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

fusl/src/internal/powerpc/syscall.s

Index: fusl/src/internal/powerpc/syscall.s
diff --git a/fusl/src/internal/powerpc/syscall.s b/fusl/src/internal/powerpc/syscall.s
new file mode 100644
index 0000000000000000000000000000000000000000..5b16b8f20cbcde33fc9180291af2a5876130255c
--- /dev/null
+++ b/fusl/src/internal/powerpc/syscall.s
@@ -0,0 +1,19 @@
+	.global __syscall
+	.hidden __syscall
+	.type   __syscall,@function
+__syscall:
+	mr      0, 3                  # Save the system call number
+	mr      3, 4                  # Shift the arguments: arg1
+	mr      4, 5                  # arg2
+	mr      5, 6                  # arg3
+	mr      6, 7                  # arg4
+	mr      7, 8                  # arg5
+	mr      8, 9                  # arg6
+	sc
+	bnslr+ # return if not summary overflow
+	#else error:
+	# return negated value.
+	neg 3, 3
+	blr
+	.end    __syscall
+	.size   __syscall, .-__syscall