Temporarily added partial posix libraris from Odin because posix support for Linux isn't done in Odin yet

posix/sys_select.odin

@@ -0,0 +1,35 @@
+package posix
+
+import "base:intrinsics"
+
+import "core:c"
+import "core:c/libc"
+
+when ODIN_OS == .Darwin {
+	foreign import lib "system:System.framework"
+} else {
+	foreign import lib "system:c"
+}
+
+// sys/select.h - select types
+
+when ODIN_OS == .NetBSD {
+	LPSELECT :: "__pselect50"
+	LSELECT  :: "__select50"
+} else {
+	LPSELECT :: "pselect"
+	LSELECT  :: "select"
+}
+
+when ODIN_OS == .Darwin || ODIN_OS == .FreeBSD || ODIN_OS == .NetBSD || ODIN_OS == .OpenBSD || ODIN_OS == .Linux {
+
+	suseconds_t :: distinct (c.int32_t when ODIN_OS == .Darwin || ODIN_OS == .NetBSD else c.long)
+
+	timeval :: struct {
+		tv_sec:  libc.time_t,      /* [PSX] seconds */
+		tv_usec: suseconds_t, /* [PSX] microseconds */
+	}
+
+} else {
+	#panic("posix is unimplemented for the current target")
+}