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-rw-r--r--libc/sysdeps/linux/common/vfork.c22
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