diff --git a/include/fp_util/feature_detect.h b/include/fp_util/feature_detect.h
new file mode 100644
index 0000000..514437f
--- /dev/null
+++ b/include/fp_util/feature_detect.h
@@ -0,0 +1,13 @@
+#ifndef FEATURE_DETECT_H
+#define FEATURE_DETECT_H
+
+namespace fp_util {
+
+__attribute__((feature_variable("__VARA__DETECT__"))) void detect() {
+  long foo = 0;
+  asm volatile("" : "+g"(foo) : :);
+  foo++;
+}
+} // namespace fp_util
+
+#endif // FEATURE_DETECT_H