo-102129e09d96658-0.0.so
#7  0x00000000004006dc in main (argc=1, argv=0x7fffffffe7c8) at foo.c:5

foo.c

extern int do_stuff(int argc, char** argv);

int main(int argc, char** argv) {

    do_stuff(argc, argv);

    return 0;

}

foo.rs

#[link(name = "foo", vers = "0.0")];

extern mod std;

#[no_mangle]
pub extern fn do_stuff(argc: int, argv: **u8) -> int {
    std::rt::start(argc, argv, stuff)
}

fn stuff() {
    // stuff
}