add rp6502 target

libsrc/rp6502/gettimespec.c

@@ -0,0 +1,22 @@
+/*
+ * Copyright (c) 2023 Rumbledethumps
+ *
+ * SPDX-License-Identifier: Zlib
+ * SPDX-License-Identifier: BSD-3-Clause
+ * SPDX-License-Identifier: Unlicense
+ */
+
+#include <rp6502.h>
+#include <time.h>
+
+int __clock_gettimespec(struct timespec *ts, unsigned char op)
+/* Internal method shared by clock_getres and clock_gettime. */
+{
+    int ax = ria_call_int_errno(op);
+    if (ax >= 0)
+    {
+        ts->tv_sec = ria_pop_long();
+        ts->tv_nsec = ria_pop_long();
+    }
+    return ax;
+}