Do not redefine F() if it's already defined

This removes a Warning when compiling KBox tests because I already define F to be a no-op in other headers. I think checking whether F() is defined before re-defining it is the proper thing to do here.
sarfata · Jul 2, 2017 · b289fe7 · b289fe7
1 parent 5b2876a
commit b289fe7
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/N2kDef.h b/N2kDef.h
@@ -58,7 +58,9 @@ extern uint32_t millis();
 class __FlashStringHelper;
 #define F(str) (reinterpret_cast<const __FlashStringHelper*>(PSTR(str)))
 #else
+#ifndef F
 #define F(str) str
 #endif
+#endif
 
 #endif