multi-arch debug doesn't dump definitions as requested

[Andrew Cagney]

> According to
> http://sources.redhat.com/gdb/papers/multi-arch/howto.html
> 
> Rebuild and then run GDB vis: 
> 
> 	gdb/gdb
> 	(gdb)
> 	(gdb) set archdebug 1
> 	(gdb) file x-y-z
> 	....
> 
> 	If all goes well, gdb will report the current value of all the
> 	architecture dependent macro's. At this stage must are still 
> 	being taken from hardwired definitions in your
> 	tm-XXX.h file. Failing that, an internal error message 
> 	reporting an uninitialised architecture vector member will be
> 	reported. 
> 
> Except that that doesn't happen.  All I get is
> 
> 	(gdb) set archdebug 1
> 	Warning: command 'set archdebug' is deprecated.
> 	Use 'set debug arch'.
> 
> 	(gdb) file gdb
> 	gdbarch_update: info.bfd_arch_info arm
> 	gdbarch_update: info.byte_order 1 (little)
> 	gdbarch_update: info.abfd 0x1d2e00
> 	gdbarch_update: info.tdep_info 0x0
> 	gdbarch_update: Architecture 0x001d3000 (arm) unchanged
> 	Reading symbols from gdb...done.
> 
> Note, "set debug arch 1" doesn't do anything different either.
> 
> How about a "maint" (or maint info) command?


Try:

(gdb) maint print architecture [ <savefile> ]

and look at sizeof.exp.

The lack of output comes, at least in part, because it isn't possible to 
print the macros/values safely.

Andrew