I had this problem when I did a global replace of NSLog with DLog. I foolishly included the
#define DLog(...) NSLog(...
statements, so I ended up with
#define DLog(...) DLog(...
which caused the warnings, and a linker error.
与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…