+++ /dev/null
---- a/libc/sysdeps/linux/common/prctl.c
-+++ b/libc/sysdeps/linux/common/prctl.c
-@@ -12,6 +12,24 @@
- /* psm: including sys/prctl.h would depend on kernel headers */
-
- #ifdef __NR_prctl
--extern int prctl (int, long, long, long, long);
--_syscall5(int, prctl, int, option, long, arg2, long, arg3, long, arg4, long, arg5)
-+#define __NR___syscall_prctl __NR_prctl
-+static inline _syscall5(int, __syscall_prctl, int, option, long, arg2, long, arg3, long,
-+ arg4, long, arg5);
-+
-+int prctl(int option, ...) {
-+ long arg2 = 0;
-+ long arg3 = 0;
-+ long arg4 = 0;
-+ long arg5 = 0;
-+ va_list ap;
-+
-+ va_start(ap, option);
-+ arg2 = va_arg(ap, long);
-+ arg3 = va_arg(ap, long);
-+ arg4 = va_arg(ap, long);
-+ arg5 = va_arg(ap, long);
-+ va_end(ap);
-+
-+ return __syscall_prctl(option, arg2, arg3, arg4, arg5);
-+}
- #endif
--- /dev/null
+--- a/libc/sysdeps/linux/common/prctl.c
++++ b/libc/sysdeps/linux/common/prctl.c
+@@ -12,6 +12,24 @@
+ /* psm: including sys/prctl.h would depend on kernel headers */
+
+ #ifdef __NR_prctl
+-extern int prctl (int, long, long, long, long);
+-_syscall5(int, prctl, int, option, long, arg2, long, arg3, long, arg4, long, arg5)
++#define __NR___syscall_prctl __NR_prctl
++static inline _syscall5(int, __syscall_prctl, int, option, long, arg2, long, arg3, long,
++ arg4, long, arg5);
++
++int prctl(int option, ...) {
++ long arg2 = 0;
++ long arg3 = 0;
++ long arg4 = 0;
++ long arg5 = 0;
++ va_list ap;
++
++ va_start(ap, option);
++ arg2 = va_arg(ap, long);
++ arg3 = va_arg(ap, long);
++ arg4 = va_arg(ap, long);
++ arg5 = va_arg(ap, long);
++ va_end(ap);
++
++ return __syscall_prctl(option, arg2, arg3, arg4, arg5);
++}
+ #endif