Update Makefile

Co-authored-by: Oliver Stöneberg <[email protected]>

Author: sodero

Makefile

@@ -43,9 +43,7 @@ ifdef FILESDIR
     override CPPFLAGS+=-DFILESDIR=\"$(FILESDIR)\"
 endif
 
-ifndef RDYNAMIC
-    RDYNAMIC=-rdynamic
-endif
+RDYNAMIC?=-rdynamic
 
 # Set the CPPCHK_GLIBCXX_DEBUG flag. This flag is not used in release Makefiles.
 # The _GLIBCXX_DEBUG define doesn't work in Cygwin or other Win32 systems.