Table of All GCC Warnings

This table collects all gcc warnings used with C++ not enabled by some other option (e.g. -Wall) and indicates the first gcc version the warning appeared in if it's later than gcc 4.6.

It was generated from the files gcc/{common,c-family/c}.opt in basepoints/gcc-13-1056-gff500e1cf16 commit of gcc source tree using show-gcc-warnings script.

See also the table showing only the warnings not enabled by default or by another option, such as -Wall.

Warning	Version	Enabled by
abbreviated-auto-in-template-arg	16.1	default
abi
abi-tag	4.8
abi=	5.1
address		all
address-of-packed-member	9.1	default
aggregate-return
aggressive-loop-optimizations	4.8	default
aligned-new=	7.1	all
all		all
alloc-size	14.1
alloc-size-larger-than=	7.1	all
alloc-zero	7.1
alloca	7.1
alloca-larger-than=	7.1
arith-conversion	10.1
array-bounds		all
array-bounds=	5.1	all
array-compare	12.1
array-parameter=	11.1	all
attribute-alias	8.1	default
attribute-alias=	9.1	default
attribute-warning	9.1	default
attributes		default
attributes=	12.1
auto-profile	16.1
bidi-chars=	12.1
bool-compare	5.1	all
bool-operation	7.1	all
builtin-declaration-mismatch	7.1	default
builtin-macro-redefined		default
calloc-transposed-args	14.1	extra
cannot-profile	9.1	default
cast-align
cast-align=strict	8.1
cast-function-type	8.1	extra
cast-qual
cast-user-defined	14.1	default
catch-value=	8.1	all
changes-meaning	13.1	default
char-subscripts		all
chkp	5.1	all
class-conversion	9.1	default
class-memaccess	8.1
clobbered		extra
comma-subscript	10.1
comment		all
complain-wrong-lang	13.1	default
conditionally-supported	4.9
conversion
conversion-null		default
coverage-invalid-line-number	12.1	default
coverage-mismatch		default
coverage-too-many-conditions	14.1	default
coverage-too-many-paths	15.1	default
cpp		default
ctad-maybe-unsupported	11.1
ctor-dtor-privacy
dangling-else	7.1	parentheses
dangling-pointer=	12.1	all
dangling-reference	13.1
date-time	4.9
defaulted-function-deleted	15.1	default
delete-incomplete	4.9	default
delete-non-virtual-dtor	4.7	all
deprecated		default
deprecated-copy	9.1
deprecated-copy-dtor	9.1
deprecated-declarations		default
deprecated-enum-enum-conversion	11.1
deprecated-enum-float-conversion	11.1
deprecated-literal-operator	15.1
deprecated-openmp	16.1	default
deprecated-variadic-comma-omission	15.1
disabled-optimization
div-by-zero		default
double-promotion
duplicated-branches	7.1
duplicated-cond	6.1
elaborated-enum-base	14.1	default
empty-body		extra
endif-labels		default
enum-compare		all
enum-conversion	11.1	extra
exceptions	11.1	default
expansion-to-defined	7.1	extra
expose-global-module-tu-local	16.1	default
external-tu-local	16.1	default
extra		extra
extra-semi	8.1
flex-array-member-not-at-end	14.1
float-conversion	4.9	conversion
float-equal
format
format-contains-nul		format=
format-diag	10.1	format=
format-extra-args		format=
format-nonliteral		format=
format-overflow=	7.1	format=
format-security		format=
format-signedness	5.1
format-truncation=	7.1	format=
format-zero-length	4.7	format=
format=	4.8	all
frame-address	6.1	all
frame-larger-than=
free-nonheap-object	4.7	default
global-module	14.1	default
hardened	14.1	default
header-guard	15.1	all
hsa	6.1	default
if-not-aligned	8.1	default
ignored-attributes	6.1	default
ignored-qualifiers		extra
implicit-fallthrough=	7.1	extra
inaccessible-base	10.1	default
infinite-recursion	12.1
inherited-variadic-ctor	4.8	default
init-list-lifetime	9.1	default
init-self		all
inline
int-in-bool-context	7.1	all
int-to-pointer-cast		default
interference-size	12.1	default
invalid-constexpr	13.1
invalid-imported-macros	11.1
invalid-memory-model	4.7	default
invalid-offsetof		default
invalid-pch
keyword-macro	16.1
larger-than=
leading-whitespace=	15.1
literal-suffix	4.8	default
logical-not-parentheses	5.1	all
logical-op	6.1
long-long
lto-type-mismatch	6.1	default
main		all pedantic
maybe-musttail-local-addr	15.1	extra
maybe-uninitialized	4.7	uninitialized
memset-elt-size	7.1	all
memset-transposed-args	5.1	all
misleading-indentation	6.1	all
mismatched-dealloc	11.1	all
mismatched-new-delete	11.1	all
mismatched-tags	10.1
missing-attributes	8.1	all
missing-braces		all
missing-declarations
missing-field-initializers		extra
missing-format-attribute
missing-include-dirs
missing-noreturn
missing-profile	9.1	default
missing-requires	12.1	default
missing-template-keyword	12.1	default
mudflap		default
multichar
multiple-inheritance	6.1
multistatement-macros	8.1	all
musttail-local-addr	15.1	default
namespaces	6.1
narrowing	4.7	all
noexcept
noexcept-type	7.1
non-c-typedef-for-linkage	16.1	default
non-template-friend		default
non-virtual-dtor
nonnull	4.7	format= all
nonnull-compare	6.1	all
normalized=
nrvo	14.2
null-dereference	6.1
odr	5.1	default
old-style-cast
openacc-parallelism	12.1
openmp	14.1	default
openmp-simd	4.9	all
overflow		default
overlength-strings		pedantic
overloaded-virtual
overloaded-virtual=	13.1	all
packed
packed-bitfield-compat
packed-not-aligned	8.1	all
padded
parentheses		all
pedantic	4.8	pedantic
pessimizing-move	9.1
placement-new=	6.1
pmf-conversions		default
pointer-arith		pedantic
pointer-compare	7.1	default
pragma-once-outside-header	15.1	default
pragmas		default
prio-ctor-dtor	9.1	default
psabi	15.1	default
range-loop-construct	11.1	all
redundant-decls
redundant-move	9.1	extra
redundant-tags	10.1
register	7.1
reorder		all
restrict	7.1
return-local-addr	4.8	default
return-type		all
scalar-storage-order	6.1	default
self-move	13.1
sequence-point		all
sfinae-incomplete=	16.1	default
shadow
shadow=compatible-local	7.1	shadow=local
shadow=local	7.1	shadow
shift-count-negative	5.1	default
shift-count-overflow	5.1	default
shift-negative-value	6.1
shift-overflow=	6.1
sign-compare		extra
sign-conversion		conversion
sign-promo
sized-deallocation	5.1	extra
sizeof-array-argument	5.1	default
sizeof-array-div	11.1	all
sizeof-pointer-div	8.1	all
sizeof-pointer-memaccess	5.1	all
stack-protector
stack-usage=	4.7
strict-aliasing
strict-aliasing=		all
strict-flex-arrays	13.1
strict-null-sentinel
strict-overflow
strict-overflow=		all
string-compare	10.1
stringop-overflow=	7.1
stringop-overread	11.1	default
stringop-truncation	8.1
subobject-linkage	6.1	default
suggest-attribute=cold	8.1
suggest-attribute=const
suggest-attribute=format	4.8
suggest-attribute=malloc	8.1
suggest-attribute=noreturn
suggest-attribute=pure
suggest-final-methods	5.1
suggest-final-types	5.1
suggest-override	5.1
switch		all
switch-bool	5.1	default
switch-default
switch-enum
switch-outside-range	10.1	default
switch-unreachable	7.1	default
sync-nand		default
synth
system-headers
tautological-compare	6.1	all
template-body	15.1	default
template-id-cdtor	14.1
template-names-tu-local	15.1	extra
templates	6.1
terminate	6.1	default
trailing-whitespace=	15.1
trampolines
trigraphs		all
trivial-auto-var-init	12.1
tsan	11.1	default
type-limits		extra
undef
unicode	13.1	default
uninitialized		extra
unknown-pragmas		all
unreachable-code
unsafe-loop-optimizations
unused		all
unused-but-set-parameter		unused && extra
unused-but-set-parameter=	16.1	unused && extra
unused-but-set-variable		unused
unused-but-set-variable=	16.1	unused
unused-const-variable=	6.1	unused-variable
unused-function		unused
unused-label		unused
unused-local-typedefs	4.7	unused
unused-macros
unused-parameter		unused && extra
unused-result		default
unused-value		unused
unused-variable		unused
use-after-free	12.1
use-after-free=	12.1
useless-cast	4.8
varargs	4.8	default
variadic-macros		default
vector-operation-performance	4.7
vexing-parse	11.1	default
virtual-inheritance	6.1
virtual-move-assign	4.8	default
vla
vla-larger-than=	7.1
vla-parameter	11.1	all
volatile	10.1
volatile-register-var		all
write-strings
xor-used-as-pow	13.1	default
zero-as-null-pointer-constant	4.7
zero-length-bounds	10.1	all