1 ; Options for the C, ObjC, C++ and ObjC++ front ends.
2 ; Copyright (C) 2003 Free Software Foundation, Inc.
4 ; This file is part of GCC.
6 ; GCC is free software; you can redistribute it and/or modify it under
7 ; the terms of the GNU General Public License as published by the Free
8 ; Software Foundation; either version 2, or (at your option) any later
11 ; GCC is distributed in the hope that it will be useful, but WITHOUT ANY
12 ; WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 ; FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
16 ; You should have received a copy of the GNU General Public License
17 ; along with GCC; see the file COPYING. If not, write to the Free
18 ; Software Foundation, 59 Temple Place - Suite 330, Boston, MA
22 ; This file is processed by the script opts.sh. It is a database of
23 ; command line options, with each record separated by a blank line,
24 ; and each field appearing on its own line. The first field is the
25 ; command-line switch with the leading "-" removed. All options
26 ; beginning with "f" or "W" are implicitly assumed to take a "no-"
27 ; form; this form should not be listed. If you do not want this
28 ; negative form and you want it to be automatically rejected, add
29 ; RejectNegative to the second field.
31 ; The second field is a space-separated list of which parts of the
32 ; compiler recognize the switch, as declared by "Language" entries.
33 ; If the switch takes an argument, then you should also specify
34 ; "Joined" and/or "Separate" to indicate where the argument can
35 ; appear. If a Joined argument can legitimately be omitted, specify
36 ; "JoinedOrMissing" instead of "Joined". If the argument to a switch
37 ; is a non-negative integer, you can specify "UInteger" and the switch
38 ; decoder will convert the argument for you, or complain to the user
39 ; if the argument is invalid.
41 ; The third field is the help text to output with --help. This is
42 ; automatically line-wrapped on output. Normally the switch is output
43 ; automatically, with the help text on the right hand side of the
44 ; output. However, if the help text contains a tab character, the
45 ; text to the left of the tab is output instead of the switch, and the
46 ; text to its right forms the help. This is useful for elaborating on
47 ; what type of argument a switch takes, for example. If the second
48 ; field contains "Undocumented" then nothing is output with --help.
49 ; Only do this with good reason like the switch being internal between
50 ; the driver and the front end - it is not an excuse to leave a switch
53 ; Comments can appear on their own line anwhere in the file, preceded
54 ; by a semicolon. Whitespace is permitted before the semicolon.
56 ; For each switch XXX below, an enumeration constant is created by the
57 ; script opts.sh spelt OPT_XXX, but with all non-alphanumeric
58 ; characters replaced with an underscore.
60 ; Please try to keep this file in ASCII collating order.
75 C ObjC C++ ObjC++ Joined Separate
78 C ObjC C++ ObjC++ Joined Separate
79 -A<question>=<answer> Assert the <answer> to <question>. Putting '-' before <question> disables the <answer> to <question>
83 Do not discard comments
87 Do not discard comments in macro expansions
90 C ObjC C++ ObjC++ Joined Separate
91 -D<macro>[=<val>] Define a <macro> with <val> as its value. If just <macro> is given, <val> is taken to be 1
94 C ObjC C++ ObjC++ Undocumented
98 Print the name of header files as they are used
101 C ObjC C++ ObjC++ Joined Separate
102 -I <dir> Add <dir> to the end of the main include path. -I- gives more include path control; see info documentation
106 Generate make dependencies
109 C ObjC C++ ObjC++ Separate
110 Generate make dependencies and compile
113 C ObjC C++ ObjC++ Joined Separate
114 -MF <file> Write dependency output to the given file
118 Treat missing header files as generated files
122 Like -M but ignore system header files
125 C ObjC C++ ObjC++ Separate
126 Like -MD but ignore system header files
130 Generate phony targets for all headers
133 C ObjC C++ ObjC++ Joined Separate
134 -MQ <target> Add a MAKE-quoted target
137 C ObjC C++ ObjC++ Joined Separate
138 -MT <target> Add an unquoted target
142 Do not generate #line directives
145 C ObjC C++ ObjC++ Joined Separate
146 -U<macro> Undefine <macro>
153 Enable most warning messages
157 Warn about casting functions to incompatible types
161 Warn about casts which discard qualifiers
165 Warn about subscripts whose type is \"char\"
169 Warn about possibly nested block comments, and C++ comments spanning more than one physical line
173 Synonym for -Wcomment
177 Warn about possibly confusing type conversions
181 Warn when all constructors and destructors are private
183 Wdeclaration-after-statement
185 Warn when a declaration is found after a statement
189 Warn about deprecated compiler features
193 Warn about compile-time integer division by zero
197 Warn about violations of Effective C++ style rules
201 Warn about stray tokens after #elif and #endif
205 ; Documented in common.opt
207 Werror-implicit-function-declaration
208 C ObjC RejectNegative
209 Make implicit function declarations an error
213 Warn if testing floating point numbers for equality
217 Warn about printf/scanf/strftime/strfmon format string anomalies
221 Warn if passing too many arguments to a function for its format string
225 Warn about format strings that are not literals
229 Warn about possible security problems with format functions
233 Warn about strftime formats yielding 2-digit years
239 C ObjC C++ ObjC++ Joined
244 Wimplicit-function-declaration
246 Warn about implicit function declarations
250 Warn when a declaration does not specify a type
254 Warn about uses of the \"#import\" directive
258 Warn about invalid uses of the \"offsetof\" macro
262 Warn about PCH files that are found but not used
266 Do not warn about using \"long long\" when -pedantic
270 Warn about suspicious declarations of \"main\"
274 Warn about possibly missing braces around initializers
276 Wmissing-declarations
278 Warn about global functions without previous declarations
280 Wmissing-format-attribute
282 Warn about functions which might be candidates for format attributes
286 Warn about global functions without prototypes
290 Warn about use of multi-character character constants
294 Warn about \"extern\" declarations not at file scope
298 Warn when non-templatized friend functions are declared within a template
302 Warn about non-virtual destructors
309 Warn if a C-style cast is used in a program
313 Warn about overloaded virtual function names
317 Warn about possibly missing parentheses
321 Warn when converting the type of pointers to member functions
325 Warn about function pointer arithmetic
329 Warn if inherited methods are unimplemented
333 Warn about multiple declarations of the same object
337 Warn when the compiler reorders code
341 Warn whenever a function's return type defaults to \"int\" (C), or about inconsistent return types (C++)
345 Warn if a selector has multiple methods
349 Warn about possible violations of sequence point rules
353 Warn about signed-unsigned comparisons
357 Warn when overload promotes from unsigned to signed
361 Warn about unprototyped function declarations
365 Warn when synthesis behavior differs from Cfront
369 Do not suppress warnings from system headers
373 Warn about features not present in traditional C
377 Warn if trigraphs are encountered that might affect the meaning of the program
384 Warn if an undefined macro is used in an #if directive
388 Warn about unrecognized pragmas
392 Warn about macros defined in the main file that are not used
396 Give strings the type \"array of char\"
400 A synonym for -std=c89. In a future version of GCC it will become synonymous with -std=c99 instead
403 C ObjC C++ ObjC++ Joined
404 ; Documented in common.opt. FIXME - what about -dI, -dD, -dN and -dD?
407 C++ ObjC++ Joined UInteger
411 Enforce class member access control semantics
416 falt-external-templates
418 Change when template instances are emitted
422 Recognize the \"asm\" keyword
426 Recognize built-in functions
429 C ObjC C++ ObjC++ Joined
433 Check the return value of new
437 Allow the arguments of the '?' operator to have different types
441 Reduce the size of object files
445 Make string literals \"const char[]\" not \"char[]\"
447 fconstant-string-class=
449 -fconst-string-class=<name> Use class <name> for constant strings
453 Inline member functions by default
455 fdollars-in-identifiers
457 Permit '$' as an identifier character
460 C ObjC C++ ObjC++ Joined RejectNegative
461 -fdump-<type> Dump various compiler internals to a file
468 Generate code to check exception specifications
474 C ObjC C++ ObjC++ Joined RejectNegative
475 -fexec-charset=<cset> Convert all strings and character constants to character set <cset>
488 Scope of for-init-statement variables is local to the loop
492 Do not assume that standard C libraries and \"main\" exist
496 Recognize GNU-defined keywords
500 Generate code for GNU runtime environment
513 Assume normal C execution environment
517 Enable support for huge objects
521 Export functions even if they can be inlined
523 fimplicit-inline-templates
525 Emit implicit instantiations of inline templates
529 Emit implicit instantiations of templates
536 Don't warn about uses of Microsoft extensions
538 fname-mangling-version-
546 Generate code for NeXT runtime environment
556 Recognize C++ kewords like \"compl\" and \"xor\"
560 Enable optional diagnostics
567 Downgrade conformance errors to warnings
571 Treat the input file as already preprocessed
575 Enable automatic template instantiation
579 Generate run time type descriptor information
583 Use the same size for double as for float
587 Use the narrowest integer type possible for enumeration types
591 Force the underlying type for \"wchar_t\" to be \"unsigned short\"
598 When \"signed\" or \"unsigned\" is not given make the bitfield signed
602 Make \"char\" signed by default
609 Display statistics accumulated during compilation
615 C ObjC C++ ObjC++ Joined RejectNegative UInteger
616 -ftabstop=<number> Distance between tab stops for column reporting
619 C++ ObjC++ Joined RejectNegative UInteger
620 -ftemplate-depth-<number> Specify maximum template instantiation depth
627 When \"signed\" or \"unsigned\" is not given make the bitfield unsigned
631 Make \"char\" unsigned by default
635 Use __cxa_atexit to register destructors
639 Discard unused virtual functions
643 Implement vtables using thunks
647 Emit common-like symbols as weak symbols
650 C ObjC C++ ObjC++ Joined RejectNegative
651 -fwide-exec-charset=<cset> Convert all wide strings and character constants to character set <cset>
655 Emit cross referencing information
659 Dump declarations to a .decl file
662 C ObjC C++ ObjC++ Joined Separate
663 -idirafter <dir> Add <dir> to the end of the system include path
666 C ObjC C++ ObjC++ Joined Separate
667 -imacros <file> Accept definition of macros in <file>
670 C ObjC C++ ObjC++ Joined Separate
671 -include <file> Include the contents of <file> before other files
674 C ObjC C++ ObjC++ Joined Separate
675 -iprefix <path> Specify <path> as a prefix for next two options
678 C ObjC C++ ObjC++ Joined Separate
679 -isysroot <dir> Set <dir> to be the system root directory
682 C ObjC C++ ObjC++ Joined Separate
683 -isystem <dir> Add <dir> to the start of the system include path
686 C ObjC C++ ObjC++ Joined Separate
687 -iwithprefix <dir> Add <dir> to the end of the system include path
690 C ObjC C++ ObjC++ Joined Separate
691 -iwithprefixbefore <dir> Add <dir> to the end of the main include path
697 C ObjC C++ ObjC++ Undocumented
701 Do not search standard system include directories (those specified with -isystem will still be used)
705 Do not search standard system include directories for C++
708 C ObjC C++ ObjC++ Joined Separate
709 ; Documented in common.opt
713 ; Documented in common.opt
717 ; Documented in common.opt
719 print-objc-runtime-info
721 Generate C header of platform-specific features
725 Remap file names when including files
729 Conform to the ISO 1998 C++ standard
733 Conform to the ISO 1990 C standard
737 Conform to the ISO 1999 C standard
741 Deprecated in favor of -std=c99
745 Conform to the ISO 1998 C++ standard with GNU extensions
749 Conform to the ISO 1990 C standard with GNU extensions
753 Conform to the ISO 1999 C standard with GNU extensions
757 Deprecated in favor of -std=gnu99
761 Deprecated in favor of -std=c89
765 Conform to the ISO 1990 C standard as amended in 1994
769 Deprecated in favor of -std=c99
773 Deprecated in favor of -std=c99
777 Enable traditional preprocessing
781 -trigraphs Support ISO C trigraphs
785 Do not predefine system-specific and GCC-specific macros
789 Enable verbose output
793 ; Documented in common.opt
795 ; This comment is to ensure we retain the blank line above.