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

fusl/src/ipc/shmget.c

Index: fusl/src/ipc/shmget.c
diff --git a/fusl/src/ipc/shmget.c b/fusl/src/ipc/shmget.c
new file mode 100644
index 0000000000000000000000000000000000000000..b44f9d680a75ad430e12d857d7b9314bc3089fd9
--- /dev/null
+++ b/fusl/src/ipc/shmget.c
@@ -0,0 +1,14 @@
+#include <sys/shm.h>
+#include <stdint.h>
+#include "syscall.h"
+#include "ipc.h"
+
+int shmget(key_t key, size_t size, int flag)
+{
+	if (size > PTRDIFF_MAX) size = SIZE_MAX;
+#ifdef SYS_shmget
+	return syscall(SYS_shmget, key, size, flag);
+#else
+	return syscall(SYS_ipc, IPCOP_shmget, key, size, flag);
+#endif
+}