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

fusl/arch/powerpc/pthread_arch.h

Index: fusl/arch/powerpc/pthread_arch.h
diff --git a/fusl/arch/powerpc/pthread_arch.h b/fusl/arch/powerpc/pthread_arch.h
new file mode 100644
index 0000000000000000000000000000000000000000..7c5c4fadb2116382e4a3a15a8e2a7adbaa95bb06
--- /dev/null
+++ b/fusl/arch/powerpc/pthread_arch.h
@@ -0,0 +1,22 @@
+static inline struct pthread *__pthread_self()
+{
+#ifdef __clang__
+	char *tp;
+	__asm__ __volatile__ ("mr %0, 2" : "=r"(tp) : : );
+#else
+	register char *tp __asm__("r2");
+	__asm__ __volatile__ ("" : "=r" (tp) );
+#endif
+	return (pthread_t)(tp - 0x7000 - sizeof(struct pthread));
+}
+                        
+#define TLS_ABOVE_TP
+#define TP_ADJ(p) ((char *)(p) + sizeof(struct pthread) + 0x7000)
+
+#define DTP_OFFSET 0x8000
+
+// the kernel calls the ip "nip", it's the first saved value after the 32
+// GPRs.
+#define MC_PC gregs[32]
+
+#define CANARY canary_at_end