Warn about possibly nested block comments, and C++ comments spanning more than one physical line
Wcomments
-C ObjC C++ ObjC++ Warning
+C ObjC C++ ObjC++ Warning Alias(Wcomment)
Synonym for -Wcomment
Wconversion
; Documented in common.opt
Werror-implicit-function-declaration
-C ObjC RejectNegative Warning
+C ObjC RejectNegative Warning Alias(Werror=, implicit-function-declaration)
This switch is deprecated; use -Werror=implicit-function-declaration instead
Wfloat-equal
-ftabstop=<number> Distance between tab stops for column reporting
ftemplate-depth-
-C++ ObjC++ Joined RejectNegative UInteger Undocumented
+C++ ObjC++ Joined RejectNegative Undocumented Alias(ftemplate-depth=)
ftemplate-depth=
C++ ObjC++ Joined RejectNegative UInteger
Conform to the ISO 201X C standard draft (experimental and incomplete support)
std=c89
-C ObjC
+C ObjC Alias(std=c90)
Conform to the ISO 1990 C standard
std=c90
Conform to the ISO 1999 C standard
std=c9x
-C ObjC
+C ObjC Alias(std=c99)
Deprecated in favor of -std=c99
std=gnu++98
Conform to the ISO 201X C standard draft with GNU extensions (experimental and incomplete support)
std=gnu89
-C ObjC
+C ObjC Alias(std=gnu90)
Conform to the ISO 1990 C standard with GNU extensions
std=gnu90
Conform to the ISO 1999 C standard with GNU extensions
std=gnu9x
-C ObjC
+C ObjC Alias(std=gnu99)
Deprecated in favor of -std=gnu99
std=iso9899:1990
-C ObjC
+C ObjC Alias(std=c90)
Conform to the ISO 1990 C standard
std=iso9899:199409
Conform to the ISO 1990 C standard as amended in 1994
std=iso9899:1999
-C ObjC
+C ObjC Alias(std=c99)
Conform to the ISO 1999 C standard
std=iso9899:199x
-C ObjC
+C ObjC Alias(std=c99)
Deprecated in favor of -std=iso9899:1999
traditional-cpp