gio.lo -MD -MP -MF .deps/sigio.Tpo -c -o sigio.lo sigio.c
sigio.c: In function ‘rb_select_sigio’:
sigio.c:238: error: storage size of ‘si’ isn’t known
sigio.c:238: warning: unused variable ‘si’
make[3]: *** [sigio.lo] Error 1