From: Jim Ingham <jingham@apple.com>
To: Mark Kettenis <mark.kettenis@xs4all.nl>
Cc: gdb@sourceware.org
Subject: Re: [RFC] The never ending 32-bit vs. 64-bit blues
Date: Mon, 07 Nov 2005 22:50:00 -0000 [thread overview]
Message-ID: <6324540E-2A63-412D-99AA-04E99054A2A9@apple.com> (raw)
In-Reply-To: <200511072245.jA7MjnIL005849@elgar.sibelius.xs4all.nl>
Just as a point of information, Apple's PPC gdb (built 32 bit) can
debug both 32 and 64 bit PPC apps. We have a 32 bit native gdb with
a 32 bit and a 64 bit gdbarch. Seems to work okay so far.
Jim
On Nov 7, 2005, at 2:45 PM, Mark Kettenis wrote:
> In the past we have had a lot of bug reports from people trying to
> debug 64-bit programs with a native 32-bit gdb. As far as I know we
> don't support any native configuration that allows this. I've never
> quite managed to come up with a satisfactory solution to deal with
> this. Here's an attempt to deal with it by making configure complain.
>
> Any opinions about this?
>
> Mark
>
>
> Index: configure.ac
> ===================================================================
> RCS file: /cvs/src/src/gdb/configure.ac,v
> retrieving revision 1.24
> diff -u -p -r1.24 configure.ac
> --- configure.ac 25 Jul 2005 15:08:40 -0000 1.24
> +++ configure.ac 7 Nov 2005 22:34:19 -0000
> @@ -34,6 +34,19 @@ AM_PROG_CC_STDC
> AC_CONFIG_AUX_DIR(`cd $srcdir;pwd`/..)
> AC_CANONICAL_SYSTEM
>
> +# Sanity check; refuse to build a native GDB for a 64-bit target with
> +# a 32-bit compiler.
> +AC_CHECK_SIZEOF(void *)
> +if test "${target}" = "${host}"; then
> + case "$host_cpu" in
> + hppa64|mips64*|powerpc64|sparc64|x86_64)
> + if test $ac_cv_sizeof_void_p != 8; then
> + AC_MSG_ERROR(
> +[building native target ${host} with a 32-bit compiler is not
> supported])
> + fi
> + esac
> +fi
> +
> dnl List of object files and targets accumulated by configure.
>
> CONFIG_OBS=
>
next prev parent reply other threads:[~2005-11-07 22:50 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-11-07 22:45 Mark Kettenis
2005-11-07 22:50 ` Jim Ingham [this message]
2005-11-07 22:52 ` David Lecomber
2005-11-07 22:59 ` Daniel Jacobowitz
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