Wconversion
C ObjC C++ ObjC++ Var(warn_conversion)
-Warn about possibly confusing type conversions
+Warn for implicit type conversions that may change a value
Wctor-dtor-privacy
C++ ObjC++ Var(warn_ctor_dtor_privacy)
C ObjC Var(warn_traditional)
Warn about features not present in traditional C
+Wtraditional-conversion
+C ObjC Var(warn_traditional_conversion)
+Warn of prototypes causing type conversions different from what would happen in the absence of prototype
+
Wtrigraphs
C ObjC C++ ObjC++
Warn if trigraphs are encountered that might affect the meaning of the program
fexternal-templates
C++ ObjC++
-ffixed-form
-C ObjC
-
-ffixed-line-length-none
-C ObjC
-
-ffixed-line-length-
-C ObjC Joined
-
ffor-scope
C++ ObjC++
Scope of for-init-statement variables is local to the loop