Hi Gabriel,
it defines fancy_abort. Not wrapping system.h in extern C results in undefined symbol: _Z11fancy_abortPKciS0_ when loading the plugin.If you want fancy_abort to have a C language specification, that is what you should declare as such.
my code isn't using fancy_abort directly, it is including GCC headers that use gcc_assert (which turns into fancy_abort). Ciao, Duncan.