Keyword Index
- ! in constraint, see Section 6.38.2 Multiple Alternative Constraints
- # in constraint, see Section 6.38.3 Constraint Modifier Characters
- #pragma, see Section 6.48 Pragmas Accepted by GCC
- #pragma implementation, see Section 7.5 Declarations and Definitions in One Header
- #pragma implementation, implied, see Section 7.5 Declarations and Definitions in One Header
- #pragma interface, see Section 7.5 Declarations and Definitions in One Header
- #pragma, reason for not using, see Section 6.26 Declaring Attributes of Functions
- $, see Section 6.30 Dollar Signs in Identifier Names
- in constraint, see Section 6.38.3 Constraint Modifier Characters
- 45nclude, see Section 4.15 Specifying subprocesses and the switches to pass to them
- 45nclude_noerr, see Section 4.15 Specifying subprocesses and the switches to pass to them
- rename, see Section 4.15 Specifying subprocesses and the switches to pass to them
- & in constraint, see Section 6.38.3 Constraint Modifier Characters
- ', see Section 11.5 Incompatibilities of GCC
- * in constraint, see Section 6.38.3 Constraint Modifier Characters
- + in constraint, see Section 6.38.3 Constraint Modifier Characters
- -lgcc, use with -nodefaultlibs, see Section 4.13 Options for Linking
- -lgcc, use with -nostdlib, see Section 4.13 Options for Linking
- -nodefaultlibs and unresolved references, see Section 4.13 Options for Linking
- -nostdlib and unresolved references, see Section 4.13 Options for Linking
- .sdata/.sdata2 references (PowerPC), see Section 4.17.2 IBM RS/6000 and PowerPC Options
- //, see Section 6.29 C++ Style Comments
- 0 in constraint, see Section 6.38.1 Simple Constraints
- < in constraint, see Section 6.38.1 Simple Constraints
- <?, see Section 7.1 Minimum and Maximum Operators in C++
- = in constraint, see Section 6.38.3 Constraint Modifier Characters
- > in constraint, see Section 6.38.1 Simple Constraints
- >?, see Section 7.1 Minimum and Maximum Operators in C++
- ? in constraint, see Section 6.38.2 Multiple Alternative Constraints
- ?: extensions, see Section 6.8 Conditionals with Omitted Operands
- ?: extensions, see Section 6.7 Generalized Lvalues
- ?: side effect, see Section 6.8 Conditionals with Omitted Operands
- _ in variables in macros, see Section 6.6 Referring to a Type with typeof
- __builtin_apply, see Section 6.5 Constructing Function Calls
- __builtin_apply_args, see Section 6.5 Constructing Function Calls
- __builtin_choose_expr, see Section 6.46 Other built-in functions provided by GCC
- __builtin_clz, see Section 6.46 Other built-in functions provided by GCC
- __builtin_clzl, see Section 6.46 Other built-in functions provided by GCC
- __builtin_clzll, see Section 6.46 Other built-in functions provided by GCC
- __builtin_constant_p, see Section 6.46 Other built-in functions provided by GCC
- __builtin_ctz, see Section 6.46 Other built-in functions provided by GCC
- __builtin_ctzl, see Section 6.46 Other built-in functions provided by GCC
- __builtin_ctzll, see Section 6.46 Other built-in functions provided by GCC
- __builtin_expect, see Section 6.46 Other built-in functions provided by GCC
- __builtin_ffs, see Section 6.46 Other built-in functions provided by GCC
- __builtin_ffsl, see Section 6.46 Other built-in functions provided by GCC
- __builtin_ffsll, see Section 6.46 Other built-in functions provided by GCC
- __builtin_frame_address, see Section 6.44 Getting the Return or Frame Address of a Function
- __builtin_huge_val, see Section 6.46 Other built-in functions provided by GCC
- __builtin_huge_valf, see Section 6.46 Other built-in functions provided by GCC
- __builtin_huge_vall, see Section 6.46 Other built-in functions provided by GCC
- __builtin_inf, see Section 6.46 Other built-in functions provided by GCC
- __builtin_inff, see Section 6.46 Other built-in functions provided by GCC
- __builtin_infl, see Section 6.46 Other built-in functions provided by GCC
- __builtin_isgreater, see Section 6.46 Other built-in functions provided by GCC
- __builtin_isgreaterequal, see Section 6.46 Other built-in functions provided by GCC
- __builtin_isless, see Section 6.46 Other built-in functions provided by GCC
- __builtin_islessequal, see Section 6.46 Other built-in functions provided by GCC
- __builtin_islessgreater, see Section 6.46 Other built-in functions provided by GCC
- __builtin_isunordered, see Section 6.46 Other built-in functions provided by GCC
- __builtin_nan, see Section 6.46 Other built-in functions provided by GCC
- __builtin_nanf, see Section 6.46 Other built-in functions provided by GCC
- __builtin_nanl, see Section 6.46 Other built-in functions provided by GCC
- __builtin_nans, see Section 6.46 Other built-in functions provided by GCC
- __builtin_nansf, see Section 6.46 Other built-in functions provided by GCC
- __builtin_nansl, see Section 6.46 Other built-in functions provided by GCC
- __builtin_parity, see Section 6.46 Other built-in functions provided by GCC
- __builtin_parityl, see Section 6.46 Other built-in functions provided by GCC
- __builtin_parityll, see Section 6.46 Other built-in functions provided by GCC
- __builtin_popcount, see Section 6.46 Other built-in functions provided by GCC
- __builtin_popcountl, see Section 6.46 Other built-in functions provided by GCC
- __builtin_popcountll, see Section 6.46 Other built-in functions provided by GCC
- __builtin_prefetch, see Section 6.46 Other built-in functions provided by GCC
- __builtin_return, see Section 6.5 Constructing Function Calls
- __builtin_return_address, see Section 6.44 Getting the Return or Frame Address of a Function
- __builtin_types_compatible_p, see Section 6.46 Other built-in functions provided by GCC
- __complex__ keyword, see Section 6.10 Complex Numbers
- __extension__, see Section 6.41 Alternate Keywords
- __func__ identifier, see Section 6.43 Function Names as Strings
- __FUNCTION__ identifier, see Section 6.43 Function Names as Strings
- __imag__ keyword, see Section 6.10 Complex Numbers
- __PRETTY_FUNCTION__ identifier, see Section 6.43 Function Names as Strings
- __real__ keyword, see Section 6.10 Complex Numbers
- __STDC_HOSTED__, see Chapter 3 Language Standards Supported by GCC
- __thread, see Section 6.50 Thread-Local Storage
- _Complex keyword, see Section 6.10 Complex Numbers
- _Exit, see Section 6.46 Other built-in functions provided by GCC
- _exit, see Section 6.46 Other built-in functions provided by GCC
A
- ABI, see Chapter 9 Binary Compatibility
- abort, see Section 6.46 Other built-in functions provided by GCC
- abs, see Section 6.46 Other built-in functions provided by GCC
- accessing volatiles, see Section 7.2 When is a Volatile Object Accessed?
- Ada, see Chapter 2 Compile C, C++, Objective-C, Ada, Fortran, Java, or treelang
- address constraints, see Section 6.38.1 Simple Constraints
- address of a label, see Section 6.3 Labels as Values
- address_operand, see Section 6.38.1 Simple Constraints
- alias attribute, see Section 6.26 Declaring Attributes of Functions
- aliasing of parameters, see Section 4.18 Options for Code Generation Conventions
- aligned attribute, see Section 6.33 Specifying Attributes of Variables
- aligned attribute, see Section 6.34 Specifying Attributes of Types
- alignment, see Section 6.32 Inquiring on Alignment of Types or Variables
- alloca, see Section 6.46 Other built-in functions provided by GCC
- alloca vs variable-length arrays, see Section 6.14 Arrays of Variable Length
- alternate keywords, see Section 6.41 Alternate Keywords
- always_inline function attribute, see Section 6.26 Declaring Attributes of Functions
- AMD x86-64 Options, see Section 4.17.3 Intel 386 and AMD x86-64 Options
- AMD1, see Chapter 3 Language Standards Supported by GCC
- ANSI C, see Chapter 3 Language Standards Supported by GCC
- ANSI C standard, see Chapter 3 Language Standards Supported by GCC
- ANSI C89, see Chapter 3 Language Standards Supported by GCC
- ANSI support, see Section 4.4 Options Controlling C Dialect
- ANSI X3.159-1989, see Chapter 3 Language Standards Supported by GCC
- apostrophes, see Section 11.5 Incompatibilities of GCC
- application binary interface, see Chapter 9 Binary Compatibility
- ARM [Annotated C++ Reference Manual], see Section 7.11 Backwards Compatibility
- arrays of length zero, see Section 6.12 Arrays of Length Zero
- arrays of variable length, see Section 6.14 Arrays of Variable Length
- arrays, non-lvalue, see Section 6.18 Non-Lvalue Arrays May Have Subscripts
- asm constraints, see Section 6.38 Constraints for asmOperands
- asm expressions, see Section 6.37 Assembler Instructions with C Expression Operands
- assembler instructions, see Section 6.37 Assembler Instructions with C Expression Operands
- assembler names for identifiers, see Section 6.39 Controlling Names Used in Assembler Code
- assembly code, invalid, see Section 12.1 Have You Found a Bug?
- atan, see Section 6.46 Other built-in functions provided by GCC
- atan2, see Section 6.46 Other built-in functions provided by GCC
- atan2f, see Section 6.46 Other built-in functions provided by GCC
- atan2l, see Section 6.46 Other built-in functions provided by GCC
- atanf, see Section 6.46 Other built-in functions provided by GCC
- atanl, see Section 6.46 Other built-in functions provided by GCC
- attribute of types, see Section 6.34 Specifying Attributes of Types
- attribute of variables, see Section 6.33 Specifying Attributes of Variables
- attribute syntax, see Section 6.27 Attribute Syntax
- autoincrement/decrement addressing, see Section 6.38.1 Simple Constraints
- automatic inline for C++ member fns, see Section 6.36 An Inline Function is As Fast As a Macro
B
- Backwards Compatibility, see Section 7.11 Backwards Compatibility
- base class members, see Section 11.9.2 Name lookup, templates, and accessing members of base classes
- bcmp, see Section 6.46 Other built-in functions provided by GCC
- binary compatibility, see Chapter 9 Binary Compatibility
- bound pointer to member function, see Section 7.7 Extracting the function pointer from a bound pointer to member function
- bug criteria, see Section 12.1 Have You Found a Bug?
- bugs, see Chapter 12 Reporting Bugs
- bugs, known, see Chapter 11 Known Causes of Trouble with GCC
- built-in functions, see Section 4.4 Options Controlling C Dialect
- built-in functions, see Section 6.46 Other built-in functions provided by GCC
- bzero, see Section 6.46 Other built-in functions provided by GCC
C
- C compilation options, see Chapter 4 GCC Command Options
- C intermediate output, nonexistent, see Chapter 2 Compile C, C++, Objective-C, Ada, Fortran, Java, or treelang
- C language extensions, see Chapter 6 Extensions to the C Language Family
- C language, traditional, see Section 4.4 Options Controlling C Dialect
- C standard, see Chapter 3 Language Standards Supported by GCC
- C standards, see Chapter 3 Language Standards Supported by GCC
- C++, see Chapter 2 Compile C, C++, Objective-C, Ada, Fortran, Java, or treelang
- c++, see Section 4.3 Compiling C++ Programs
- C++ comments, see Section 6.29 C++ Style Comments
- C++ compilation options, see Chapter 4 GCC Command Options
- C++ interface and implementation headers, see Section 7.5 Declarations and Definitions in One Header
- C++ language extensions, see Chapter 7 Extensions to the C++ Language
- C++ member fns, automatically inline, see Section 6.36 An Inline Function is As Fast As a Macro
- C++ misunderstandings, see Section 11.9 Common Misunderstandings with GNU C++
- C++ options, command line, see Section 4.5 Options Controlling C++ Dialect
- C++ pragmas, effect on inlining, see Section 7.5 Declarations and Definitions in One Header
- C++ source file suffixes, see Section 4.3 Compiling C++ Programs
- C++ static data, declaring and defining, see Section 11.9.1 Declare andDefine Static Members
- C89, see Chapter 3 Language Standards Supported by GCC
- C90, see Chapter 3 Language Standards Supported by GCC
- C94, see Chapter 3 Language Standards Supported by GCC
- C95, see Chapter 3 Language Standards Supported by GCC
- C99, see Chapter 3 Language Standards Supported by GCC
- C9X, see Chapter 3 Language Standards Supported by GCC
- cabs, see Section 6.46 Other built-in functions provided by GCC
- cabsf, see Section 6.46 Other built-in functions provided by GCC
- cabsl, see Section 6.46 Other built-in functions provided by GCC
- calloc, see Section 6.46 Other built-in functions provided by GCC
- case labels in initializers, see Section 6.22 Designated Initializers
- case ranges, see Section 6.23 Case Ranges
- cast to a union, see Section 6.24 Cast to a Union Type
- casts as lvalues, see Section 6.7 Generalized Lvalues
- ceil, see Section 6.46 Other built-in functions provided by GCC
- ceilf, see Section 6.46 Other built-in functions provided by GCC
- ceill, see Section 6.46 Other built-in functions provided by GCC
- cimag, see Section 6.46 Other built-in functions provided by GCC
- cimagf, see Section 6.46 Other built-in functions provided by GCC
- cimagl, see Section 6.46 Other built-in functions provided by GCC
- cleanup attribute, see Section 6.33 Specifying Attributes of Variables
- code generation conventions, see Section 4.18 Options for Code Generation Conventions
- code, mixed with declarations, see Section 6.25 Mixed Declarations and Code
- command options, see Chapter 4 GCC Command Options
- comments, C++ style, see Section 6.29 C++ Style Comments
- common attribute, see Section 6.33 Specifying Attributes of Variables
- comparison of signed and unsigned values, warning, see Section 4.8 Options to Request or Suppress Warnings
- compiler bugs, reporting, see Section 12.2 How and where to Report Bugs
- compiler compared to C++ preprocessor, see Chapter 2 Compile C, C++, Objective-C, Ada, Fortran, Java, or treelang
- compiler options, C++, see Section 4.5 Options Controlling C++ Dialect
- compiler options, Objective-C, see Section 4.6 Options Controlling Objective-C Dialect
- compiler version, specifying, see Section 4.16 Specifying Target Machine and Compiler Version
- COMPILER_PATH, see Section 4.19 Environment Variables Affecting GCC
- complex conjugation, see Section 6.10 Complex Numbers
- complex numbers, see Section 6.10 Complex Numbers
- compound expressions as lvalues, see Section 6.7 Generalized Lvalues
- compound literals, see Section 6.21 Compound Literals
- computed gotos, see Section 6.3 Labels as Values
- conditional expressions as lvalues, see Section 6.7 Generalized Lvalues
- conditional expressions, extensions, see Section 6.8 Conditionals with Omitted Operands
- conflicting types, see Section 11.8 Disappointments and Misunderstandings
- conj, see Section 6.46 Other built-in functions provided by GCC
- conjf, see Section 6.46 Other built-in functions provided by GCC
- conjl, see Section 6.46 Other built-in functions provided by GCC
- const applied to function, see Section 6.26 Declaring Attributes of Functions
- const function attribute, see Section 6.26 Declaring Attributes of Functions
- constants in constraints, see Section 6.38.1 Simple Constraints
- constraint modifier characters, see Section 6.38.3 Constraint Modifier Characters
- constraint, matching, see Section 6.38.1 Simple Constraints
- constraints, asm, see Section 6.38 Constraints for asmOperands
- constraints, machine specific, see Section 6.38.4 Constraints for Particular Machines
- constructing calls, see Section 6.5 Constructing Function Calls
- constructor expressions, see Section 6.21 Compound Literals
- constructor function attribute, see Section 6.26 Declaring Attributes of Functions
- contributors, see Chapter 19 Contributors to GCC
- core dump, see Section 12.1 Have You Found a Bug?
- cos, see Section 6.46 Other built-in functions provided by GCC
- cosf, see Section 6.46 Other built-in functions provided by GCC
- cosl, see Section 6.46 Other built-in functions provided by GCC
- creal, see Section 6.46 Other built-in functions provided by GCC
- crealf, see Section 6.46 Other built-in functions provided by GCC
- creall, see Section 6.46 Other built-in functions provided by GCC
- cross compiling, see Section 4.16 Specifying Target Machine and Compiler Version
D
- DBX, see Section 11.3 Interoperation
- deallocating variable length arrays, see Section 6.14 Arrays of Variable Length
- debugging information options, see Section 4.9 Options for Debugging Your Program or GCC
- declaration scope, see Section 11.5 Incompatibilities of GCC
- declarations inside expressions, see Section 6.1 Statements and Declarations in Expressions
- declarations, mixed with code, see Section 6.25 Mixed Declarations and Code
- declaring attributes of functions, see Section 6.26 Declaring Attributes of Functions
- declaring static data in C++, see Section 11.9.1 Declare andDefine Static Members
- defining static data in C++, see Section 11.9.1 Declare andDefine Static Members
- dependencies for make as output, see Section 4.19 Environment Variables Affecting GCC
- dependencies, make, see Section 4.11 Options Controlling the Preprocessor
- dependent name lookup, see Section 11.9.2 Name lookup, templates, and accessing members of base classes
- deprecated attribute, see Section 6.33 Specifying Attributes of Variables
- deprecated attribute., see Section 6.26 Declaring Attributes of Functions
- designated initializers, see Section 6.22 Designated Initializers
- designator lists, see Section 6.22 Designated Initializers
- designators, see Section 6.22 Designated Initializers
- destructor function attribute, see Section 6.26 Declaring Attributes of Functions
- diagnostic messages, see Section 4.7 Options to Control Diagnostic Messages Formatting
- dialect options, see Section 4.4 Options Controlling C Dialect
- digits in constraint, see Section 6.38.1 Simple Constraints
- directory options, see Section 4.14 Options for Directory Search
- dollar signs in identifier names, see Section 6.30 Dollar Signs in Identifier Names
- double-word arithmetic, see Section 6.9 Double-Word Integers
- downward funargs, see Section 6.4 Nested Functions
- E in constraint, see Section 6.38.1 Simple Constraints
E
- earlyclobber operand, see Section 6.38.3 Constraint Modifier Characters
- empty structures, see Section 6.13 Structures With No Members
- environment variables, see Section 4.19 Environment Variables Affecting GCC
- error messages, see Section 11.12 Warning Messages and Error Messages
- escaped newlines, see Section 6.16 Slightly Looser Rules for Escaped Newlines
- exclamation point, see Section 6.38.2 Multiple Alternative Constraints
- exit, see Section 6.46 Other built-in functions provided by GCC
- exp, see Section 6.46 Other built-in functions provided by GCC
- expf, see Section 6.46 Other built-in functions provided by GCC
- expl, see Section 6.46 Other built-in functions provided by GCC
- explicit register variables, see Section 6.40 Variables in Specified Registers
- expressions containing statements, see Section 6.1 Statements and Declarations in Expressions
- expressions, compound, as lvalues, see Section 6.7 Generalized Lvalues
- expressions, conditional, as lvalues, see Section 6.7 Generalized Lvalues
- expressions, constructor, see Section 6.21 Compound Literals
- extended asm, see Section 6.37 Assembler Instructions with C Expression Operands
- extensible constraints, see Section 6.38.1 Simple Constraints
- extensions, ?:, see Section 6.8 Conditionals with Omitted Operands
- extensions, ?:, see Section 6.7 Generalized Lvalues
- extensions, C language, see Chapter 6 Extensions to the C Language Family
- extensions, C++ language, see Chapter 7 Extensions to the C++ Language
- external declaration scope, see Section 11.5 Incompatibilities of GCC
- F in constraint, see Section 6.38.1 Simple Constraints
F
- fabs, see Section 6.46 Other built-in functions provided by GCC
- fabsf, see Section 6.46 Other built-in functions provided by GCC
- fabsl, see Section 6.46 Other built-in functions provided by GCC
- fatal signal, see Section 12.1 Have You Found a Bug?
- FDL, GNU Free Documentation License, see Chapter 18 GNU Free Documentation License
- ffs, see Section 6.46 Other built-in functions provided by GCC
- file name suffix, see Section 4.2 Options Controlling the Kind of Output
- file names, see Section 4.13 Options for Linking
- flexible array members, see Section 6.12 Arrays of Length Zero
- float as function value type, see Section 11.5 Incompatibilities of GCC
- floating point precision, see Section 11.8 Disappointments and Misunderstandings
- floating point precision, see Section 4.10 Options That Control Optimization
- floor, see Section 6.46 Other built-in functions provided by GCC
- floorf, see Section 6.46 Other built-in functions provided by GCC
- floorl, see Section 6.46 Other built-in functions provided by GCC
- fmod, see Section 6.46 Other built-in functions provided by GCC
- fmodf, see Section 6.46 Other built-in functions provided by GCC
- fmodl, see Section 6.46 Other built-in functions provided by GCC
- format function attribute, see Section 6.26 Declaring Attributes of Functions
- format_arg function attribute, see Section 6.26 Declaring Attributes of Functions
- Fortran, see Chapter 2 Compile C, C++, Objective-C, Ada, Fortran, Java, or treelang
- forwarding calls, see Section 6.5 Constructing Function Calls
- fprintf, see Section 6.46 Other built-in functions provided by GCC
- fprintf_unlocked, see Section 6.46 Other built-in functions provided by GCC
- fputs, see Section 6.46 Other built-in functions provided by GCC
- fputs_unlocked, see Section 6.46 Other built-in functions provided by GCC
- freestanding environment, see Chapter 3 Language Standards Supported by GCC
- freestanding implementation, see Chapter 3 Language Standards Supported by GCC
- fscanf, and constant strings, see Section 11.5 Incompatibilities of GCC
- function attributes, see Section 6.26 Declaring Attributes of Functions
- function pointers, arithmetic, see Section 6.19 Arithmetic on void- and Function-Pointers
- function prototype declarations, see Section 6.28 Prototypes and Old-Style Function Definitions
- function without a prologue/epilogue code, see Section 6.26 Declaring Attributes of Functions
- function, size of pointer to, see Section 6.19 Arithmetic on void- and Function-Pointers
- functions called via pointer on the RS/6000 and PowerPC, see Section 6.26 Declaring Attributes of Functions
- functions in arbitrary sections, see Section 6.26 Declaring Attributes of Functions
- functions that are passed arguments in registers on the 386, see Section 6.26 Declaring Attributes of Functions
- functions that behave like malloc, see Section 6.26 Declaring Attributes of Functions
- functions that do not pop the argument stack on the 386, see Section 6.26 Declaring Attributes of Functions
- functions that do pop the argument stack on the 386, see Section 6.26 Declaring Attributes of Functions
- functions that have no side effects, see Section 6.26 Declaring Attributes of Functions
- functions that never return, see Section 6.26 Declaring Attributes of Functions
- functions that pop the argument stack on the 386, see Section 6.26 Declaring Attributes of Functions
- functions which do not handle memory bank switching on 68HC11/68HC12, see Section 6.26 Declaring Attributes of Functions
- functions which handle memory bank switching, see Section 6.26 Declaring Attributes of Functions
- functions with non-null pointer arguments, see Section 6.26 Declaring Attributes of Functions
- functions with printf, scanf, strftime or strfmon style arguments, see Section 6.26 Declaring Attributes of Functions
- g in constraint, see Section 6.38.1 Simple Constraints
- G in constraint, see Section 6.38.1 Simple Constraints
G
- G++, see Chapter 2 Compile C, C++, Objective-C, Ada, Fortran, Java, or treelang
- g++, see Section 4.3 Compiling C++ Programs
- GCC, see Chapter 2 Compile C, C++, Objective-C, Ada, Fortran, Java, or treelang
- GCC command options, see Chapter 4 GCC Command Options
- GCC_EXEC_PREFIX, see Section 4.19 Environment Variables Affecting GCC
- gcc_struct, see Section 6.34 Specifying Attributes of Types
- gcc_struct attribute, see Section 6.33 Specifying Attributes of Variables
- generalized lvalues, see Section 6.7 Generalized Lvalues
- global offset table, see Section 4.18 Options for Code Generation Conventions
- global register after longjmp, see Section 6.40.1 Defining Global Register Variables
- global register variables, see Section 6.40.1 Defining Global Register Variables
- GNAT, see Chapter 2 Compile C, C++, Objective-C, Ada, Fortran, Java, or treelang
- goto with computed label, see Section 6.3 Labels as Values
- gprof, see Section 4.9 Options for Debugging Your Program or GCC
- grouping options, see Chapter 4 GCC Command Options
- H in constraint, see Section 6.38.1 Simple Constraints
I
- i386 Options, see Section 4.17.3 Intel 386 and AMD x86-64 Options
- IA-64 Options, see Section 4.17.4 IA-64 Options
- IBM RS/6000 and PowerPC Options, see Section 4.17.2 IBM RS/6000 and PowerPC Options
- identifier names, dollar signs in, see Section 6.30 Dollar Signs in Identifier Names
- identifiers, names in assembler code, see Section 6.39 Controlling Names Used in Assembler Code
- imaxabs, see Section 6.46 Other built-in functions provided by GCC
- implementation-defined behavior, C language, see Chapter 5 C Implementation-defined behavior
- implied #pragma implementation, see Section 7.5 Declarations and Definitions in One Header
- incompatibilities of GCC, see Section 11.5 Incompatibilities of GCC
- increment operators, see Section 12.1 Have You Found a Bug?
- index, see Section 6.46 Other built-in functions provided by GCC
- init_priority attribute, see Section 7.8 C++-Specific Variable, Function, and Type Attributes
- initializations in expressions, see Section 6.21 Compound Literals
- initializers with labeled elements, see Section 6.22 Designated Initializers
- initializers, non-constant, see Section 6.20 Non-Constant Initializers
- inline automatic for C++ member fns, see Section 6.36 An Inline Function is As Fast As a Macro
- inline functions, see Section 6.36 An Inline Function is As Fast As a Macro
- inline functions, omission of, see Section 6.36 An Inline Function is As Fast As a Macro
- inlining and C++ pragmas, see Section 7.5 Declarations and Definitions in One Header
- installation trouble, see Chapter 11 Known Causes of Trouble with GCC
- integrating function code, see Section 6.36 An Inline Function is As Fast As a Macro
- Intel 386 Options, see Section 4.17.3 Intel 386 and AMD x86-64 Options
- interface and implementation headers, C++, see Section 7.5 Declarations and Definitions in One Header
- intermediate C version, nonexistent, see Chapter 2 Compile C, C++, Objective-C, Ada, Fortran, Java, or treelang
- interrupt handler functions, see Section 6.26 Declaring Attributes of Functions
- introduction, see Chapter 1 Introduction
- invalid assembly code, see Section 12.1 Have You Found a Bug?
- invalid input, see Section 12.1 Have You Found a Bug?
- invoking g++, see Section 4.3 Compiling C++ Programs
- ISO 9899, see Chapter 3 Language Standards Supported by GCC
- ISO C, see Chapter 3 Language Standards Supported by GCC
- ISO C standard, see Chapter 3 Language Standards Supported by GCC
- ISO C90, see Chapter 3 Language Standards Supported by GCC
- ISO C94, see Chapter 3 Language Standards Supported by GCC
- ISO C95, see Chapter 3 Language Standards Supported by GCC
- ISO C99, see Chapter 3 Language Standards Supported by GCC
- ISO C9X, see Chapter 3 Language Standards Supported by GCC
- ISO support, see Section 4.4 Options Controlling C Dialect
- ISO/IEC 9899, see Chapter 3 Language Standards Supported by GCC
J
- Java, see Chapter 2 Compile C, C++, Objective-C, Ada, Fortran, Java, or treelang
- java_interface attribute, see Section 7.8 C++-Specific Variable, Function, and Type Attributes
L
- labeled elements in initializers, see Section 6.22 Designated Initializers
- labels as values, see Section 6.3 Labels as Values
- labs, see Section 6.46 Other built-in functions provided by GCC
- LANG, see Section 4.19 Environment Variables Affecting GCC
- language dialect options, see Section 4.4 Options Controlling C Dialect
- LC_ALL, see Section 4.19 Environment Variables Affecting GCC
- LC_CTYPE, see Section 4.19 Environment Variables Affecting GCC
- LC_MESSAGES, see Section 4.19 Environment Variables Affecting GCC
- length-zero arrays, see Section 6.12 Arrays of Length Zero
- Libraries, see Section 4.13 Options for Linking
- LIBRARY_PATH, see Section 4.19 Environment Variables Affecting GCC
- link options, see Section 4.13 Options for Linking
- LL integer suffix, see Section 6.9 Double-Word Integers
- llabs, see Section 6.46 Other built-in functions provided by GCC
- load address instruction, see Section 6.38.1 Simple Constraints
- local labels, see Section 6.2 Locally Declared Labels
- local variables in macros, see Section 6.6 Referring to a Type with typeof
- local variables, specifying registers, see Section 6.40.2 Specifying Registers for Local Variables
- locale, see Section 4.19 Environment Variables Affecting GCC
- locale definition, see Section 4.19 Environment Variables Affecting GCC
- log, see Section 6.46 Other built-in functions provided by GCC
- logf, see Section 6.46 Other built-in functions provided by GCC
- logl, see Section 6.46 Other built-in functions provided by GCC
- long long data types, see Section 6.9 Double-Word Integers
- longjmp, see Section 6.40.1 Defining Global Register Variables
- longjmp incompatibilities, see Section 11.5 Incompatibilities of GCC
- longjmp warnings, see Section 4.8 Options to Request or Suppress Warnings
- lvalues, generalized, see Section 6.7 Generalized Lvalues
- m in constraint, see Section 6.38.1 Simple Constraints
M
- machine dependent options, see Section 4.17 Hardware Models and Configurations
- machine specific constraints, see Section 6.38.4 Constraints for Particular Machines
- macro with variable arguments, see Section 6.15 Macros with a Variable Number of Arguments.
- macros containing asm, see Section 6.37 Assembler Instructions with C Expression Operands
- macros, inline alternative, see Section 6.36 An Inline Function is As Fast As a Macro
- macros, local labels, see Section 6.2 Locally Declared Labels
- macros, local variables in, see Section 6.6 Referring to a Type with typeof
- macros, statements in expressions, see Section 6.1 Statements and Declarations in Expressions
- macros, types of arguments, see Section 6.6 Referring to a Type with typeof
- make, see Section 4.11 Options Controlling the Preprocessor
- malloc, see Section 6.46 Other built-in functions provided by GCC
- malloc attribute, see Section 6.26 Declaring Attributes of Functions
- matching constraint, see Section 6.38.1 Simple Constraints
- maximum operator, see Section 7.1 Minimum and Maximum Operators in C++
- member fns, automatically inline, see Section 6.36 An Inline Function is As Fast As a Macro
- memcmp, see Section 6.46 Other built-in functions provided by GCC
- memcpy, see Section 6.46 Other built-in functions provided by GCC
- memory references in constraints, see Section 6.38.1 Simple Constraints
- mempcpy, see Section 6.46 Other built-in functions provided by GCC
- memset, see Section 6.46 Other built-in functions provided by GCC
- message formatting, see Section 4.7 Options to Control Diagnostic Messages Formatting
- messages, warning, see Section 4.8 Options to Request or Suppress Warnings
- messages, warning and error, see Section 11.12 Warning Messages and Error Messages
- middle-operands, omitted, see Section 6.8 Conditionals with Omitted Operands
- minimum operator, see Section 7.1 Minimum and Maximum Operators in C++
- misunderstandings in C++, see Section 11.9 Common Misunderstandings with GNU C++
- mixed declarations and code, see Section 6.25 Mixed Declarations and Code
- mktemp, and constant strings, see Section 11.5 Incompatibilities of GCC
- mode attribute, see Section 6.33 Specifying Attributes of Variables
- modifiers in constraints, see Section 6.38.3 Constraint Modifier Characters
- ms_struct, see Section 6.34 Specifying Attributes of Types
- ms_struct attribute, see Section 6.33 Specifying Attributes of Variables
- multi-line string literals, see Section 6.17 String Literals with Embedded Newlines
- multiple alternative constraints, see Section 6.38.2 Multiple Alternative Constraints
- multiprecision arithmetic, see Section 6.9 Double-Word Integers
- n in constraint, see Section 6.38.1 Simple Constraints
N
- names used in assembler code, see Section 6.39 Controlling Names Used in Assembler Code
- naming convention, implementation headers, see Section 7.5 Declarations and Definitions in One Header
- nearbyint, see Section 6.46 Other built-in functions provided by GCC
- nearbyintf, see Section 6.46 Other built-in functions provided by GCC
- nearbyintl, see Section 6.46 Other built-in functions provided by GCC
- nested functions, see Section 6.4 Nested Functions
- newlines (escaped), see Section 6.16 Slightly Looser Rules for Escaped Newlines
- no_instrument_function function attribute, see Section 6.26 Declaring Attributes of Functions
- nocommon attribute, see Section 6.33 Specifying Attributes of Variables
- noinline function attribute, see Section 6.26 Declaring Attributes of Functions
- non-constant initializers, see Section 6.20 Non-Constant Initializers
- non-static inline function, see Section 6.36 An Inline Function is As Fast As a Macro
- nonnull function attribute, see Section 6.26 Declaring Attributes of Functions
- noreturn function attribute, see Section 6.26 Declaring Attributes of Functions
- nothrow function attribute, see Section 6.26 Declaring Attributes of Functions
- o in constraint, see Section 6.38.1 Simple Constraints
O
- Objective-C, see Chapter 2 Compile C, C++, Objective-C, Ada, Fortran, Java, or treelang
- Objective-C options, command line, see Section 4.6 Options Controlling Objective-C Dialect
- offsettable address, see Section 6.38.1 Simple Constraints
- old-style function definitions, see Section 6.28 Prototypes and Old-Style Function Definitions
- omitted middle-operands, see Section 6.8 Conditionals with Omitted Operands
- open coding, see Section 6.36 An Inline Function is As Fast As a Macro
- operand constraints, asm, see Section 6.38 Constraints for asmOperands
- optimize options, see Section 4.10 Options That Control Optimization
- options to control diagnostics formatting, see Section 4.7 Options to Control Diagnostic Messages Formatting
- options to control warnings, see Section 4.8 Options to Request or Suppress Warnings
- options, C++, see Section 4.5 Options Controlling C++ Dialect
- options, code generation, see Section 4.18 Options for Code Generation Conventions
- options, debugging, see Section 4.9 Options for Debugging Your Program or GCC
- options, dialect, see Section 4.4 Options Controlling C Dialect
- options, directory search, see Section 4.14 Options for Directory Search
- options, GCC command, see Chapter 4 GCC Command Options
- options, grouping, see Chapter 4 GCC Command Options
- options, linking, see Section 4.13 Options for Linking
- options, Objective-C, see Section 4.6 Options Controlling Objective-C Dialect
- options, optimization, see Section 4.10 Options That Control Optimization
- options, order, see Chapter 4 GCC Command Options
- options, preprocessor, see Section 4.11 Options Controlling the Preprocessor
- order of evaluation, side effects, see Section 11.11 Certain Changes We Don't Want to Make
- order of options, see Chapter 4 GCC Command Options
- other register constraints, see Section 6.38.1 Simple Constraints
- output file option, see Section 4.2 Options Controlling the Kind of Output
- overloaded virtual fn, warning, see Section 4.5 Options Controlling C++ Dialect
- p in constraint, see Section 6.38.1 Simple Constraints
- packed attribute, see Section 6.33 Specifying Attributes of Variables
P
- parameter forward declaration, see Section 6.14 Arrays of Variable Length
- parameters, aliased, see Section 4.18 Options for Code Generation Conventions
- PIC, see Section 4.18 Options for Code Generation Conventions
- pmf, see Section 7.7 Extracting the function pointer from a bound pointer to member function
- pointer arguments, see Section 6.26 Declaring Attributes of Functions
- pointer to member function, see Section 7.7 Extracting the function pointer from a bound pointer to member function
- portions of temporary objects, pointers to, see Section 11.9.3 Temporaries May Vanish Before You Expect
- pow, see Section 6.46 Other built-in functions provided by GCC
- powf, see Section 6.46 Other built-in functions provided by GCC
- powl, see Section 6.46 Other built-in functions provided by GCC
- pragma, extern_prefix, see Section 6.48.3 Tru64 Pragmas
- pragma, longcall, see Section 6.48.1 RS/6000 and PowerPC Pragmas
- pragma, reason for not using, see Section 6.26 Declaring Attributes of Functions
- pragma, redefine_extname, see Section 6.48.2 Solaris Pragmas
- pragmas, see Section 6.48 Pragmas Accepted by GCC
- pragmas in C++, effect on inlining, see Section 7.5 Declarations and Definitions in One Header
- pragmas, interface and implementation, see Section 7.5 Declarations and Definitions in One Header
- pragmas, warning of unknown, see Section 4.8 Options to Request or Suppress Warnings
- precompiled headers, see Section 4.20 Using Precompiled Headers
- preprocessing numbers, see Section 11.5 Incompatibilities of GCC
- preprocessing tokens, see Section 11.5 Incompatibilities of GCC
- preprocessor options, see Section 4.11 Options Controlling the Preprocessor
- printf, see Section 6.46 Other built-in functions provided by GCC
- printf_unlocked, see Section 6.46 Other built-in functions provided by GCC
- prof, see Section 4.9 Options for Debugging Your Program or GCC
- promotion of formal parameters, see Section 6.28 Prototypes and Old-Style Function Definitions
- pure function attribute, see Section 6.26 Declaring Attributes of Functions
- push address instruction, see Section 6.38.1 Simple Constraints
- putchar, see Section 6.46 Other built-in functions provided by GCC
- puts, see Section 6.46 Other built-in functions provided by GCC
- qsort, and global register variables, see Section 6.40.1 Defining Global Register Variables
R
- ranges in case statements, see Section 6.23 Case Ranges
- read-only strings, see Section 11.5 Incompatibilities of GCC
- register variable after longjmp, see Section 6.40.1 Defining Global Register Variables
- registers, see Section 6.37 Assembler Instructions with C Expression Operands
- registers for local variables, see Section 6.40.2 Specifying Registers for Local Variables
- registers in constraints, see Section 6.38.1 Simple Constraints
- registers, global allocation, see Section 6.40 Variables in Specified Registers
- registers, global variables in, see Section 6.40.1 Defining Global Register Variables
- regparm attribute, see Section 6.26 Declaring Attributes of Functions
- reordering, warning, see Section 4.5 Options Controlling C++ Dialect
- reporting bugs, see Chapter 12 Reporting Bugs
- rest argument (in macro), see Section 6.15 Macros with a Variable Number of Arguments.
- restricted pointers, see Section 7.3 Restricting Pointer Aliasing
- restricted references, see Section 7.3 Restricting Pointer Aliasing
- restricted this pointer, see Section 7.3 Restricting Pointer Aliasing
- rindex, see Section 6.46 Other built-in functions provided by GCC
- round, see Section 6.46 Other built-in functions provided by GCC
- roundf, see Section 6.46 Other built-in functions provided by GCC
- roundl, see Section 6.46 Other built-in functions provided by GCC
- RS/6000 and PowerPC Options, see Section 4.17.2 IBM RS/6000 and PowerPC Options
- RTTI, see Section 7.4 Vague Linkage
- run-time options, see Section 4.18 Options for Code Generation Conventions
- s in constraint, see Section 6.38.1 Simple Constraints
S
- S/390 and zSeries Options, see Section 4.17.5 S/390 and zSeries Options
- scanf, see Section 6.46 Other built-in functions provided by GCC
- scanf, and constant strings, see Section 11.5 Incompatibilities of GCC
- scope of a variable length array, see Section 6.14 Arrays of Variable Length
- scope of declaration, see Section 11.8 Disappointments and Misunderstandings
- scope of external declarations, see Section 11.5 Incompatibilities of GCC
- search path, see Section 4.14 Options for Directory Search
- section function attribute, see Section 6.26 Declaring Attributes of Functions
- section variable attribute, see Section 6.33 Specifying Attributes of Variables
- setjmp, see Section 6.40.1 Defining Global Register Variables
- setjmp incompatibilities, see Section 11.5 Incompatibilities of GCC
- shared strings, see Section 11.5 Incompatibilities of GCC
- shared variable attribute, see Section 6.33 Specifying Attributes of Variables
- side effect in ?:, see Section 6.8 Conditionals with Omitted Operands
- side effects, macro argument, see Section 6.1 Statements and Declarations in Expressions
- side effects, order of evaluation, see Section 11.11 Certain Changes We Don't Want to Make
- signed and unsigned values, comparison warning, see Section 4.8 Options to Request or Suppress Warnings
- simple constraints, see Section 6.38.1 Simple Constraints
- sin, see Section 6.46 Other built-in functions provided by GCC
- sinf, see Section 6.46 Other built-in functions provided by GCC
- sinl, see Section 6.46 Other built-in functions provided by GCC
- sizeof, see Section 6.6 Referring to a Type with typeof
- smaller data references (PowerPC), see Section 4.17.2 IBM RS/6000 and PowerPC Options
- snprintf, see Section 6.46 Other built-in functions provided by GCC
- Spec Files, see Section 4.15 Specifying subprocesses and the switches to pass to them
- specified registers, see Section 6.40 Variables in Specified Registers
- specifying compiler version and target machine, see Section 4.16 Specifying Target Machine and Compiler Version
- specifying hardware config, see Section 4.17 Hardware Models and Configurations
- specifying machine version, see Section 4.16 Specifying Target Machine and Compiler Version
- specifying registers for local variables, see Section 6.40.2 Specifying Registers for Local Variables
- speed of compilation, see Section 4.20 Using Precompiled Headers
- sprintf, see Section 6.46 Other built-in functions provided by GCC
- sqrt, see Section 6.46 Other built-in functions provided by GCC
- sqrtf, see Section 6.46 Other built-in functions provided by GCC
- sqrtl, see Section 6.46 Other built-in functions provided by GCC
- sscanf, see Section 6.46 Other built-in functions provided by GCC
- sscanf, and constant strings, see Section 11.5 Incompatibilities of GCC
- statements inside expressions, see Section 6.1 Statements and Declarations in Expressions
- static data in C++, declaring and defining, see Section 11.9.1 Declare andDefine Static Members
- stpcpy, see Section 6.46 Other built-in functions provided by GCC
- strcat, see Section 6.46 Other built-in functions provided by GCC
- strchr, see Section 6.46 Other built-in functions provided by GCC
- strcmp, see Section 6.46 Other built-in functions provided by GCC
- strcpy, see Section 6.46 Other built-in functions provided by GCC
- strcspn, see Section 6.46 Other built-in functions provided by GCC
- strdup, see Section 6.46 Other built-in functions provided by GCC
- string constants, see Section 11.5 Incompatibilities of GCC
- strlen, see Section 6.46 Other built-in functions provided by GCC
- strncat, see Section 6.46 Other built-in functions provided by GCC
- strncmp, see Section 6.46 Other built-in functions provided by GCC
- strncpy, see Section 6.46 Other built-in functions provided by GCC
- strpbrk, see Section 6.46 Other built-in functions provided by GCC
- strrchr, see Section 6.46 Other built-in functions provided by GCC
- strspn, see Section 6.46 Other built-in functions provided by GCC
- strstr, see Section 6.46 Other built-in functions provided by GCC
- struct, see Section 6.49 Unnamed struct/union fields within structs/unions.
- structures, see Section 11.5 Incompatibilities of GCC
- structures, constructor expression, see Section 6.21 Compound Literals
- submodel options, see Section 4.17 Hardware Models and Configurations
- subscripting, see Section 6.18 Non-Lvalue Arrays May Have Subscripts
- subscripting and function values, see Section 6.18 Non-Lvalue Arrays May Have Subscripts
- suffixes for C++ source, see Section 4.3 Compiling C++ Programs
- suppressing warnings, see Section 4.8 Options to Request or Suppress Warnings
- surprises in C++, see Section 11.9 Common Misunderstandings with GNU C++
- syntax checking, see Section 4.8 Options to Request or Suppress Warnings
- synthesized methods, warning, see Section 4.5 Options Controlling C++ Dialect
- system headers, warnings from, see Section 4.8 Options to Request or Suppress Warnings
T
- tan, see Section 6.46 Other built-in functions provided by GCC
- tanf, see Section 6.46 Other built-in functions provided by GCC
- tanl, see Section 6.46 Other built-in functions provided by GCC
- target machine, specifying, see Section 4.16 Specifying Target Machine and Compiler Version
- target options, see Section 4.16 Specifying Target Machine and Compiler Version
- TC1, see Chapter 3 Language Standards Supported by GCC
- TC2, see Chapter 3 Language Standards Supported by GCC
- Technical Corrigenda, see Chapter 3 Language Standards Supported by GCC
- Technical Corrigendum 1, see Chapter 3 Language Standards Supported by GCC
- Technical Corrigendum 2, see Chapter 3 Language Standards Supported by GCC
- template instantiation, see Section 7.6 Where's the Template?
- temporaries, lifetime of, see Section 11.9.3 Temporaries May Vanish Before You Expect
- Thread-Local Storage, see Section 6.50 Thread-Local Storage
- thunks, see Section 6.4 Nested Functions
- TLS, see Section 6.50 Thread-Local Storage
- tls_model attribute, see Section 6.33 Specifying Attributes of Variables
- TMPDIR, see Section 4.19 Environment Variables Affecting GCC
- traditional C language, see Section 4.4 Options Controlling C Dialect
- treelang, see Chapter 3 Language Standards Supported by GCC
- treelang, see Chapter 2 Compile C, C++, Objective-C, Ada, Fortran, Java, or treelang
- trunc, see Section 6.46 Other built-in functions provided by GCC
- truncf, see Section 6.46 Other built-in functions provided by GCC
- truncl, see Section 6.46 Other built-in functions provided by GCC
- two-stage name lookup, see Section 11.9.2 Name lookup, templates, and accessing members of base classes
- type alignment, see Section 6.32 Inquiring on Alignment of Types or Variables
- type attributes, see Section 6.34 Specifying Attributes of Types
- type_info, see Section 7.4 Vague Linkage
- typedef names as function parameters, see Section 11.5 Incompatibilities of GCC
- typeof, see Section 6.6 Referring to a Type with typeof
- ULL integer suffix, see Section 6.9 Double-Word Integers
U
- Ultrix calling convention, see Section 11.3 Interoperation
- undefined behavior, see Section 12.1 Have You Found a Bug?
- undefined function value, see Section 12.1 Have You Found a Bug?
- underscores in variables in macros, see Section 6.6 Referring to a Type with typeof
- union, see Section 6.49 Unnamed struct/union fields within structs/unions.
- union, casting to a, see Section 6.24 Cast to a Union Type
- unions, see Section 11.5 Incompatibilities of GCC
- unknown pragmas, warning, see Section 4.8 Options to Request or Suppress Warnings
- unresolved references and -nodefaultlibs, see Section 4.13 Options for Linking
- unresolved references and -nostdlib, see Section 4.13 Options for Linking
- unused attribute., see Section 6.26 Declaring Attributes of Functions
- used attribute., see Section 6.26 Declaring Attributes of Functions
- V in constraint, see Section 6.38.1 Simple Constraints
V
- vague linkage, see Section 7.4 Vague Linkage
- value after longjmp, see Section 6.40.1 Defining Global Register Variables
- variable alignment, see Section 6.32 Inquiring on Alignment of Types or Variables
- variable attributes, see Section 6.33 Specifying Attributes of Variables
- variable number of arguments, see Section 6.15 Macros with a Variable Number of Arguments.
- variable-length array scope, see Section 6.14 Arrays of Variable Length
- variable-length arrays, see Section 6.14 Arrays of Variable Length
- variables in specified registers, see Section 6.40 Variables in Specified Registers
- variables, local, in macros, see Section 6.6 Referring to a Type with typeof
- variadic macros, see Section 6.15 Macros with a Variable Number of Arguments.
- visibility attribute, see Section 6.26 Declaring Attributes of Functions
- VLAs, see Section 6.14 Arrays of Variable Length
- void pointers, arithmetic, see Section 6.19 Arithmetic on void- and Function-Pointers
- void, size of pointer to, see Section 6.19 Arithmetic on void- and Function-Pointers
- volatile access, see Section 7.2 When is a Volatile Object Accessed?
- volatile applied to function, see Section 6.26 Declaring Attributes of Functions
- volatile read, see Section 7.2 When is a Volatile Object Accessed?
- volatile write, see Section 7.2 When is a Volatile Object Accessed?
- vprintf, see Section 6.46 Other built-in functions provided by GCC
- vscanf, see Section 6.46 Other built-in functions provided by GCC
- vsnprintf, see Section 6.46 Other built-in functions provided by GCC
- vsprintf, see Section 6.46 Other built-in functions provided by GCC
- vsscanf, see Section 6.46 Other built-in functions provided by GCC
- vtable, see Section 7.4 Vague Linkage
W
- warning for comparison of signed and unsigned values, see Section 4.8 Options to Request or Suppress Warnings
- warning for overloaded virtual fn, see Section 4.5 Options Controlling C++ Dialect
- warning for reordering of member initializers, see Section 4.5 Options Controlling C++ Dialect
- warning for synthesized methods, see Section 4.5 Options Controlling C++ Dialect
- warning for unknown pragmas, see Section 4.8 Options to Request or Suppress Warnings
- warning messages, see Section 4.8 Options to Request or Suppress Warnings
- warnings from system headers, see Section 4.8 Options to Request or Suppress Warnings
- warnings vs errors, see Section 11.12 Warning Messages and Error Messages
- weak attribute, see Section 6.26 Declaring Attributes of Functions
- whitespace, see Section 11.5 Incompatibilities of GCC
- X in constraint, see Section 6.38.1 Simple Constraints