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(gcc-295.info)DBX Options

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Specific Options for DBX Output
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   These are specific options for DBX output.

`DBX_DEBUGGING_INFO'
     Define this macro if GNU CC should produce debugging output for DBX
     in response to the `-g' option.

`XCOFF_DEBUGGING_INFO'
     Define this macro if GNU CC should produce XCOFF format debugging
     output in response to the `-g' option.  This is a variant of DBX
     format.

`DEFAULT_GDB_EXTENSIONS'
     Define this macro to control whether GNU CC should by default
     generate GDB's extended version of DBX debugging information
     (assuming DBX-format debugging information is enabled at all).  If
     you don't define the macro, the default is 1: always generate the
     extended information if there is any occasion to.

`DEBUG_SYMS_TEXT'
     Define this macro if all `.stabs' commands should be output while
     in the text section.

`ASM_STABS_OP'
     A C string constant naming the assembler pseudo op to use instead
     of `.stabs' to define an ordinary debugging symbol.  If you don't
     define this macro, `.stabs' is used.  This macro applies only to
     DBX debugging information format.

`ASM_STABD_OP'
     A C string constant naming the assembler pseudo op to use instead
     of `.stabd' to define a debugging symbol whose value is the current
     location.  If you don't define this macro, `.stabd' is used.  This
     macro applies only to DBX debugging information format.

`ASM_STABN_OP'
     A C string constant naming the assembler pseudo op to use instead
     of `.stabn' to define a debugging symbol with no name.  If you
     don't define this macro, `.stabn' is used.  This macro applies
     only to DBX debugging information format.

`DBX_NO_XREFS'
     Define this macro if DBX on your system does not support the
     construct `xsTAGNAME'.  On some systems, this construct is used to
     describe a forward reference to a structure named TAGNAME.  On
     other systems, this construct is not supported at all.

`DBX_CONTIN_LENGTH'
     A symbol name in DBX-format debugging information is normally
     continued (split into two separate `.stabs' directives) when it
     exceeds a certain length (by default, 80 characters).  On some
     operating systems, DBX requires this splitting; on others,
     splitting must not be done.  You can inhibit splitting by defining
     this macro with the value zero.  You can override the default
     splitting-length by defining this macro as an expression for the
     length you desire.

`DBX_CONTIN_CHAR'
     Normally continuation is indicated by adding a `\' character to
     the end of a `.stabs' string when a continuation follows.  To use
     a different character instead, define this macro as a character
     constant for the character you want to use.  Do not define this
     macro if backslash is correct for your system.

`DBX_STATIC_STAB_DATA_SECTION'
     Define this macro if it is necessary to go to the data section
     before outputting the `.stabs' pseudo-op for a non-global static
     variable.

`DBX_TYPE_DECL_STABS_CODE'
     The value to use in the "code" field of the `.stabs' directive for
     a typedef.  The default is `N_LSYM'.

`DBX_STATIC_CONST_VAR_CODE'
     The value to use in the "code" field of the `.stabs' directive for
     a static variable located in the text section.  DBX format does not
     provide any "right" way to do this.  The default is `N_FUN'.

`DBX_REGPARM_STABS_CODE'
     The value to use in the "code" field of the `.stabs' directive for
     a parameter passed in registers.  DBX format does not provide any
     "right" way to do this.  The default is `N_RSYM'.

`DBX_REGPARM_STABS_LETTER'
     The letter to use in DBX symbol data to identify a symbol as a
     parameter passed in registers.  DBX format does not customarily
     provide any way to do this.  The default is `'P''.

`DBX_MEMPARM_STABS_LETTER'
     The letter to use in DBX symbol data to identify a symbol as a
     stack parameter.  The default is `'p''.

`DBX_FUNCTION_FIRST'
     Define this macro if the DBX information for a function and its
     arguments should precede the assembler code for the function.
     Normally, in DBX format, the debugging information entirely
     follows the assembler code.

`DBX_LBRAC_FIRST'
     Define this macro if the `N_LBRAC' symbol for a block should
     precede the debugging information for variables and functions
     defined in that block.  Normally, in DBX format, the `N_LBRAC'
     symbol comes first.

`DBX_BLOCKS_FUNCTION_RELATIVE'
     Define this macro if the value of a symbol describing the scope of
     a block (`N_LBRAC' or `N_RBRAC') should be relative to the start
     of the enclosing function.  Normally, GNU C uses an absolute
     address.

`DBX_USE_BINCL'
     Define this macro if GNU C should generate `N_BINCL' and `N_EINCL'
     stabs for included header files, as on Sun systems.  This macro
     also directs GNU C to output a type number as a pair of a file
     number and a type number within the file.  Normally, GNU C does not
     generate `N_BINCL' or `N_EINCL' stabs, and it outputs a single
     number for a type number.