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

fusl/arch/x32/bits/shm.h

+#define SHMLBA 4096
+
+struct shmid_ds
+{
+        struct ipc_perm shm_perm;
+        size_t shm_segsz;
+        time_t shm_atime;
+        time_t shm_dtime;
+        time_t shm_ctime;
+        pid_t shm_cpid;
+        pid_t shm_lpid;
+        unsigned long shm_nattch;
+        unsigned long __pad0;
+        unsigned long long __pad1;
+        unsigned long long __pad2;
+};
+
+struct shminfo {
+        unsigned long shmmax, __pad0, shmmin, __pad1, shmmni, __pad2,
+                      shmseg, __pad3, shmall, __pad4;
+        unsigned long long __unused[4];
+};
+
+struct shm_info {
+        int __used_ids;
+        int __pad_ids;
+        unsigned long shm_tot, __pad0, shm_rss, __pad1, shm_swp, __pad2;
+        unsigned long __swap_attempts, __pad3, __swap_successes, __pad4;
+}
+#ifdef __GNUC__
+__attribute__((__aligned__(8)))
+#endif
+;