1 What has changed in GDB?
2 (Organized release by release)
4 *** Changes since GDB-4.17:
8 For 64 bit targets, the memory packets ("M" and "m") can now contain a
9 full 64 bit address. The class-obscure gdb command:
10 set targetaddresssize 32
11 can be used to revert to the old behavour. For existing remote stubs
12 the change should not be noticed as the additional address information
16 *** Changes in GDB-4.17:
18 * New native configurations
20 Alpha GNU/Linux alpha*-*-linux*
21 Unixware 2.x i[3456]86-unixware2*
22 Irix 6.x mips*-sgi-irix6*
23 PowerPC GNU/Linux powerpc-*-linux*
24 PowerPC Solaris powerpcle-*-solaris*
25 Sparc GNU/Linux sparc-*-linux*
26 Motorola sysV68 R3V7.1 m68k-motorola-sysv
30 Argonaut Risc Chip (ARC) arc-*-*
31 Hitachi H8/300S h8300*-*-*
32 Matsushita MN10200 w/simulator mn10200-*-*
33 Matsushita MN10300 w/simulator mn10300-*-*
34 MIPS NEC VR4100 mips64*vr4100*{,el}-*-elf*
35 MIPS NEC VR5000 mips64*vr5000*{,el}-*-elf*
36 MIPS Toshiba TX39 mips64*tx39*{,el}-*-elf*
37 Mitsubishi D10V w/simulator d10v-*-*
38 Mitsubishi M32R/D w/simulator m32r-*-elf*
39 Tsqware Sparclet sparclet-*-*
40 NEC V850 w/simulator v850-*-*
42 * New debugging protocols
44 ARM with RDI protocol arm*-*-*
45 M68K with dBUG monitor m68*-*-{aout,coff,elf}
46 DDB and LSI variants of PMON protocol mips*-*-*
47 PowerPC with DINK32 monitor powerpc{,le}-*-eabi
48 PowerPC with SDS protocol powerpc{,le}-*-eabi
49 Macraigor OCD (Wiggler) devices powerpc{,le}-*-eabi
53 All configurations can now understand and use the DWARF 2 debugging
54 format. The choice is automatic, if the symbol file contains DWARF 2
60 GDB now includes basic Java language support. This support is
61 only useful with Java compilers that produce native machine code.
64 * solib-absolute-prefix and solib-search-path
66 For SunOS and SVR4 shared libraries, you may now set the prefix for
67 loading absolute shared library symbol files, and the search path for
68 locating non-absolute shared library symbol files.
70 * Live range splitting
72 GDB can now effectively debug code for which GCC has performed live
73 range splitting as part of its optimization. See gdb/doc/LRS for
74 more details on the expected format of the stabs information.
78 GDB's support for the GNU Hurd, including thread debugging, has been
79 updated to work with current versions of the Hurd.
83 GDB's ARM target configuration now handles the ARM7T (Thumb) 16-bit
84 instruction set. ARM GDB automatically detects when Thumb
85 instructions are in use, and adjusts disassembly and backtracing
90 GDB's MIPS target configurations now handle the MIP16 16-bit
95 GDB now includes support for overlays; if an executable has been
96 linked such that multiple sections are based at the same address, GDB
97 will decide which section to use for symbolic info. You can choose to
98 control the decision manually, using overlay commands, or implement
99 additional target-side support and use "overlay load-target" to bring
100 in the overlay mapping. Do "help overlay" for more detail.
104 The command "info symbol <address>" displays information about
105 the symbol at the specified address.
109 The standard remote protocol now includes an extension that allows
110 asynchronous collection and display of trace data. This requires
111 extensive support in the target-side debugging stub. Tracing mode
112 includes a new interaction mode in GDB and new commands: see the
113 file tracepoint.c for more details.
117 Configurations for embedded MIPS now include a simulator contributed
118 by Cygnus Solutions. The simulator supports the instruction sets
119 of most MIPS variants.
123 Sparc configurations may now include the ERC32 simulator contributed
124 by the European Space Agency. The simulator is not built into
125 Sparc targets by default; configure with --enable-sim to include it.
129 For target configurations that may include multiple variants of a
130 basic architecture (such as MIPS and SH), you may now set the
131 architecture explicitly. "set arch" sets, "info arch" lists
132 the possible architectures.
134 *** Changes in GDB-4.16:
136 * New native configurations
138 Windows 95, x86 Windows NT i[345]86-*-cygwin32
139 M68K NetBSD m68k-*-netbsd*
140 PowerPC AIX 4.x powerpc-*-aix*
141 PowerPC MacOS powerpc-*-macos*
142 PowerPC Windows NT powerpcle-*-cygwin32
143 RS/6000 AIX 4.x rs6000-*-aix4*
147 ARM with RDP protocol arm-*-*
148 I960 with MON960 i960-*-coff
149 MIPS VxWorks mips*-*-vxworks*
150 MIPS VR4300 with PMON mips64*vr4300{,el}-*-elf*
151 PowerPC with PPCBUG monitor powerpc{,le}-*-eabi*
153 Matra Sparclet sparclet-*-*
157 The powerpc-eabi configuration now includes the PSIM simulator,
158 contributed by Andrew Cagney, with assistance from Mike Meissner.
159 PSIM is a very elaborate model of the PowerPC, including not only
160 basic instruction set execution, but also details of execution unit
161 performance and I/O hardware. See sim/ppc/README for more details.
165 GDB now works with Solaris 2.5.
167 * Windows 95/NT native
169 GDB will now work as a native debugger on Windows 95 and Windows NT.
170 To build it from source, you must use the "gnu-win32" environment,
171 which uses a DLL to emulate enough of Unix to run the GNU tools.
172 Further information, binaries, and sources are available at
173 ftp.cygnus.com, under pub/gnu-win32.
175 * dont-repeat command
177 If a user-defined command includes the command `dont-repeat', then the
178 command will not be repeated if the user just types return. This is
179 useful if the command is time-consuming to run, so that accidental
180 extra keystrokes don't run the same command many times.
182 * Send break instead of ^C
184 The standard remote protocol now includes an option to send a break
185 rather than a ^C to the target in order to interrupt it. By default,
186 GDB will send ^C; to send a break, set the variable `remotebreak' to 1.
188 * Remote protocol timeout
190 The standard remote protocol includes a new variable `remotetimeout'
191 that allows you to set the number of seconds before GDB gives up trying
192 to read from the target. The default value is 2.
194 * Automatic tracking of dynamic object loading (HPUX and Solaris only)
196 By default GDB will automatically keep track of objects as they are
197 loaded and unloaded by the dynamic linker. By using the command `set
198 stop-on-solib-events 1' you can arrange for GDB to stop the inferior
199 when shared library events occur, thus allowing you to set breakpoints
200 in shared libraries which are explicitly loaded by the inferior.
202 Note this feature does not work on hpux8. On hpux9 you must link
203 /usr/lib/end.o into your program. This feature should work
204 automatically on hpux10.
206 * Irix 5.x hardware watchpoint support
208 Irix 5 configurations now support the use of hardware watchpoints.
210 * Mips protocol "SYN garbage limit"
212 When debugging a Mips target using the `target mips' protocol, you
213 may set the number of characters that GDB will ignore by setting
214 the `syn-garbage-limit'. A value of -1 means that GDB will ignore
215 every character. The default value is 1050.
217 * Recording and replaying remote debug sessions
219 If you set `remotelogfile' to the name of a file, gdb will write to it
220 a recording of a remote debug session. This recording may then be
221 replayed back to gdb using "gdbreplay". See gdbserver/README for
222 details. This is useful when you have a problem with GDB while doing
223 remote debugging; you can make a recording of the session and send it
224 to someone else, who can then recreate the problem.
226 * Speedups for remote debugging
228 GDB includes speedups for downloading and stepping MIPS systems using
229 the IDT monitor, fast downloads to the Hitachi SH E7000 emulator,
230 and more efficient S-record downloading.
232 * Memory use reductions and statistics collection
234 GDB now uses less memory and reports statistics about memory usage.
235 Try the `maint print statistics' command, for example.
237 *** Changes in GDB-4.15:
241 The symbol reader for AIX GDB now uses partial symbol tables. This
242 can greatly improve startup time, especially for large executables.
244 * Remote targets use caching
246 Remote targets now use a data cache to speed up communication with the
247 remote side. The data cache could lead to incorrect results because
248 it doesn't know about volatile variables, thus making it impossible to
249 debug targets which use memory mapped I/O devices. `set remotecache
250 off' turns the the data cache off.
252 * Remote targets may have threads
254 The standard remote protocol now includes support for multiple threads
255 in the target system, using new protocol commands 'H' and 'T'. See
256 gdb/remote.c for details.
260 If GDB is configured with `--enable-netrom', then it will include
261 support for the NetROM ROM emulator from XLNT Designs. The NetROM
262 acts as though it is a bank of ROM on the target board, but you can
263 write into it over the network. GDB's support consists only of
264 support for fast loading into the emulated ROM; to debug, you must use
265 another protocol, such as standard remote protocol. The usual
266 sequence is something like
268 target nrom <netrom-hostname>
270 target remote <netrom-hostname>:1235
274 GDB now includes support for the Apple Macintosh, as a host only. It
275 may be run as either an MPW tool or as a standalone application, and
276 it can debug through the serial port. All the usual GDB commands are
277 available, but to the target command, you must supply "serial" as the
278 device type instead of "/dev/ttyXX". See mpw-README in the main
279 directory for more information on how to build. The MPW configuration
280 scripts */mpw-config.in support only a few targets, and only the
281 mips-idt-ecoff target has been tested.
285 GDB configuration now uses autoconf. This is not user-visible,
286 but does simplify configuration and building.
290 GDB now supports hpux10.
292 *** Changes in GDB-4.14:
294 * New native configurations
296 x86 FreeBSD i[345]86-*-freebsd
297 x86 NetBSD i[345]86-*-netbsd
298 NS32k NetBSD ns32k-*-netbsd
299 Sparc NetBSD sparc-*-netbsd
303 A29K VxWorks a29k-*-vxworks
304 HP PA PRO embedded (WinBond W89K & Oki OP50N) hppa*-*-pro*
305 CPU32 EST-300 emulator m68*-*-est*
306 PowerPC ELF powerpc-*-elf
309 * Alpha OSF/1 support for procfs
311 GDB now supports procfs under OSF/1-2.x and higher, which makes it
312 possible to attach to running processes. As the mounting of the /proc
313 filesystem is optional on the Alpha, GDB automatically determines
314 the availability of /proc during startup. This can lead to problems
315 if /proc is unmounted after GDB has been started.
317 * Arguments to user-defined commands
319 User commands may accept up to 10 arguments separated by whitespace.
320 Arguments are accessed within the user command via $arg0..$arg9. A
323 print $arg0 + $arg1 + $arg2
325 To execute the command use:
328 Defines the command "adder" which prints the sum of its three arguments.
329 Note the arguments are text substitutions, so they may reference variables,
330 use complex expressions, or even perform inferior function calls.
332 * New `if' and `while' commands
334 This makes it possible to write more sophisticated user-defined
335 commands. Both commands take a single argument, which is the
336 expression to evaluate, and must be followed by the commands to
337 execute, one per line, if the expression is nonzero, the list being
338 terminated by the word `end'. The `if' command list may include an
339 `else' word, which causes the following commands to be executed only
340 if the expression is zero.
342 * Fortran source language mode
344 GDB now includes partial support for Fortran 77. It will recognize
345 Fortran programs and can evaluate a subset of Fortran expressions, but
346 variables and functions may not be handled correctly. GDB will work
347 with G77, but does not yet know much about symbols emitted by other
350 * Better HPUX support
352 Most debugging facilities now work on dynamic executables for HPPAs
353 running hpux9 or later. You can attach to running dynamically linked
354 processes, but by default the dynamic libraries will be read-only, so
355 for instance you won't be able to put breakpoints in them. To change
356 that behavior do the following before running the program:
362 This will cause the libraries to be mapped private and read-write.
363 To revert to the normal behavior, do this:
369 You cannot set breakpoints or examine data in the library until after
370 the library is loaded if the function/data symbols do not have
373 GDB can now also read debug symbols produced by the HP C compiler on
374 HPPAs (sorry, no C++, Fortran or 68k support).
376 * Target byte order now dynamically selectable
378 You can choose which byte order to use with a target system, via the
379 commands "set endian big" and "set endian little", and you can see the
380 current setting by using "show endian". You can also give the command
381 "set endian auto", in which case GDB will use the byte order
382 associated with the executable. Currently, only embedded MIPS
383 configurations support dynamic selection of target byte order.
385 * New DOS host serial code
387 This version uses DPMI interrupts to handle buffered I/O, so you
388 no longer need to run asynctsr when debugging boards connected to
391 *** Changes in GDB-4.13:
393 * New "complete" command
395 This lists all the possible completions for the rest of the line, if it
396 were to be given as a command itself. This is intended for use by emacs.
398 * Trailing space optional in prompt
400 "set prompt" no longer adds a space for you after the prompt you set. This
401 allows you to set a prompt which ends in a space or one that does not.
403 * Breakpoint hit counts
405 "info break" now displays a count of the number of times the breakpoint
406 has been hit. This is especially useful in conjunction with "ignore"; you
407 can ignore a large number of breakpoint hits, look at the breakpoint info
408 to see how many times the breakpoint was hit, then run again, ignoring one
409 less than that number, and this will get you quickly to the last hit of
412 * Ability to stop printing at NULL character
414 "set print null-stop" will cause GDB to stop printing the characters of
415 an array when the first NULL is encountered. This is useful when large
416 arrays actually contain only short strings.
418 * Shared library breakpoints
420 In SunOS 4.x, SVR4, and Alpha OSF/1 configurations, you can now set
421 breakpoints in shared libraries before the executable is run.
423 * Hardware watchpoints
425 There is a new hardware breakpoint for the watch command for sparclite
426 targets. See gdb/sparclite/hw_breakpoint.note.
428 Hardware watchpoints are also now supported under Linux.
432 Annotations have been added. These are for use with graphical interfaces,
433 and are still experimental. Currently only gdba.el uses these.
435 * Improved Irix 5 support
437 GDB now works properly with Irix 5.2.
439 * Improved HPPA support
441 GDB now works properly with the latest GCC and GAS.
443 * New native configurations
445 Sequent PTX4 i[34]86-sequent-ptx4
446 HPPA running OSF/1 hppa*-*-osf*
447 Atari TT running SVR4 m68*-*-sysv4*
448 RS/6000 LynxOS rs6000-*-lynxos*
452 OS/9000 i[34]86-*-os9k
453 MIPS R4000 mips64*{,el}-*-{ecoff,elf}
456 * Hitachi SH7000 and E7000-PC ICE support
458 There is now support for communicating with the Hitachi E7000-PC ICE.
459 This is available automatically when GDB is configured for the SH.
463 As usual, a variety of small fixes and improvements, both generic
464 and configuration-specific. See the ChangeLog for more detail.
466 *** Changes in GDB-4.12:
468 * Irix 5 is now supported
472 GDB-4.12 on the HPPA has a number of changes which make it unable
473 to debug the output from the currently released versions of GCC and
474 GAS (GCC 2.5.8 and GAS-2.2 or PAGAS-1.36). Until the next major release
475 of GCC and GAS, versions of these tools designed to work with GDB-4.12
476 can be retrieved via anonymous ftp from jaguar.cs.utah.edu:/dist.
479 *** Changes in GDB-4.11:
481 * User visible changes:
485 The "set remotedebug" option is now consistent between the mips remote
486 target, remote targets using the gdb-specific protocol, UDI (AMD's
487 debug protocol for the 29k) and the 88k bug monitor. It is now an
488 integer specifying a debug level (normally 0 or 1, but 2 means more
489 debugging info for the mips target).
491 * DEC Alpha native support
493 GDB now works on the DEC Alpha. GCC 2.4.5 does not produce usable
494 debug info, but GDB works fairly well with the DEC compiler and should
495 work with a future GCC release. See the README file for a few
496 Alpha-specific notes.
498 * Preliminary thread implementation
500 GDB now has preliminary thread support for both SGI/Irix and LynxOS.
502 * LynxOS native and target support for 386
504 This release has been hosted on LynxOS 2.2, and also can be configured
505 to remotely debug programs running under LynxOS (see gdb/gdbserver/README
508 * Improvements in C++ mangling/demangling.
510 This release has much better g++ debugging, specifically in name
511 mangling/demangling, virtual function calls, print virtual table,
512 call methods, ...etc.
514 *** Changes in GDB-4.10:
516 * User visible changes:
518 Remote debugging using the GDB-specific (`target remote') protocol now
519 supports the `load' command. This is only useful if you have some
520 other way of getting the stub to the target system, and you can put it
521 somewhere in memory where it won't get clobbered by the download.
523 Filename completion now works.
525 When run under emacs mode, the "info line" command now causes the
526 arrow to point to the line specified. Also, "info line" prints
527 addresses in symbolic form (as well as hex).
529 All vxworks based targets now support a user settable option, called
530 vxworks-timeout. This option represents the number of seconds gdb
531 should wait for responses to rpc's. You might want to use this if
532 your vxworks target is, perhaps, a slow software simulator or happens
533 to be on the far side of a thin network line.
537 This release contains support for using a DEC alpha as a GDB host for
538 cross debugging. Native alpha debugging is not supported yet.
541 *** Changes in GDB-4.9:
545 This is the first GDB release which is accompanied by a matching testsuite.
546 The testsuite requires installation of dejagnu, which should be available
547 via ftp from most sites that carry GNU software.
551 'Cfront' style demangling has had its name changed to 'ARM' style, to
552 emphasize that it was written from the specifications in the C++ Annotated
553 Reference Manual, not necessarily to be compatible with AT&T cfront. Despite
554 disclaimers, it still generated too much confusion with users attempting to
555 use gdb with AT&T cfront.
559 GDB now uses a standard remote interface to a simulator library.
560 So far, the library contains simulators for the Zilog Z8001/2, the
561 Hitachi H8/300, H8/500 and Super-H.
563 * New targets supported
565 H8/300 simulator h8300-hitachi-hms or h8300hms
566 H8/500 simulator h8500-hitachi-hms or h8500hms
567 SH simulator sh-hitachi-hms or sh
568 Z8000 simulator z8k-zilog-none or z8ksim
569 IDT MIPS board over serial line mips-idt-ecoff
571 Cross-debugging to GO32 targets is supported. It requires a custom
572 version of the i386-stub.c module which is integrated with the
573 GO32 memory extender.
575 * New remote protocols
577 MIPS remote debugging protocol.
579 * New source languages supported
581 This version includes preliminary support for Chill, a Pascal like language
582 used by telecommunications companies. Chill support is also being integrated
583 into the GNU compiler, but we don't know when it will be publically available.
586 *** Changes in GDB-4.8:
588 * HP Precision Architecture supported
590 GDB now supports HP PA-RISC machines running HPUX. A preliminary
591 version of this support was available as a set of patches from the
592 University of Utah. GDB does not support debugging of programs
593 compiled with the HP compiler, because HP will not document their file
594 format. Instead, you must use GCC (version 2.3.2 or later) and PA-GAS
595 (as available from jaguar.cs.utah.edu:/dist/pa-gas.u4.tar.Z).
597 Many problems in the preliminary version have been fixed.
599 * Faster and better demangling
601 We have improved template demangling and fixed numerous bugs in the GNU style
602 demangler. It can now handle type modifiers such as `static' or `const'. Wide
603 character types (wchar_t) are now supported. Demangling of each symbol is now
604 only done once, and is cached when the symbol table for a file is read in.
605 This results in a small increase in memory usage for C programs, a moderate
606 increase in memory usage for C++ programs, and a fantastic speedup in
609 `Cfront' style demangling still doesn't work with AT&T cfront. It was written
610 from the specifications in the Annotated Reference Manual, which AT&T's
611 compiler does not actually implement.
613 * G++ multiple inheritance compiler problem
615 In the 2.3.2 release of gcc/g++, how the compiler resolves multiple
616 inheritance lattices was reworked to properly discover ambiguities. We
617 recently found an example which causes this new algorithm to fail in a
618 very subtle way, producing bad debug information for those classes.
619 The file 'gcc.patch' (in this directory) can be applied to gcc to
620 circumvent the problem. A future GCC release will contain a complete
623 The previous G++ debug info problem (mentioned below for the gdb-4.7
624 release) is fixed in gcc version 2.3.2.
626 * Improved configure script
628 The `configure' script will now attempt to guess your system type if
629 you don't supply a host system type. The old scheme of supplying a
630 host system triplet is preferable over using this. All the magic is
631 done in the new `config.guess' script. Examine it for details.
633 We have also brought our configure script much more in line with the FSF's
634 version. It now supports the --with-xxx options. In particular,
635 `--with-minimal-bfd' can be used to make the GDB binary image smaller.
636 The resulting GDB will not be able to read arbitrary object file formats --
637 only the format ``expected'' to be used on the configured target system.
638 We hope to make this the default in a future release.
640 * Documentation improvements
642 There's new internal documentation on how to modify GDB, and how to
643 produce clean changes to the code. We implore people to read it
644 before submitting changes.
646 The GDB manual uses new, sexy Texinfo conditionals, rather than arcane
647 M4 macros. The new texinfo.tex is provided in this release. Pre-built
648 `info' files are also provided. To build `info' files from scratch,
649 you will need the latest `makeinfo' release, which will be available in
650 a future texinfo-X.Y release.
652 *NOTE* The new texinfo.tex can cause old versions of TeX to hang.
653 We're not sure exactly which versions have this problem, but it has
654 been seen in 3.0. We highly recommend upgrading to TeX version 3.141
655 or better. If that isn't possible, there is a patch in
656 `texinfo/tex3patch' that will modify `texinfo/texinfo.tex' to work
661 GDB now supports array constants that can be used in expressions typed in by
662 the user. The syntax is `{element, element, ...}'. Ie: you can now type
663 `print {1, 2, 3}', and it will build up an array in memory malloc'd in
666 The new directory `gdb/sparclite' contains a program that demonstrates
667 how the sparc-stub.c remote stub runs on a Fujitsu SPARClite processor.
669 * New native hosts supported
671 HP/PA-RISC under HPUX using GNU tools hppa1.1-hp-hpux
672 386 CPUs running SCO Unix 3.2v4 i386-unknown-sco3.2v4
674 * New targets supported
676 AMD 29k family via UDI a29k-amd-udi or udi29k
678 * New file formats supported
680 BFD now supports reading HP/PA-RISC executables (SOM file format?),
681 HPUX core files, and SCO 3.2v2 core files.
685 Attaching to processes now works again; thanks for the many bug reports.
687 We have also stomped on a bunch of core dumps caused by
688 printf_filtered("%s") problems.
690 We eliminated a copyright problem on the rpc and ptrace header files
691 for VxWorks, which was discovered at the last minute during the 4.7
692 release. You should now be able to build a VxWorks GDB.
694 You can now interrupt gdb while an attached process is running. This
695 will cause the attached process to stop, and give control back to GDB.
697 We fixed problems caused by using too many file descriptors
698 for reading symbols from object files and libraries. This was
699 especially a problem for programs that used many (~100) shared
702 The `step' command now only enters a subroutine if there is line number
703 information for the subroutine. Otherwise it acts like the `next'
704 command. Previously, `step' would enter subroutines if there was
705 any debugging information about the routine. This avoids problems
706 when using `cc -g1' on MIPS machines.
708 * Internal improvements
710 GDB's internal interfaces have been improved to make it easier to support
711 debugging of multiple languages in the future.
713 GDB now uses a common structure for symbol information internally.
714 Minimal symbols (derived from linkage symbols in object files), partial
715 symbols (from a quick scan of debug information), and full symbols
716 contain a common subset of information, making it easier to write
717 shared code that handles any of them.
719 * New command line options
721 We now accept --silent as an alias for --quiet.
725 The memory-mapped-malloc library is now licensed under the GNU Library
726 General Public License.
728 *** Changes in GDB-4.7:
730 * Host/native/target split
732 GDB has had some major internal surgery to untangle the support for
733 hosts and remote targets. Now, when you configure GDB for a remote
734 target, it will no longer load in all of the support for debugging
735 local programs on the host. When fully completed and tested, this will
736 ensure that arbitrary host/target combinations are possible.
738 The primary conceptual shift is to separate the non-portable code in
739 GDB into three categories. Host specific code is required any time GDB
740 is compiled on that host, regardless of the target. Target specific
741 code relates to the peculiarities of the target, but can be compiled on
742 any host. Native specific code is everything else: it can only be
743 built when the host and target are the same system. Child process
744 handling and core file support are two common `native' examples.
746 GDB's use of /proc for controlling Unix child processes is now cleaner.
747 It has been split out into a single module under the `target_ops' vector,
748 plus two native-dependent functions for each system that uses /proc.
750 * New hosts supported
752 HP/Apollo 68k (under the BSD domain) m68k-apollo-bsd or apollo68bsd
753 386 CPUs running various BSD ports i386-unknown-bsd or 386bsd
754 386 CPUs running SCO Unix i386-unknown-scosysv322 or i386sco
756 * New targets supported
758 Fujitsu SPARClite sparclite-fujitsu-none or sparclite
759 68030 and CPU32 m68030-*-*, m68332-*-*
761 * New native hosts supported
763 386 CPUs running various BSD ports i386-unknown-bsd or 386bsd
764 (386bsd is not well tested yet)
765 386 CPUs running SCO Unix i386-unknown-scosysv322 or sco
767 * New file formats supported
769 BFD now supports COFF files for the Zilog Z8000 microprocessor. It
770 supports reading of `a.out.adobe' object files, which are an a.out
771 format extended with minimal information about multiple sections.
775 `show copying' is the same as the old `info copying'.
776 `show warranty' is the same as `info warrantee'.
777 These were renamed for consistency. The old commands continue to work.
779 `info handle' is a new alias for `info signals'.
781 You can now define pre-command hooks, which attach arbitrary command
782 scripts to any command. The commands in the hook will be executed
783 prior to the user's command. You can also create a hook which will be
784 executed whenever the program stops. See gdb.texinfo.
788 We now deal with Cfront style name mangling, and can even extract type
789 info from mangled symbols. GDB can automatically figure out which
790 symbol mangling style your C++ compiler uses.
792 Calling of methods and virtual functions has been improved as well.
796 The crash that occured when debugging Sun Ansi-C compiled binaries is
797 fixed. This was due to mishandling of the extra N_SO stabs output
800 We also finally got Ultrix 4.2 running in house, and fixed core file
801 support, with help from a dozen people on the net.
803 John M. Farrell discovered that the reason that single-stepping was so
804 slow on all of the Mips based platforms (primarily SGI and DEC) was
805 that we were trying to demangle and lookup a symbol used for internal
806 purposes on every instruction that was being stepped through. Changing
807 the name of that symbol so that it couldn't be mistaken for a C++
808 mangled symbol sped things up a great deal.
810 Rich Pixley sped up symbol lookups in general by getting much smarter
811 about when C++ symbol mangling is necessary. This should make symbol
812 completion (TAB on the command line) much faster. It's not as fast as
813 we'd like, but it's significantly faster than gdb-4.6.
817 A new user controllable variable 'call_scratch_address' can
818 specify the location of a scratch area to be used when GDB
819 calls a function in the target. This is necessary because the
820 usual method of putting the scratch area on the stack does not work
821 in systems that have separate instruction and data spaces.
823 We integrated changes to support the 29k UDI (Universal Debugger
824 Interface), but discovered at the last minute that we didn't have all
825 of the appropriate copyright paperwork. We are working with AMD to
826 resolve this, and hope to have it available soon.
830 We have sped up the remote serial line protocol, especially for targets
831 with lots of registers. It now supports a new `expedited status' ('T')
832 message which can be used in place of the existing 'S' status message.
833 This allows the remote stub to send only the registers that GDB
834 needs to make a quick decision about single-stepping or conditional
835 breakpoints, eliminating the need to fetch the entire register set for
836 each instruction being stepped through.
838 The GDB remote serial protocol now implements a write-through cache for
839 registers, only re-reading the registers if the target has run.
841 There is also a new remote serial stub for SPARC processors. You can
842 find it in gdb-4.7/gdb/sparc-stub.c. This was written to support the
843 Fujitsu SPARClite processor, but will run on any stand-alone SPARC
844 processor with a serial port.
848 Configure.in files have become much easier to read and modify. A new
849 `table driven' format makes it more obvious what configurations are
850 supported, and what files each one uses.
854 There is a new opcodes library which will eventually contain all of the
855 disassembly routines and opcode tables. At present, it only contains
856 Sparc and Z8000 routines. This will allow the assembler, debugger, and
857 disassembler (binutils/objdump) to share these routines.
859 The libiberty library is now copylefted under the GNU Library General
860 Public License. This allows more liberal use, and was done so libg++
861 can use it. This makes no difference to GDB, since the Library License
862 grants all the rights from the General Public License.
866 The file gdb-4.7/gdb/doc/stabs.texinfo is a (relatively) complete
867 reference to the stabs symbol info used by the debugger. It is (as far
868 as we know) the only published document on this fascinating topic. We
869 encourage you to read it, compare it to the stabs information on your
870 system, and send improvements on the document in general (to
871 bug-gdb@prep.ai.mit.edu).
873 And, of course, many bugs have been fixed.
876 *** Changes in GDB-4.6:
878 * Better support for C++ function names
880 GDB now accepts as input the "demangled form" of C++ overloaded function
881 names and member function names, and can do command completion on such names
882 (using TAB, TAB-TAB, and ESC-?). The names have to be quoted with a pair of
883 single quotes. Examples are 'func (int, long)' and 'obj::operator==(obj&)'.
884 Make use of command completion, it is your friend.
886 GDB also now accepts a variety of C++ mangled symbol formats. They are
887 the GNU g++ style, the Cfront (ARM) style, and the Lucid (lcc) style.
888 You can tell GDB which format to use by doing a 'set demangle-style {gnu,
889 lucid, cfront, auto}'. 'gnu' is the default. Do a 'set demangle-style foo'
890 for the list of formats.
892 * G++ symbol mangling problem
894 Recent versions of gcc have a bug in how they emit debugging information for
895 C++ methods (when using dbx-style stabs). The file 'gcc.patch' (in this
896 directory) can be applied to gcc to fix the problem. Alternatively, if you
897 can't fix gcc, you can #define GCC_MANGLE_BUG when compling gdb/symtab.c. The
898 usual symptom is difficulty with setting breakpoints on methods. GDB complains
899 about the method being non-existent. (We believe that version 2.2.2 of GCC has
902 * New 'maintenance' command
904 All of the commands related to hacking GDB internals have been moved out of
905 the main command set, and now live behind the 'maintenance' command. This
906 can also be abbreviated as 'mt'. The following changes were made:
908 dump-me -> maintenance dump-me
909 info all-breakpoints -> maintenance info breakpoints
910 printmsyms -> maintenance print msyms
911 printobjfiles -> maintenance print objfiles
912 printpsyms -> maintenance print psymbols
913 printsyms -> maintenance print symbols
915 The following commands are new:
917 maintenance demangle Call internal GDB demangler routine to
918 demangle a C++ link name and prints the result.
919 maintenance print type Print a type chain for a given symbol
921 * Change to .gdbinit file processing
923 We now read the $HOME/.gdbinit file before processing the argv arguments
924 (e.g. reading symbol files or core files). This allows global parameters to
925 be set, which will apply during the symbol reading. The ./.gdbinit is still
926 read after argv processing.
928 * New hosts supported
930 Solaris-2.0 !!! sparc-sun-solaris2 or sun4sol2
932 Linux support i386-unknown-linux or linux
934 We are also including code to support the HP/PA running BSD and HPUX. This
935 is almost guaranteed not to work, as we didn't have time to test or build it
936 for this release. We are including it so that the more adventurous (or
937 masochistic) of you can play with it. We also had major problems with the
938 fact that the compiler that we got from HP doesn't support the -g option.
941 * New targets supported
943 Hitachi H8/300 h8300-hitachi-hms or h8300hms
945 * More smarts about finding #include files
947 GDB now remembers the compilation directory for all include files, and for
948 all files from which C is generated (like yacc and lex sources). This
949 greatly improves GDB's ability to find yacc/lex sources, and include files,
950 especially if you are debugging your program from a directory different from
951 the one that contains your sources.
953 We also fixed a bug which caused difficulty with listing and setting
954 breakpoints in include files which contain C code. (In the past, you had to
955 try twice in order to list an include file that you hadn't looked at before.)
957 * Interesting infernals change
959 GDB now deals with arbitrary numbers of sections, where the symbols for each
960 section must be relocated relative to that section's landing place in the
961 target's address space. This work was needed to support ELF with embedded
962 stabs used by Solaris-2.0.
964 * Bug fixes (of course!)
966 There have been loads of fixes for the following things:
967 mips, rs6000, 29k/udi, m68k, g++, type handling, elf/dwarf, m88k,
968 i960, stabs, DOS(GO32), procfs, etc...
970 See the ChangeLog for details.
972 *** Changes in GDB-4.5:
974 * New machines supported (host and target)
976 IBM RS6000 running AIX rs6000-ibm-aix or rs6000
978 SGI Irix-4.x mips-sgi-irix4 or iris4
982 GDB now uses a new memory manager called mmalloc, based on gmalloc.
983 Mmalloc is capable of handling mutiple heaps of memory. It is also
984 capable of saving a heap to a file, and then mapping it back in later.
985 This can be used to greatly speedup the startup of GDB by using a
986 pre-parsed symbol table which lives in a mmalloc managed heap. For
987 more details, please read mmalloc/mmalloc.texi.
991 The 'info proc' command (SVR4 only) has been enhanced quite a bit. See
992 'help info proc' for details.
994 * MIPS ecoff symbol table format
996 The code that reads MIPS symbol table format is now supported on all hosts.
997 Thanks to MIPS for releasing the sym.h and symconst.h files to make this
1000 * File name changes for MS-DOS
1002 Many files in the config directories have been renamed to make it easier to
1003 support GDB on MS-DOSe systems (which have very restrictive file name
1004 conventions :-( ). MS-DOSe host support (under DJ Delorie's GO32
1005 environment) is close to working but has some remaining problems. Note
1006 that debugging of DOS programs is not supported, due to limitations
1007 in the ``operating system'', but it can be used to host cross-debugging.
1009 * Cross byte order fixes
1011 Many fixes have been made to support cross debugging of Sparc and MIPS
1012 targets from hosts whose byte order differs.
1014 * New -mapped and -readnow options
1016 If memory-mapped files are available on your system through the 'mmap'
1017 system call, you can use the -mapped option on the `file' or
1018 `symbol-file' commands to cause GDB to write the symbols from your
1019 program into a reusable file. If the program you are debugging is
1020 called `/path/fred', the mapped symbol file will be `./fred.syms'.
1021 Future GDB debugging sessions will notice the presence of this file,
1022 and will quickly map in symbol information from it, rather than reading
1023 the symbol table from the executable program. Using the '-mapped'
1024 option in a GDB `file' or `symbol-file' command has the same effect as
1025 starting GDB with the '-mapped' command-line option.
1027 You can cause GDB to read the entire symbol table immediately by using
1028 the '-readnow' option with any of the commands that load symbol table
1029 information (or on the GDB command line). This makes the command
1030 slower, but makes future operations faster.
1032 The -mapped and -readnow options are typically combined in order to
1033 build a `fred.syms' file that contains complete symbol information.
1034 A simple GDB invocation to do nothing but build a `.syms' file for future
1037 gdb -batch -nx -mapped -readnow programname
1039 The `.syms' file is specific to the host machine on which GDB is run.
1040 It holds an exact image of GDB's internal symbol table. It cannot be
1041 shared across multiple host platforms.
1043 * longjmp() handling
1045 GDB is now capable of stepping and nexting over longjmp(), _longjmp(), and
1046 siglongjmp() without losing control. This feature has not yet been ported to
1047 all systems. It currently works on many 386 platforms, all MIPS-based
1048 platforms (SGI, DECstation, etc), and Sun3/4.
1052 Preliminary work has been put in to support the new Solaris OS from Sun. At
1053 this time, it can control and debug processes, but it is not capable of
1058 As always, many many bug fixes. The major areas were with g++, and mipsread.
1059 People using the MIPS-based platforms should experience fewer mysterious
1060 crashes and trashed symbol tables.
1062 *** Changes in GDB-4.4:
1064 * New machines supported (host and target)
1066 SCO Unix on i386 IBM PC clones i386-sco-sysv or i386sco
1068 BSD Reno on Vax vax-dec-bsd
1069 Ultrix on Vax vax-dec-ultrix
1071 * New machines supported (target)
1073 AMD 29000 embedded, using EBMON a29k-none-none
1077 GDB continues to improve its handling of C++. `References' work better.
1078 The demangler has also been improved, and now deals with symbols mangled as
1079 per the Annotated C++ Reference Guide.
1081 GDB also now handles `stabs' symbol information embedded in MIPS
1082 `ecoff' symbol tables. Since the ecoff format was not easily
1083 extensible to handle new languages such as C++, this appeared to be a
1084 good way to put C++ debugging info into MIPS binaries. This option
1085 will be supported in the GNU C compiler, version 2, when it is
1088 * New features for SVR4
1090 GDB now handles SVR4 shared libraries, in the same fashion as SunOS
1091 shared libraries. Debugging dynamically linked programs should present
1092 only minor differences from debugging statically linked programs.
1094 The `info proc' command will print out information about any process
1095 on an SVR4 system (including the one you are debugging). At the moment,
1096 it prints the address mappings of the process.
1098 If you bring up GDB on another SVR4 system, please send mail to
1099 bug-gdb@prep.ai.mit.edu to let us know what changes were reqired (if any).
1101 * Better dynamic linking support in SunOS
1103 Reading symbols from shared libraries which contain debugging symbols
1104 now works properly. However, there remain issues such as automatic
1105 skipping of `transfer vector' code during function calls, which
1106 make it harder to debug code in a shared library, than to debug the
1107 same code linked statically.
1111 GDB is now using the latest `getopt' routines from the FSF. This
1112 version accepts the -- prefix for options with long names. GDB will
1113 continue to accept the old forms (-option and +option) as well.
1114 Various single letter abbreviations for options have been explicity
1115 added to the option table so that they won't get overshadowed in the
1116 future by other options that begin with the same letter.
1120 The `cleanup_undefined_types' bug that many of you noticed has been squashed.
1121 Many assorted bugs have been handled. Many more remain to be handled.
1122 See the various ChangeLog files (primarily in gdb and bfd) for details.
1125 *** Changes in GDB-4.3:
1127 * New machines supported (host and target)
1129 Amiga 3000 running Amix m68k-cbm-svr4 or amix
1130 NCR 3000 386 running SVR4 i386-ncr-svr4 or ncr3000
1131 Motorola Delta 88000 running Sys V m88k-motorola-sysv or delta88
1133 * Almost SCO Unix support
1135 We had hoped to support:
1136 SCO Unix on i386 IBM PC clones i386-sco-sysv or i386sco
1137 (except for core file support), but we discovered very late in the release
1138 that it has problems with process groups that render gdb unusable. Sorry
1139 about that. I encourage people to fix it and post the fixes.
1141 * Preliminary ELF and DWARF support
1143 GDB can read ELF object files on System V Release 4, and can handle
1144 debugging records for C, in DWARF format, in ELF files. This support
1145 is preliminary. If you bring up GDB on another SVR4 system, please
1146 send mail to bug-gdb@prep.ai.mit.edu to let us know what changes were
1151 GDB now uses the latest `readline' library. One user-visible change
1152 is that two tabs will list possible command completions, which previously
1153 required typing M-? (meta-question mark, or ESC ?).
1157 The `stepi' bug that many of you noticed has been squashed.
1158 Many bugs in C++ have been handled. Many more remain to be handled.
1159 See the various ChangeLog files (primarily in gdb and bfd) for details.
1161 * State of the MIPS world (in case you wondered):
1163 GDB can understand the symbol tables emitted by the compilers
1164 supplied by most vendors of MIPS-based machines, including DEC. These
1165 symbol tables are in a format that essentially nobody else uses.
1167 Some versions of gcc come with an assembler post-processor called
1168 mips-tfile. This program is required if you want to do source-level
1169 debugging of gcc-compiled programs. I believe FSF does not ship
1170 mips-tfile with gcc version 1, but it will eventually come with gcc
1173 Debugging of g++ output remains a problem. g++ version 1.xx does not
1174 really support it at all. (If you're lucky, you should be able to get
1175 line numbers and stack traces to work, but no parameters or local
1176 variables.) With some work it should be possible to improve the
1179 When gcc version 2 is released, you will have somewhat better luck.
1180 However, even then you will get confusing results for inheritance and
1183 We will eventually provide full debugging of g++ output on
1184 DECstations. This will probably involve some kind of stabs-in-ecoff
1185 encapulation, but the details have not been worked out yet.
1188 *** Changes in GDB-4.2:
1190 * Improved configuration
1192 Only one copy of `configure' exists now, and it is not self-modifying.
1193 Porting BFD is simpler.
1197 The `step' and `next' commands now only stop at the first instruction
1198 of a source line. This prevents the multiple stops that used to occur
1199 in switch statements, for-loops, etc. `Step' continues to stop if a
1200 function that has debugging information is called within the line.
1204 Lots of small bugs fixed. More remain.
1206 * New host supported (not target)
1208 Intel 386 PC clone running Mach i386-none-mach
1211 *** Changes in GDB-4.1:
1213 * Multiple source language support
1215 GDB now has internal scaffolding to handle several source languages.
1216 It determines the type of each source file from its filename extension,
1217 and will switch expression parsing and number formatting to match the
1218 language of the function in the currently selected stack frame.
1219 You can also specifically set the language to be used, with
1220 `set language c' or `set language modula-2'.
1224 GDB now has preliminary support for the GNU Modula-2 compiler,
1225 currently under development at the State University of New York at
1226 Buffalo. Development of both GDB and the GNU Modula-2 compiler will
1227 continue through the fall of 1991 and into 1992.
1229 Other Modula-2 compilers are currently not supported, and attempting to
1230 debug programs compiled with them will likely result in an error as the
1231 symbol table is read. Feel free to work on it, though!
1233 There are hooks in GDB for strict type checking and range checking,
1234 in the `Modula-2 philosophy', but they do not currently work.
1238 GDB can now write to executable and core files (e.g. patch
1239 a variable's value). You must turn this switch on, specify
1240 the file ("exec foo" or "core foo"), *then* modify it, e.g.
1241 by assigning a new value to a variable. Modifications take
1244 * Automatic SunOS shared library reading
1246 When you run your program, GDB automatically determines where its
1247 shared libraries (if any) have been loaded, and reads their symbols.
1248 The `share' command is no longer needed. This also works when
1249 examining core files.
1253 You can specify the number of lines that the `list' command shows.
1256 * New machines supported (host and target)
1258 SGI Iris (MIPS) running Irix V3: mips-sgi-irix or iris
1259 Sony NEWS (68K) running NEWSOS 3.x: m68k-sony-sysv or news
1260 Ultracomputer (29K) running Sym1: a29k-nyu-sym1 or ultra3
1262 * New hosts supported (not targets)
1264 IBM RT/PC: romp-ibm-aix or rtpc
1266 * New targets supported (not hosts)
1268 AMD 29000 embedded with COFF a29k-none-coff
1269 AMD 29000 embedded with a.out a29k-none-aout
1270 Ultracomputer remote kernel debug a29k-nyu-kern
1272 * New remote interfaces
1278 *** Changes in GDB-4.0:
1282 Wide output is wrapped at good places to make the output more readable.
1284 Gdb now supports cross-debugging from a host machine of one type to a
1285 target machine of another type. Communication with the target system
1286 is over serial lines. The ``target'' command handles connecting to the
1287 remote system; the ``load'' command will download a program into the
1288 remote system. Serial stubs for the m68k and i386 are provided. Gdb
1289 also supports debugging of realtime processes running under VxWorks,
1290 using SunRPC Remote Procedure Calls over TCP/IP to talk to a debugger
1291 stub on the target system.
1293 New CPUs supported include the AMD 29000 and Intel 960.
1295 GDB now reads object files and symbol tables via a ``binary file''
1296 library, which allows a single copy of GDB to debug programs of multiple
1297 object file types such as a.out and coff.
1299 There is now a GDB reference card in "doc/refcard.tex". (Make targets
1300 refcard.dvi and refcard.ps are available to format it).
1303 * Control-Variable user interface simplified
1305 All variables that control the operation of the debugger can be set
1306 by the ``set'' command, and displayed by the ``show'' command.
1308 For example, ``set prompt new-gdb=>'' will change your prompt to new-gdb=>.
1309 ``Show prompt'' produces the response:
1310 Gdb's prompt is new-gdb=>.
1312 What follows are the NEW set commands. The command ``help set'' will
1313 print a complete list of old and new set commands. ``help set FOO''
1314 will give a longer description of the variable FOO. ``show'' will show
1315 all of the variable descriptions and their current settings.
1317 confirm on/off: Enables warning questions for operations that are
1318 hard to recover from, e.g. rerunning the program while
1319 it is already running. Default is ON.
1321 editing on/off: Enables EMACS style command line editing
1322 of input. Previous lines can be recalled with
1323 control-P, the current line can be edited with control-B,
1324 you can search for commands with control-R, etc.
1327 history filename NAME: NAME is where the gdb command history
1328 will be stored. The default is .gdb_history,
1329 or the value of the environment variable
1332 history size N: The size, in commands, of the command history. The
1333 default is 256, or the value of the environment variable
1336 history save on/off: If this value is set to ON, the history file will
1337 be saved after exiting gdb. If set to OFF, the
1338 file will not be saved. The default is OFF.
1340 history expansion on/off: If this value is set to ON, then csh-like
1341 history expansion will be performed on
1342 command line input. The default is OFF.
1344 radix N: Sets the default radix for input and output. It can be set
1345 to 8, 10, or 16. Note that the argument to "radix" is interpreted
1346 in the current radix, so "set radix 10" is always a no-op.
1348 height N: This integer value is the number of lines on a page. Default
1349 is 24, the current `stty rows'' setting, or the ``li#''
1350 setting from the termcap entry matching the environment
1353 width N: This integer value is the number of characters on a line.
1354 Default is 80, the current `stty cols'' setting, or the ``co#''
1355 setting from the termcap entry matching the environment
1358 Note: ``set screensize'' is obsolete. Use ``set height'' and
1359 ``set width'' instead.
1361 print address on/off: Print memory addresses in various command displays,
1362 such as stack traces and structure values. Gdb looks
1363 more ``symbolic'' if you turn this off; it looks more
1364 ``machine level'' with it on. Default is ON.
1366 print array on/off: Prettyprint arrays. New convenient format! Default
1369 print demangle on/off: Print C++ symbols in "source" form if on,
1372 print asm-demangle on/off: Same, for assembler level printouts
1375 print vtbl on/off: Prettyprint C++ virtual function tables. Default is OFF.
1378 * Support for Epoch Environment.
1380 The epoch environment is a version of Emacs v18 with windowing. One
1381 new command, ``inspect'', is identical to ``print'', except that if you
1382 are running in the epoch environment, the value is printed in its own
1386 * Support for Shared Libraries
1388 GDB can now debug programs and core files that use SunOS shared libraries.
1389 Symbols from a shared library cannot be referenced
1390 before the shared library has been linked with the program (this
1391 happens after you type ``run'' and before the function main() is entered).
1392 At any time after this linking (including when examining core files
1393 from dynamically linked programs), gdb reads the symbols from each
1394 shared library when you type the ``sharedlibrary'' command.
1395 It can be abbreviated ``share''.
1397 sharedlibrary REGEXP: Load shared object library symbols for files
1398 matching a unix regular expression. No argument
1399 indicates to load symbols for all shared libraries.
1401 info sharedlibrary: Status of loaded shared libraries.
1406 A watchpoint stops execution of a program whenever the value of an
1407 expression changes. Checking for this slows down execution
1408 tremendously whenever you are in the scope of the expression, but is
1409 quite useful for catching tough ``bit-spreader'' or pointer misuse
1410 problems. Some machines such as the 386 have hardware for doing this
1411 more quickly, and future versions of gdb will use this hardware.
1413 watch EXP: Set a watchpoint (breakpoint) for an expression.
1415 info watchpoints: Information about your watchpoints.
1417 delete N: Deletes watchpoint number N (same as breakpoints).
1418 disable N: Temporarily turns off watchpoint number N (same as breakpoints).
1419 enable N: Re-enables watchpoint number N (same as breakpoints).
1422 * C++ multiple inheritance
1424 When used with a GCC version 2 compiler, GDB supports multiple inheritance
1427 * C++ exception handling
1429 Gdb now supports limited C++ exception handling. Besides the existing
1430 ability to breakpoint on an exception handler, gdb can breakpoint on
1431 the raising of an exception (before the stack is peeled back to the
1434 catch FOO: If there is a FOO exception handler in the dynamic scope,
1435 set a breakpoint to catch exceptions which may be raised there.
1436 Multiple exceptions (``catch foo bar baz'') may be caught.
1438 info catch: Lists all exceptions which may be caught in the
1439 current stack frame.
1442 * Minor command changes
1444 The command ``call func (arg, arg, ...)'' now acts like the print
1445 command, except it does not print or save a value if the function's result
1446 is void. This is similar to dbx usage.
1448 The ``up'' and ``down'' commands now always print the frame they end up
1449 at; ``up-silently'' and `down-silently'' can be used in scripts to change
1450 frames without printing.
1452 * New directory command
1454 'dir' now adds directories to the FRONT of the source search path.
1455 The path starts off empty. Source files that contain debug information
1456 about the directory in which they were compiled can be found even
1457 with an empty path; Sun CC and GCC include this information. If GDB can't
1458 find your source file in the current directory, type "dir .".
1460 * Configuring GDB for compilation
1462 For normal use, type ``./configure host''. See README or gdb.texinfo
1465 GDB now handles cross debugging. If you are remotely debugging between
1466 two different machines, type ``./configure host -target=targ''.
1467 Host is the machine where GDB will run; targ is the machine
1468 where the program that you are debugging will run.
projects / platform / upstream / binutils.git / blob