site_archiver@lists.apple.com Delivered-To: darwin-dev@lists.apple.com I have not done a lot of two machine debugging so I could be wrong, but I think you can just run the linux gdb on the linux machine and connect to the OS X machine. -- Jerry Pendergraft jerry.pendergraft@endocardial.com Endocardial Solutions voice: 651-523-6935 1350 Energy Lane, Suite 110 fax: 651-644-7897 St Paul, MN 55108-5254 mobile: 651-491-0163 On Sun, 12 Dec 2004, Michael D. Crawford wrote:

I need to build Apple's GDB on Linux so I can use the two-machine debugger on an IOKit driver I'm developing. I have two OS X Macs, but the ethernet port on one is busted, and there's no time to get it repaired, so I need to be able to debug from Linux. My linux box is a debian sarge system.

I'm following the instructions on a page called "Using non-Darwin systems as Darwin/Mac OS X kernel debugging hosts" at:

http://pknet.com/~joe/apple-cross-gdb.html

What the page says to do is to start with Apple's gdb-292 code, replace the mmalloc directory in 292 with the one from the release gdb-53 kernel, and apply a small patch. When I try that, almost everything works except Apple's dwarf2read.c won't compile. I don't understand what the error messages mean, and I don't understand the source code at the lines that gcc complains about. It's a bunch of stuff with macros that I haven't been able to figure out yet.

I can build gdb-53 on linux with no trouble. I can build gdb-292 on OS X with no trouble. The functions in question seem identical between both versions, but I can't replace Apple's dwarf2read.c with the stock one because they are otherwise quite different.

Here are the errors I get. If you can even tell me what they mean that would be a big help:

gcc -c -g -O2 -DTARGET_POWERPC -I./macosx -I. -I. -I./config -DLOCALEDIR="\"/usr/local/share/locale\"" -DHAVE_CONFIG_H -I./../include/opcode -I./../readline/.. -I../bfd -I./../bfd -I./../include -I../intl -I./../intl -DMI_OUT=1 -Wimplicit -Wreturn-type -Wcomment -Wtrigraphs -Wformat -Wparentheses -Wpointer-arith -Wuninitialized dwarf2read.c dwarf2read.c: In function `dwarf2_attach_fields_to_type': dwarf2read.c:2225: error: assignment of read-only member `private_field_bits' dwarf2read.c:2229: error: assignment of read-only member `protected_field_bits' dwarf2read.c:2233: error: assignment of read-only member `ignore_field_bits' dwarf2read.c:2246: error: assignment of read-only member `virtual_field_bits' dwarf2read.c:2248: error: assignment of read-only member `n_baseclasses' dwarf2read.c: In function `dwarf2_attach_fn_fields_to_type': dwarf2read.c:2445: error: assignment of read-only member `fn_fieldlists' dwarf2read.c:2463: error: assignment of read-only member `nfn_fields' dwarf2read.c:2464: error: assignment of read-only member `nfn_fields_total' make: *** [dwarf2read.o] Error 1

dwarf2read.c is unpatched - it's identical to Apple's stock 292 file, but something about trying to compile it under Debian sarge seems to break something.

If I'm able to get this to work, I expect I could later provide binary packages for others to use.

Thanks for your help,

Michael D. Crawford crawford@goingware.com

Read "GoingWare's Bag of Programming Tricks" at: http://www.goingware.com/tips/

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