diff --git a/include/macros.h b/include/macros.h
index a1860f1..6c04166 100644
--- a/include/macros.h
+++ b/include/macros.h
@@ -75,6 +75,7 @@
 #define IGNORE(x) ((void)(x))
 _mixin void _drain_val(void* x, ...) { IGNORE(x); }
 #define _drain(...) _drain_val(NULL, __VA_ARGS__)
+#define IGNORE_ALL(...) _drain(__VA_ARGS__)
 
 // Allocation macros
 
@@ -152,6 +153,8 @@ static_assert_eq(bswap(bswap(128lu)), 128, "bswap128 (lu) failed (3)");
 
 #define FATAL(msg, ...) (TRACEx("FATAL",   msg, ## __VA_ARGS__), abort())
 
+#define TODO(x) FATAL("function %s() is unimplemented: " x, __func__)
+
 //  Debug testing
 
 #define TEST_OK		1
diff --git a/src/tests/version.c b/src/tests/version.c
index de1528c..01e9e79 100644
--- a/src/tests/version.c
+++ b/src/tests/version.c
@@ -20,6 +20,9 @@ DEFTEST(version_str)
 	TEST_ASSERT_EQ(v_ctosn(vers, sz+1, verstr), sz);
 
 	
+	//XXX: It appears we need to bswap the raw versions to compare them ordinally (to b-endian).
+	const u32 vraw2 = bswap(VERSION(1,0,1,0));
+	TEST_ASSERT( vraw2 >= bswap(VERSION(1,0,0,0)) && vraw2 > bswap(VERSION(2,0,0,0)) );
 
 	char* verstr_h;
 	INFO("Version: 0x%x, raw: 0x%x", vers.raw, vraw);
diff --git a/src/version.c b/src/version.c
index 28dea88..64e3d43 100644
--- a/src/version.c
+++ b/src/version.c
@@ -43,3 +43,8 @@ char* v_ctos(version_t ver)
 	return buf;
 }
 
+int v_range(version_t version, version_t r1, version_t r2)
+{
+	IGNORE_ALL(version, r1, r2);
+	TODO("if we need this, we'll try to implement it in a way that doesn't rely on bswap'd raws (see tests to see bswap'd raws do infact work (big endian comparisons))");
+}