C warnings by gcc version

	A	B	C	D	E	F	G	H	I	J	K	M	N	O
1		4.3	4.4	4.5	4.6	4.7	4.8	4.9	5	6	7	Kbuild	allmodconfig	comment

2	-Wpragmas	default	default	default	default	default	default	default	default	default	default	default
3	--all-warnings	unknown	unknown	unknown	unset	unset	unset	unset	unset	unset	unset	unset
4	--extra-warnings	unknown	unknown	unknown	unset	unset	unset	unset	unset	unset	unset	unset
5	-W	unknown	unknown	Wextra	unset	unset	unset	unset	unset	unset	unset	unset
6	-Waddress	Wall	Wall	Wall	Wall	Wall	Wall	Wall	Wall	Wall	Wall	default
7	-Waggregate-return	disabled	disabled	disabled	disabled	disabled	disabled	disabled	disabled	disabled	disabled	W=2	1528	harmful
8	-Waggressive-loop-optimizations	unknown	unknown	unknown	unknown	unknown	default	default	default	default	default	default
9	-Wall	unset	unset	unset	unset	unset	unset	unset	unset	unset	unset	unset
10	-Walloca	unknown	unknown	unknown	unknown	unknown	unknown	unknown	unknown	unknown	disabled	disabled		good
11	-Walloca-larger-than	unknown	unknown	unknown	unknown	unknown	unknown	unknown	unknown	unknown	default: 0	default: 0
12	-Walloc-size-larger-than	unknown	unknown	unknown	unknown	unknown	unknown	unknown	unknown	unknown	unset	unset
13	-Walloc-zero	unknown	unknown	unknown	unknown	unknown	unknown	unknown	unknown	unknown	disabled	disabled		requires annotation
14	-Warray-bounds	Wall	Wall	Wall	Wall	Wall	Wall	Wall	Wall: 1	Wall: 1	Wall: 1	default: 1
15	-Wattributes	default	default	default	default	default	default	default	default	default	default	default	23484
16	-Wbad-function-cast	disabled	disabled	disabled	disabled	disabled	disabled	disabled	disabled	disabled	disabled	W=3	583
17	-Wbool-compare	unknown	unknown	unknown	unknown	unknown	unknown	unknown	Wall	Wall	Wall	default
18	-Wbool-operation	unknown	unknown	unknown	unknown	unknown	unknown	unknown	unknown	unknown	Wall	default	5	good
19	-Wbuiltin-declaration-mismatch	unknown	unknown	unknown	unknown	unknown	unknown	unknown	unknown	unknown	default	default
20	-Wbuiltin-macro-redefined	unknown	unset	unset	unset	unset	unset	unset	default	default	default	default
21	-Wc90-c99-compat	unknown	unknown	unknown	unknown	unknown	unknown	unknown	default	default	default	default
22	-Wc99-c11-compat	unknown	unknown	unknown	unknown	unknown	unknown	unknown	default	default	default	default
23	-Wcast-align	disabled	disabled	disabled	disabled	disabled	disabled	disabled	disabled	disabled	disabled	W=2	10320
24	-Wcast-qual	disabled	disabled	disabled	disabled	disabled	disabled	disabled	disabled	disabled	disabled	W=3	3490
25	-Wc++-compat	disabled	disabled	disabled	disabled	disabled	disabled	disabled	disabled	disabled	disabled	disabled	261157	harmful
26	-Wchar-subscripts	Wall	Wall	Wall	Wall	Wall	Wall	Wall	Wall	Wall	Wall	default
27	-Wchkp	unknown	unknown	unknown	unknown	unknown	unknown	unknown	disabled	Wall	Wall	default
28	-Wclobbered	default	default	default	default	default	Wextra	Wextra	Wextra	Wextra	Wextra	W=1
29	-Wcomment	unset	unset	unset	unset	unset	unset	unset	Wall	Wall	Wall	default
30	-Wcomments	unset	unset	unset	unset	unset	unset	unset	unset	unset	unset	unset
31	-Wconversion	disabled	disabled	disabled	disabled	disabled	disabled	disabled	disabled	disabled	disabled	W=3	73006	useless
32	-Wcoverage-mismatch	disabled	disabled	disabled	default	default	default	default	default	default	default	default
33	-Wcpp	unknown	unknown	unknown	default	default	default	default	default	default	default	default
34	-Wdangling-else	unknown	unknown	unknown	unknown	unknown	unknown	unknown	unknown	unknown	Wall	default
35	-Wdate-time	unknown	unknown	unknown	unknown	unknown	unknown	disabled	disabled	disabled	disabled	default
36	-Wdeclaration-after-statement	disabled	disabled	disabled	disabled	disabled	disabled	disabled	default	default	default	default
37	-Wdeprecated	default	default	default	default	default	default	default	default	default	default	default
38	-Wdeprecated-declarations	default	default	default	default	default	default	default	default	default	default	default
39	-Wdesignated-init	unknown	unknown	unknown	unknown	unknown	unknown	unknown	default	default	default	default
40	-Wdisabled-optimization	disabled	disabled	disabled	disabled	disabled	disabled	disabled	disabled	disabled	disabled	disabled		harmless
41	-Wdiscarded-array-qualifiers	unknown	unknown	unknown	unknown	unknown	unknown	unknown	default	default	default	default
42	-Wdiscarded-qualifiers	unknown	unknown	unknown	unknown	unknown	unknown	unknown	default	default	default	default	44401
43	-Wdiv-by-zero	default	default	default	default	default	default	default	default	default	default	default
44	-Wdouble-promotion	unknown	unknown	unknown	disabled	disabled	disabled	disabled	disabled	disabled	disabled	disabled	24	harmless
45	-Wduplicated-cond	unknown	unknown	unknown	unknown	unknown	unknown	unknown	unknown	disabled	disabled	disabled	37	harmless
46	-Wduplicate-decl-specifier	unknown	unknown	unknown	unknown	unknown	unknown	unknown	unknown	unknown	Wall	default	6
47	-Wempty-body	default	default	default	default	default	Wextra	Wextra	Wextra	Wextra	Wextra	W=1	105
48	-Wendif-labels	unset	unset	unset	unset	unset	unset	unset	default	default	default	default
49	-Wenum-compare	unknown	default	default	default	default	default	default	default	default	default	default
50	-Werror-implicit-function-declaration	unset	unset	unset	unset	unset	unset	unset	unset	unset	unset	unset
51	-Wexpansion-to-defined	unknown	unknown	unknown	unknown	unknown	unknown	unknown	unknown	unknown	Wextra	W=1	13
52	-Wextra	unset	unset	Wextra	Wextra	Wextra	Wextra	Wextra	Wextra	Wextra	Wextra	W=1
53	-Wfloat-conversion	unknown	unknown	unknown	unknown	unknown	unknown	unknown	unknown	disabled	disabled	disabled	230	harmless
54	-Wfloat-equal	disabled	disabled	disabled	disabled	disabled	disabled	disabled	disabled	disabled	disabled	disabled		harmless
55	-Wformat	unset	unset	unset	unset	unset	Wall: 1	Wall: 1	Wall: 1	Wall: 1	Wall: 1	default: 1
56	-Wformat-contains-nul	Wall	Wall	Wall	Wall	Wall	Wall	Wall	Wall	Wall	Wall	default
57	-Wformat-extra-args	Wall	Wall	Wall	Wall	Wall	Wall	Wall	Wall	Wall	Wall	default
58	-Wformat-nonliteral	disabled	disabled	disabled	disabled	disabled	disabled	disabled	disabled	disabled	disabled	disabled	485
59	-Wformat-security	disabled	disabled	disabled	disabled	disabled	disabled	disabled	disabled	disabled	disabled	disabled	118
60	-Wformat-signedness	unknown	unknown	unknown	unknown	unknown	unknown	unknown	disabled	disabled	disabled	disabled
61	-Wformat-y2k	disabled	disabled	disabled	disabled	disabled	disabled	disabled	disabled	disabled	disabled	disabled
62	-Wformat-zero-length	Wall	Wall	Wall	Wall	Wall	Wall	Wall	Wall	Wall	Wall	default
63	-Wframe-address	unknown	unknown	unknown	unknown	unknown	unknown	unknown	unknown	Wall	Wall	disabled		harmless
64	-Wframe-larger-than	unknown	unknown	unknown	unknown	unknown	unknown	unknown	unknown	unset	unset	unset
65	-Wfree-nonheap-object	unknown	unknown	unknown	unknown	default	default	default	default	default	default	default
66	-Whsa	unknown	unknown	unknown	unknown	unknown	unknown	unknown	unknown	default	default	default
67	-Wignored-attributes	unknown	unknown	unknown	unknown	unknown	unknown	unknown	unknown	default	default	default
68	-Wignored-qualifiers	default	default	default	default	default	Wextra	Wextra	Wextra	Wextra	Wextra	W=1	4	good
69	-Wimplicit	unset	unset	unset	default	default	Wall	Wall	Wall	Wall	Wall	default
70	-Wimplicit-fallthrough	unknown	unknown	unknown	unknown	unknown	unknown	unknown	unknown	unknown	Wextra: 3	W=1: 3
71	-Wimplicit-function-declaration	default	default	default	default	default	default	default	default	default	default	default
72	-Wimplicit-int	Wall	Wall	Wall	default	default	Wall	Wall	default	default	default	default
73	-Wincompatible-pointer-types	unknown	unknown	unknown	unknown	unknown	unknown	unknown	default	default	default	default
74	-Winit-self	disabled	disabled	disabled	disabled	disabled	disabled	disabled	disabled	disabled	disabled	disabled		harmless (see Wuninitialized)
75	-Winline	disabled	disabled	disabled	disabled	disabled	disabled	disabled	disabled	disabled	disabled	disabled		useless
76	-Wint-conversion	unknown	unknown	unknown	unknown	unknown	unknown	unknown	default	default	default	default
77	-Wint-in-bool-context	unknown	unknown	unknown	unknown	unknown	unknown	unknown	unknown	unknown	Wall	default	33	good
78	-Wint-to-pointer-cast	default	default	default	default	default	default	default	default	default	default	default
79	-Winvalid-memory-model	unknown	unknown	unknown	unknown	default	default	default	default	default	default	default
80	-Winvalid-pch	unset	unset	unset	unset	unset	unset	unset	disabled	disabled	disabled	disabled		useless
81	-Wjump-misses-init	unknown	unknown	default	default	default	disabled	disabled	disabled	disabled	disabled	disabled	15	good
82	-Wlarger-than-1024	unknown	unknown	unknown	unknown	unknown	unknown	unknown	unknown	unknown	unknown	unknown
83	-Wlarger-than	unknown	unset	unset	unset	unset	unset	unset	unset	unset	unset	unset
84	-Wlogical-not-parentheses	unknown	unknown	unknown	unknown	unknown	unknown	unknown	Wall	Wall	Wall	default
85	-Wlogical-op	disabled	disabled	disabled	disabled	disabled	disabled	disabled	disabled	disabled	disabled	W=2	15	good
86	-Wlong-long	default	default	default	default	default	default	default	default	default	default	default	30418	harmful
87	-Wlto-type-mismatch	unknown	unknown	unknown	unknown	unknown	unknown	unknown	unknown	default	default	default
88	-Wmain	unset	default	default	default	default	default	default	default	default	default	default
89	-Wmaybe-uninitialized	unknown	unknown	unknown	unknown	Wall	Wall	Wall	Wall	Wall	Wall	default	35
90	-Wmemset-elt-size	unknown	unknown	unknown	unknown	unknown	unknown	unknown	unknown	unknown	Wall	default
91	-Wmemset-transposed-args	unknown	unknown	unknown	unknown	unknown	unknown	unknown	Wall	Wall	Wall	default
92	-Wmisleading-indentation	unknown	unknown	unknown	unknown	unknown	unknown	unknown	unknown	Wall	Wall	default
93	-Wmissing-braces	Wall	Wall	Wall	Wall	Wall	Wall	Wall	Wall	Wall	Wall	default
94	-Wmissing-declarations	disabled	disabled	disabled	disabled	disabled	disabled	disabled	disabled	disabled	disabled	W=1
95	-Wmissing-field-initializers	default	default	default	default	default	Wextra	Wextra	Wextra	Wextra	Wextra	W=2	21053	useless
96	-Wmissing-format-attribute	disabled	disabled	disabled	disabled	disabled	unknown	unknown	unknown	unset	unset	unset
97	-Wmissing-include-dirs	unset	unset	unset	unset	unset	unset	unset	disabled	disabled	disabled	W=1	2	good
98	-Wmissing-noreturn	disabled	disabled	disabled	disabled	disabled	unknown	unknown	unknown	unset	unset	unset
99	-Wmissing-parameter-type	default	default	default	default	default	Wextra	Wextra	Wextra	Wextra	Wextra	W=1
100	-Wmissing-prototypes	disabled	disabled	disabled	disabled	disabled	disabled	disabled	disabled	disabled	disabled	W=1	1668	good (mostly xfs false positives)