Make uClibc vfork() use kernels vfork() instead of fork().

libc/sysdeps/linux/powerpc/Makefile

@@ -25,10 +25,10 @@ SCRT_OBJ = $(patsubst %,S%, $(CRT_OBJ))
 CTOR_TARGETS=$(TOPDIR)lib/crti.o $(TOPDIR)lib/crtn.o
 
 SSRC=__longjmp.S setjmp.S bsd-setjmp.S bsd-_setjmp.S brk.S \
-	clone.S __uClibc_syscall.S syscall.S
+	clone.S __uClibc_syscall.S syscall.S vfork.S
 SOBJS=$(patsubst %.S,%.o, $(SSRC))
 
-CSRC=mmap.c vfork.c __syscall_error.c pread_write.c ioctl.c
+CSRC=mmap.c __syscall_error.c pread_write.c ioctl.c
 COBJS=$(patsubst %.c,%.o, $(CSRC))
 
 OBJS=$(SOBJS) $(COBJS)

libc/sysdeps/linux/powerpc/vfork.S

@@ -0,0 +1,23 @@
+#include <sys/syscall.h>
+
+#ifndef __NR_vfork
+
+/* No vfork so use fork instead */
+.weak vfork ; vfork = __libc_fork
+
+#else
+
+.text
+.global __vfork
+.type   __vfork,@function
+.type   __syscall_error,@function
+
+__vfork:
+	li	0, __NR_vfork
+	sc
+	bnslr+
+	b	__syscall_error
+.size __vfork,.-__vfork
+
+.weak vfork ; vfork = __vfork
+#endif