it for some C++ compiles. Might as well fix usleep()'s
declaration too.
p4raw-id: //depot/perl@28733
#endif
#if defined(HAS_SYSCALL) && !defined(HAS_SYSCALL_PROTO) && !defined(PERL_MICRO)
-int syscall(int, ...);
+EXTERN_C int syscall(int, ...);
#endif
#if defined(HAS_USLEEP) && !defined(HAS_USLEEP_PROTO) && !defined(PERL_MICRO)
-int usleep(unsigned int);
+EXTERN_C int usleep(unsigned int);
#endif
#ifdef PERL_MICRO /* Last chance to export Perl_my_swap */