1 files changed, 7 insertions, 15 deletions
diff --git a/libc/sysdeps/linux/common/vfork.c b/libc/sysdeps/linux/common/vfork.c
index e7c920892..a70ed4a63 100644
--- a/libc/sysdeps/linux/common/vfork.c
+++ b/libc/sysdeps/linux/common/vfork.c
@@ -4,30 +4,22 @@
  * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
  */
 
-#include <unistd.h>
-#include <sys/types.h>
 #include <sys/syscall.h>
 
+#if (defined __NR_vfork || (defined __ARCH_USE_MMU__ && defined __NR_fork)) && (defined __USE_BSD || defined __USE_XOPEN_EXTENDED)
+# include <unistd.h>
 extern __typeof(vfork) __vfork attribute_hidden;
 
-#ifdef __NR_vfork
-
-# define __NR___vfork __NR_vfork
+# ifdef __NR_vfork
+#  define __NR___vfork __NR_vfork
 _syscall0(pid_t, __vfork)
-
-weak_alias(__vfork,vfork)
-libc_hidden_weak(vfork)
-
-#elif defined __ARCH_USE_MMU__ && defined __NR_fork
-
+# else
 /* Trivial implementation for arches that lack vfork */
-
 pid_t __vfork(void)
 {
     return fork();
 }
-
-weak_alias(__vfork,vfork)
+# endif
+strong_alias(__vfork,vfork)
 libc_hidden_weak(vfork)
-
 #endif