RTEMS GNU Tools On-Line Library

SDB and DWARF

Using and Porting the GNU Compiler Collection (GCC)

17.17.5: Macros for SDB and DWARF Output

Here are macros for SDB and DWARF output.

SDB_DEBUGGING_INFO: Define this macro if GNU CC should produce COFF-style debugging output for SDB in response to the `-g' option.
DWARF_DEBUGGING_INFO: Define this macro if GNU CC should produce dwarf format debugging output in response to the `-g' option.
DWARF2_DEBUGGING_INFO: Define this macro if GNU CC should produce dwarf version 2 format debugging output in response to the `-g' option.
To support optional call frame debugging information, you must also define INCOMING_RETURN_ADDR_RTX and either set RTX_FRAME_RELATED_P on the prologue insns if you use RTL for the prologue, or call dwarf2out_def_cfa and dwarf2out_reg_save as appropriate from FUNCTION_PROLOGUE if you don't.
DWARF2_FRAME_INFO: Define this macro to a nonzero value if GNU CC should always output Dwarf 2 frame information. If DWARF2_UNWIND_INFO (see Exception Region Output is nonzero, GNU CC will output this information not matter how you define DWARF2_FRAME_INFO.
LINKER_DOES_NOT_WORK_WITH_DWARF2: Define this macro if the linker does not work with Dwarf version 2. Normally, if the user specifies only `-ggdb' GNU CC will use Dwarf version 2 if available; this macro disables this. See the description of the PREFERRED_DEBUGGING_TYPE macro for more details.
PUT_SDB_...: Define these macros to override the assembler syntax for the special SDB assembler directives. See `sdbout.c' for a list of these macros and their arguments. If the standard syntax is used, you need not define them yourself.
SDB_DELIM: Some assemblers do not support a semicolon as a delimiter, even between SDB assembler directives. In that case, define this macro to be the delimiter to use (usually `\n'). It is not necessary to define a new set of PUT_SDB_op macros if this is the only change required.
SDB_GENERATE_FAKE: Define this macro to override the usual method of constructing a dummy name for anonymous structure and union types. See `sdbout.c' for more information.
SDB_ALLOW_UNKNOWN_REFERENCES: Define this macro to allow references to unknown structure, union, or enumeration tags to be emitted. Standard COFF does not allow handling of unknown references, MIPS ECOFF has support for it.
SDB_ALLOW_FORWARD_REFERENCES: Define this macro to allow references to structure, union, or enumeration tags that have not yet been seen to be handled. Some assemblers choke if forward tags are used, while some require it.

Using and Porting the GNU Compiler Collection (GCC)