Using the GNU Compiler Collection (GCC)

Node: Keyword Index, Previous: Option Index, Up: Top

Keyword Index

! in constraint: Multi-Alternative
# in constraint: Modifiers
#pragma: Pragmas
#pragma implementation: C++ Interface
#pragma implementation, implied: C++ Interface
#pragma interface: C++ Interface
#pragma, reason for not using: Function Attributes
$: Dollar Signs
% in constraint: Modifiers
%include: Spec Files
%include_noerr: Spec Files
%rename: Spec Files
& in constraint: Modifiers
': Incompatibilities
* in constraint: Modifiers
+ in constraint: Modifiers
-lgcc, use with -nodefaultlibs: Link Options
-lgcc, use with -nostdlib: Link Options
-nodefaultlibs and unresolved references: Link Options
-nostdlib and unresolved references: Link Options
.sdata/.sdata2 references (PowerPC): RS/6000 and PowerPC Options
//: C++ Comments
0 in constraint: Simple Constraints
< in constraint: Simple Constraints
<?: Min and Max
= in constraint: Modifiers
> in constraint: Simple Constraints
>?: Min and Max
? in constraint: Multi-Alternative
?: extensions: Conditionals, Lvalues
?: side effect: Conditionals
_ in variables in macros: Typeof
__builtin_apply: Constructing Calls
__builtin_apply_args: Constructing Calls
__builtin_choose_expr: Other Builtins
__builtin_constant_p: Other Builtins
__builtin_expect: Other Builtins
__builtin_frame_address: Return Address
__builtin_huge_val: Other Builtins
__builtin_huge_valf: Other Builtins
__builtin_huge_vall: Other Builtins
__builtin_inf: Other Builtins
__builtin_inff: Other Builtins
__builtin_infl: Other Builtins
__builtin_isgreater: Other Builtins
__builtin_isgreaterequal: Other Builtins
__builtin_isless: Other Builtins
__builtin_islessequal: Other Builtins
__builtin_islessgreater: Other Builtins
__builtin_isunordered: Other Builtins
__builtin_nan: Other Builtins
__builtin_nanf: Other Builtins
__builtin_nanl: Other Builtins
__builtin_nans: Other Builtins
__builtin_nansf: Other Builtins
__builtin_nansl: Other Builtins
__builtin_prefetch: Other Builtins
__builtin_return: Constructing Calls
__builtin_return_address: Return Address
__builtin_types_compatible_p: Other Builtins
__complex__ keyword: Complex
__declspec(dllexport): Function Attributes
__declspec(dllimport): Function Attributes
__extension__: Alternate Keywords
__func__ identifier: Function Names
__FUNCTION__ identifier: Function Names
__imag__ keyword: Complex
__PRETTY_FUNCTION__ identifier: Function Names
__real__ keyword: Complex
__STDC_HOSTED__: Standards
__thread: Thread-Local
_Complex keyword: Complex
_Exit: Other Builtins
_exit: Other Builtins
ABI: Compatibility
abort: Other Builtins
abs: Other Builtins
accessing volatiles: Volatiles
Ada: G++ and GCC
address constraints: Simple Constraints
address of a label: Labels as Values
address_operand: Simple Constraints
alias attribute: Function Attributes
aliasing of parameters: Code Gen Options
aligned attribute: Type Attributes, Variable Attributes
alignment: Alignment
alloca: Other Builtins
alloca vs variable-length arrays: Variable Length
alternate keywords: Alternate Keywords
always_inline function attribute: Function Attributes
AMD x86-64 Options: i386 and x86-64 Options
AMD1: Standards
ANSI C: Standards
ANSI C standard: Standards
ANSI C89: Standards
ANSI support: C Dialect Options
ANSI X3.159-1989: Standards
apostrophes: Incompatibilities
application binary interface: Compatibility
ARC Options: ARC Options
arguments in frame (88k): M88K Options
ARM [Annotated C++ Reference Manual]: Backwards Compatibility
ARM options: ARM Options
arrays of length zero: Zero Length
arrays of variable length: Variable Length
arrays, non-lvalue: Subscripting
asm constraints: Constraints
asm expressions: Extended Asm
assembler instructions: Extended Asm
assembler names for identifiers: Asm Labels
assembler syntax, 88k: M88K Options
assembly code, invalid: Bug Criteria
attribute of types: Type Attributes
attribute of variables: Variable Attributes
attribute syntax: Attribute Syntax
autoincrement/decrement addressing: Simple Constraints
automatic inline for C++ member fns: Inline
AVR Options: AVR Options
Backwards Compatibility: Backwards Compatibility
bcmp: Other Builtins
binary compatibility: Compatibility
bit shift overflow (88k): M88K Options
bound pointer to member function: Bound member functions
bug criteria: Bug Criteria
bugs: Bugs
bugs, known: Trouble
built-in functions: Other Builtins, C Dialect Options
bzero: Other Builtins
C compilation options: Invoking GCC
C intermediate output, nonexistent: G++ and GCC
C language extensions: C Extensions
C language, traditional: C Dialect Options
C standard: Standards
C standards: Standards
c++: Invoking G++
C++: G++ and GCC
C++ comments: C++ Comments
C++ compilation options: Invoking GCC
C++ interface and implementation headers: C++ Interface
C++ language extensions: C++ Extensions
C++ member fns, automatically inline: Inline
C++ misunderstandings: C++ Misunderstandings
C++ options, command line: C++ Dialect Options
C++ pragmas, effect on inlining: C++ Interface
C++ source file suffixes: Invoking G++
C++ static data, declaring and defining: Static Definitions
C89: Standards
C90: Standards
C94: Standards
C95: Standards
C99: Standards
C9X: Standards
C_INCLUDE_PATH: Environment Variables
calling functions through the function vector on the H8/300 processors: Function Attributes
case labels in initializers: Designated Inits
case ranges: Case Ranges
cast to a union: Cast to Union
casts as lvalues: Lvalues
cimag: Other Builtins
cimagf: Other Builtins
cimagl: Other Builtins
cleanup attribute: Variable Attributes
code generation conventions: Code Gen Options
code, mixed with declarations: Mixed Declarations
command options: Invoking GCC
comments, C++ style: C++ Comments
common attribute: Variable Attributes
comparison of signed and unsigned values, warning: Warning Options
compiler bugs, reporting: Bug Reporting
compiler compared to C++ preprocessor: G++ and GCC
compiler options, C++: C++ Dialect Options
compiler options, Objective-C: Objective-C Dialect Options
compiler version, specifying: Target Options
COMPILER_PATH: Environment Variables
complex conjugation: Complex
complex numbers: Complex
compound expressions as lvalues: Lvalues
compound literals: Compound Literals
computed gotos: Labels as Values
conditional expressions as lvalues: Lvalues
conditional expressions, extensions: Conditionals
conflicting types: Disappointments
conj: Other Builtins
conjf: Other Builtins
conjl: Other Builtins
const applied to function: Function Attributes
const function attribute: Function Attributes
constants in constraints: Simple Constraints
constraint modifier characters: Modifiers
constraint, matching: Simple Constraints
constraints, asm: Constraints
constraints, machine specific: Machine Constraints
constructing calls: Constructing Calls
constructor expressions: Compound Literals
constructor function attribute: Function Attributes
contributors: Contributors
core dump: Bug Criteria
cos: Other Builtins
cosf: Other Builtins
cosl: Other Builtins
CPATH: Environment Variables
CPLUS_INCLUDE_PATH: Environment Variables
creal: Other Builtins
crealf: Other Builtins
creall: Other Builtins
CRIS Options: CRIS Options
cross compiling: Target Options
D30V Options: D30V Options
Darwin options: Darwin Options
DBX: Interoperation
deallocating variable length arrays: Variable Length
debugging information options: Debugging Options
debugging, 88k OCS: M88K Options
declaration scope: Incompatibilities
declarations inside expressions: Statement Exprs
declarations, mixed with code: Mixed Declarations
declaring attributes of functions: Function Attributes
declaring static data in C++: Static Definitions
defining static data in C++: Static Definitions
dependencies for make as output: Environment Variables
dependencies, make: Preprocessor Options
DEPENDENCIES_OUTPUT: Environment Variables
deprecated attribute: Variable Attributes
deprecated attribute.: Function Attributes
designated initializers: Designated Inits
designator lists: Designated Inits
designators: Designated Inits
destructor function attribute: Function Attributes
diagnostic messages: Language Independent Options
dialect options: C Dialect Options
digits in constraint: Simple Constraints
directory options: Directory Options
divide instruction, 88k: M88K Options
dollar signs in identifier names: Dollar Signs
double-word arithmetic: Long Long
downward funargs: Nested Functions
E in constraint: Simple Constraints
earlyclobber operand: Modifiers
eight bit data on the H8/300 and H8/300H: Function Attributes
empty structures: Empty Structures
environment variables: Environment Variables
error messages: Warnings and Errors
escaped newlines: Escaped Newlines
exclamation point: Multi-Alternative
exit: Other Builtins
exp: Other Builtins
expf: Other Builtins
expl: Other Builtins
explicit register variables: Explicit Reg Vars
expressions containing statements: Statement Exprs
expressions, compound, as lvalues: Lvalues
expressions, conditional, as lvalues: Lvalues
expressions, constructor: Compound Literals
extended asm: Extended Asm
extensible constraints: Simple Constraints
extensions, ?:: Conditionals, Lvalues
extensions, C language: C Extensions
extensions, C++ language: C++ Extensions
external declaration scope: Incompatibilities
F in constraint: Simple Constraints
fabs: Other Builtins
fabsf: Other Builtins
fabsl: Other Builtins
fatal signal: Bug Criteria
FDL, GNU Free Documentation License: GNU Free Documentation License
ffs: Other Builtins
file name suffix: Overall Options
file names: Link Options
flexible array members: Zero Length
float as function value type: Incompatibilities
floating point precision: Disappointments, Optimize Options
format function attribute: Function Attributes
format_arg function attribute: Function Attributes
Fortran: G++ and GCC
forwarding calls: Constructing Calls
fprintf: Other Builtins
fprintf_unlocked: Other Builtins
fputs: Other Builtins
fputs_unlocked: Other Builtins
freestanding environment: Standards
freestanding implementation: Standards
FRV Options: FRV Options
fscanf, and constant strings: Incompatibilities
function addressability on the M32R/D: Function Attributes
function attributes: Function Attributes
function pointers, arithmetic: Pointer Arith
function prototype declarations: Function Prototypes
function without a prologue/epilogue code: Function Attributes
function, size of pointer to: Pointer Arith
functions called via pointer on the RS/6000 and PowerPC: Function Attributes
functions in arbitrary sections: Function Attributes
functions that are passed arguments in registers on the 386: Function Attributes
functions that behave like malloc: Function Attributes
functions that do not pop the argument stack on the 386: Function Attributes
functions that do pop the argument stack on the 386: Function Attributes
functions that have no side effects: Function Attributes
functions that never return: Function Attributes
functions that pop the argument stack on the 386: Function Attributes
functions which do not handle memory bank switching on 68HC11/68HC12: Function Attributes
functions which handle memory bank switching: Function Attributes
functions with non-null pointer arguments: Function Attributes
functions with printf, scanf, strftime or strfmon style arguments: Function Attributes
g in constraint: Simple Constraints
G in constraint: Simple Constraints
g++: Invoking G++
G++: G++ and GCC
GCC: G++ and GCC
GCC command options: Invoking GCC
GCC_EXEC_PREFIX: Environment Variables
generalized lvalues: Lvalues
global offset table: Code Gen Options
global register after longjmp: Global Reg Vars
global register variables: Global Reg Vars
GNAT: G++ and GCC
goto with computed label: Labels as Values
gp-relative references (MIPS): MIPS Options
gprof: Debugging Options
grouping options: Invoking GCC
H in constraint: Simple Constraints
hardware models and configurations, specifying: Submodel Options
hex floats: Hex Floats
hosted environment: C Dialect Options, Standards
hosted implementation: Standards
HPPA Options: HPPA Options
I in constraint: Simple Constraints
i in constraint: Simple Constraints
i386 Options: i386 and x86-64 Options
IA-64 Options: IA-64 Options
IBM RS/6000 and PowerPC Options: RS/6000 and PowerPC Options
IBM RT options: RT Options
identifier names, dollar signs in: Dollar Signs
identifiers, names in assembler code: Asm Labels
identifying source, compiler (88k): M88K Options
imaxabs: Other Builtins
implementation-defined behavior, C language: C Implementation
implied #pragma implementation: C++ Interface
incompatibilities of GCC: Incompatibilities
increment operators: Bug Criteria
index: Other Builtins
indirect calls on ARM: Function Attributes
init_priority attribute: C++ Attributes
initializations in expressions: Compound Literals
initializers with labeled elements: Designated Inits
initializers, non-constant: Initializers
inline automatic for C++ member fns: Inline
inline functions: Inline
inline functions, omission of: Inline
inlining and C++ pragmas: C++ Interface
installation trouble: Trouble
integrating function code: Inline
Intel 386 Options: i386 and x86-64 Options
interface and implementation headers, C++: C++ Interface
intermediate C version, nonexistent: G++ and GCC
interrupt handler functions: Function Attributes
interrupt handler functions on the H8/300 and SH processors: Function Attributes
introduction: Top
invalid assembly code: Bug Criteria
invalid input: Bug Criteria
invoking g++: Invoking G++
ISO 9899: Standards
ISO C: Standards
ISO C standard: Standards
ISO C90: Standards
ISO C94: Standards
ISO C95: Standards
ISO C99: Standards
ISO C9X: Standards
ISO support: C Dialect Options
ISO/IEC 9899: Standards
Java: G++ and GCC
java_interface attribute: C++ Attributes
keywords, alternate: Alternate Keywords
known causes of trouble: Trouble
labeled elements in initializers: Designated Inits
labels as values: Labels as Values
labs: Other Builtins
LANG: Environment Variables
language dialect options: C Dialect Options
large bit shifts (88k): M88K Options
LC_ALL: Environment Variables
LC_CTYPE: Environment Variables
LC_MESSAGES: Environment Variables
length-zero arrays: Zero Length
Libraries: Link Options
LIBRARY_PATH: Environment Variables
link options: Link Options
LL integer suffix: Long Long
llabs: Other Builtins
load address instruction: Simple Constraints
local labels: Local Labels
local variables in macros: Typeof
local variables, specifying registers: Local Reg Vars
locale: Environment Variables
locale definition: Environment Variables
log: Other Builtins
logf: Other Builtins
logl: Other Builtins
long long data types: Long Long
longjmp: Global Reg Vars
longjmp incompatibilities: Incompatibilities
longjmp warnings: Warning Options
lvalues, generalized: Lvalues
m in constraint: Simple Constraints
M32R/D options: M32R/D Options
M680x0 options: M680x0 Options
M68hc1x options: M68hc1x Options
M88k options: M88K Options
machine dependent options: Submodel Options
machine specific constraints: Machine Constraints
macro with variable arguments: Variadic Macros
macros containing asm: Extended Asm
macros, inline alternative: Inline
macros, local labels: Local Labels
macros, local variables in: Typeof
macros, statements in expressions: Statement Exprs
macros, types of arguments: Typeof
make: Preprocessor Options
malloc attribute: Function Attributes
matching constraint: Simple Constraints
maximum operator: Min and Max
MCore options: MCore Options
member fns, automatically inline: Inline
memcmp: Other Builtins
memcpy: Other Builtins
memory references in constraints: Simple Constraints
memset: Other Builtins
message formatting: Language Independent Options
messages, warning: Warning Options
messages, warning and error: Warnings and Errors
middle-operands, omitted: Conditionals
minimum operator: Min and Max
MIPS options: MIPS Options
misunderstandings in C++: C++ Misunderstandings
mixed declarations and code: Mixed Declarations
mktemp, and constant strings: Incompatibilities
MMIX Options: MMIX Options
MN10200 options: MN10200 Options
MN10300 options: MN10300 Options
mode attribute: Variable Attributes
modifiers in constraints: Modifiers
multiple alternative constraints: Multi-Alternative
multiprecision arithmetic: Long Long
n in constraint: Simple Constraints
names used in assembler code: Asm Labels
naming convention, implementation headers: C++ Interface
nested functions: Nested Functions
newlines (escaped): Escaped Newlines
no_instrument_function function attribute: Function Attributes
nocommon attribute: Variable Attributes
noinline function attribute: Function Attributes
non-constant initializers: Initializers
non-static inline function: Inline
nonnull function attribute: Function Attributes
noreturn function attribute: Function Attributes
nothrow function attribute: Function Attributes
NS32K options: NS32K Options
o in constraint: Simple Constraints
OBJC_INCLUDE_PATH: Environment Variables
Objective-C: G++ and GCC
Objective-C options, command line: Objective-C Dialect Options
OCS (88k): M88K Options
offsettable address: Simple Constraints
old-style function definitions: Function Prototypes
omitted middle-operands: Conditionals
open coding: Inline
operand constraints, asm: Constraints
optimize options: Optimize Options
options to control diagnostics formatting: Language Independent Options
options to control warnings: Warning Options
options, C++: C++ Dialect Options
options, code generation: Code Gen Options
options, debugging: Debugging Options
options, dialect: C Dialect Options
options, directory search: Directory Options
options, GCC command: Invoking GCC
options, grouping: Invoking GCC
options, linking: Link Options
options, Objective-C: Objective-C Dialect Options
options, optimization: Optimize Options
options, order: Invoking GCC
options, preprocessor: Preprocessor Options
order of evaluation, side effects: Non-bugs
order of options: Invoking GCC
other register constraints: Simple Constraints
output file option: Overall Options
overloaded virtual fn, warning: C++ Dialect Options
p in constraint: Simple Constraints
packed attribute: Variable Attributes
parameter forward declaration: Variable Length
parameters, aliased: Code Gen Options
PDP-11 Options: PDP-11 Options
PIC: Code Gen Options
pmf: Bound member functions
pointer arguments: Function Attributes
pointer to member function: Bound member functions
portions of temporary objects, pointers to: Temporaries
pragma, extern_prefix: Tru64 Pragmas
pragma, long_calls: ARM Pragmas
pragma, long_calls_off: ARM Pragmas
pragma, longcall: RS/6000 and PowerPC Pragmas
pragma, mark: Darwin Pragmas
pragma, no_long_calls: ARM Pragmas
pragma, options align: Darwin Pragmas
pragma, reason for not using: Function Attributes
pragma, redefine_extname: Solaris Pragmas
pragma, segment: Darwin Pragmas
pragma, unused: Darwin Pragmas
pragmas: Pragmas
pragmas in C++, effect on inlining: C++ Interface
pragmas, interface and implementation: C++ Interface
pragmas, warning of unknown: Warning Options
preprocessing numbers: Incompatibilities
preprocessing tokens: Incompatibilities
preprocessor options: Preprocessor Options
printf: Other Builtins
printf_unlocked: Other Builtins
prof: Debugging Options
promotion of formal parameters: Function Prototypes
pure function attribute: Function Attributes
push address instruction: Simple Constraints
putchar: Other Builtins
puts: Other Builtins
qsort, and global register variables: Global Reg Vars
question mark: Multi-Alternative
r in constraint: Simple Constraints
r0-relative references (88k): M88K Options
ranges in case statements: Case Ranges
read-only strings: Incompatibilities
register positions in frame (88k): M88K Options
register variable after longjmp: Global Reg Vars
registers: Extended Asm
registers for local variables: Local Reg Vars
registers in constraints: Simple Constraints
registers, global allocation: Explicit Reg Vars
registers, global variables in: Global Reg Vars
regparm attribute: Function Attributes
reordering, warning: C++ Dialect Options
reporting bugs: Bugs
rest argument (in macro): Variadic Macros
restricted pointers: Restricted Pointers
restricted references: Restricted Pointers
restricted this pointer: Restricted Pointers
rindex: Other Builtins
RS/6000 and PowerPC Options: RS/6000 and PowerPC Options
RT options: RT Options
RTTI: Vague Linkage
run-time options: Code Gen Options
s in constraint: Simple Constraints
S/390 and zSeries Options: S/390 and zSeries Options
scanf: Other Builtins
scanf, and constant strings: Incompatibilities
scope of a variable length array: Variable Length
scope of declaration: Disappointments
scope of external declarations: Incompatibilities
search path: Directory Options
section function attribute: Function Attributes
section variable attribute: Variable Attributes
sequential consistency on 88k: M88K Options
setjmp: Global Reg Vars
setjmp incompatibilities: Incompatibilities
shared strings: Incompatibilities
shared variable attribute: Variable Attributes
side effect in ?:: Conditionals
side effects, macro argument: Statement Exprs
side effects, order of evaluation: Non-bugs
signal handler functions on the AVR processors: Function Attributes
signed and unsigned values, comparison warning: Warning Options
simple constraints: Simple Constraints
sin: Other Builtins
sinf: Other Builtins
sinl: Other Builtins
sizeof: Typeof
smaller data references: M32R/D Options
smaller data references (88k): M88K Options
smaller data references (MIPS): MIPS Options
smaller data references (PowerPC): RS/6000 and PowerPC Options
snprintf: Other Builtins
SPARC options: SPARC Options
Spec Files: Spec Files
specified registers: Explicit Reg Vars
specifying compiler version and target machine: Target Options
specifying hardware config: Submodel Options
specifying machine version: Target Options
specifying registers for local variables: Local Reg Vars
sprintf: Other Builtins
sqrt: Other Builtins
sqrtf: Other Builtins
sqrtl: Other Builtins
sscanf: Other Builtins
sscanf, and constant strings: Incompatibilities
statements inside expressions: Statement Exprs
static data in C++, declaring and defining: Static Definitions
stdarg.h and RT PC: RT Options
strcat: Other Builtins
strchr: Other Builtins
strcmp: Other Builtins
strcpy: Other Builtins
strcspn: Other Builtins
string constants: Incompatibilities
strlen: Other Builtins
strncat: Other Builtins
strncmp: Other Builtins
strncpy: Other Builtins
strpbrk: Other Builtins
strrchr: Other Builtins
strspn: Other Builtins
strstr: Other Builtins
struct: Unnamed Fields
structure passing (88k): M88K Options
structures: Incompatibilities
structures, constructor expression: Compound Literals
submodel options: Submodel Options
subscripting: Subscripting
subscripting and function values: Subscripting
suffixes for C++ source: Invoking G++
SUNPRO_DEPENDENCIES: Environment Variables
suppressing warnings: Warning Options
surprises in C++: C++ Misunderstandings
SVr4: M88K Options
syntax checking: Warning Options
synthesized methods, warning: C++ Dialect Options
system headers, warnings from: Warning Options
target machine, specifying: Target Options
target options: Target Options
TC1: Standards
TC2: Standards
Technical Corrigenda: Standards
Technical Corrigendum 1: Standards
Technical Corrigendum 2: Standards
template instantiation: Template Instantiation
temporaries, lifetime of: Temporaries
Thread-Local Storage: Thread-Local
thunks: Nested Functions
tiny data section on the H8/300H: Function Attributes
TLS: Thread-Local
tls_model attribute: Variable Attributes
TMPDIR: Environment Variables
TMS320C3x/C4x Options: TMS320C3x/C4x Options
traditional C language: C Dialect Options
treelang: Standards, G++ and GCC
type alignment: Alignment
type attributes: Type Attributes
type_info: Vague Linkage
typedef names as function parameters: Incompatibilities
typeof: Typeof
ULL integer suffix: Long Long
Ultrix calling convention: Interoperation
undefined behavior: Bug Criteria
undefined function value: Bug Criteria
underscores in variables in macros: Typeof
underscores, avoiding (88k): M88K Options
union: Unnamed Fields
union, casting to a: Cast to Union
unions: Incompatibilities
unknown pragmas, warning: Warning Options
unresolved references and -nodefaultlibs: Link Options
unresolved references and -nostdlib: Link Options
unused attribute.: Function Attributes
used attribute.: Function Attributes
V in constraint: Simple Constraints
V850 Options: V850 Options
vague linkage: Vague Linkage
value after longjmp: Global Reg Vars
variable addressability on the M32R/D: Variable Attributes
variable alignment: Alignment
variable attributes: Variable Attributes
variable number of arguments: Variadic Macros
variable-length array scope: Variable Length
variable-length arrays: Variable Length
variables in specified registers: Explicit Reg Vars
variables, local, in macros: Typeof
variadic macros: Variadic Macros
VAX calling convention: Interoperation
VAX options: VAX Options
visibility attribute: Function Attributes
VLAs: Variable Length
void pointers, arithmetic: Pointer Arith
void, size of pointer to: Pointer Arith
volatile access: Volatiles
volatile applied to function: Function Attributes
volatile read: Volatiles
volatile write: Volatiles
vprintf: Other Builtins
vscanf: Other Builtins
vsnprintf: Other Builtins
vsprintf: Other Builtins
vsscanf: Other Builtins
vtable: Vague Linkage
warning for comparison of signed and unsigned values: Warning Options
warning for overloaded virtual fn: C++ Dialect Options
warning for reordering of member initializers: C++ Dialect Options
warning for synthesized methods: C++ Dialect Options
warning for unknown pragmas: Warning Options
warning messages: Warning Options
warnings from system headers: Warning Options
warnings vs errors: Warnings and Errors
weak attribute: Function Attributes
whitespace: Incompatibilities
X in constraint: Simple Constraints
X3.159-1989: Standards
x86-64 Options: i386 and x86-64 Options
Xstormy16 Options: Xstormy16 Options
Xtensa Options: Xtensa Options
zero division on 88k: M88K Options
zero-length arrays: Zero Length
zero-size structures: Empty Structures