Add a "fork" of musl as //fusl.

fusl/src/ipc/msgctl.c

Index: fusl/src/ipc/msgctl.c
diff --git a/fusl/src/ipc/msgctl.c b/fusl/src/ipc/msgctl.c
new file mode 100644
index 0000000000000000000000000000000000000000..4372c71939cad44717423282cc6382842ffed1bd
--- /dev/null
+++ b/fusl/src/ipc/msgctl.c
@@ -0,0 +1,12 @@
+#include <sys/msg.h>
+#include "syscall.h"
+#include "ipc.h"
+
+int msgctl(int q, int cmd, struct msqid_ds *buf)
+{
+#ifdef SYS_msgctl
+	return syscall(SYS_msgctl, q, cmd | IPC_64, buf);
+#else
+	return syscall(SYS_ipc, IPCOP_msgctl, q, cmd | IPC_64, 0, buf, 0);
+#endif
+}