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From: pavenis AT lanet DOT lv
To: "Eli Zaretskii" <eliz AT is DOT elta DOT co DOT il>, djgpp-workers AT delorie DOT com
Date: Fri, 1 Feb 2002 14:50:57 +0200
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Subject: Re: gcc-3.X: -gdwarf-2 breaks C++ exceptions for DJGPP
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On 1 Feb 2002 at 14:35, Eli Zaretskii wrote:

> > From: pavenis AT lanet DOT lv
> > Date: Fri, 1 Feb 2002 13:03:09 +0200
> > 
> > There seems to be possible workaround for this problem without reverting this 
> > change
> > by adding definition of DWARF_FRAME_REGNUM which is by default defined to 
> > DBX_REGISTER_NUMBER:
> > 
> > #undef DBX_REGISTER_NUMBER
> > #define DBX_REGISTER_NUMBER(n) \
> >   ((write_symbols == DWARF2_DEBUG) ? svr4_dbx_register_map[n] : 
> > dbx_register_map[n])
> > 
> > #undef DWARF_FRAME_REGNUM
> > #define DWARF_FRAME_REGNUM(n) dbx_register_map[n]
> 
> Will this require changes in GDB, or does it still work with GDB 5.1?

It seems that redefining DWARF_FRAME_REGNUM only influences
output of EH frame section, but not output of debug info. So 
I hope it should not break debugging.

gcc-3.0.4 20020131 binaries are at http://www.ltn.lv/~pavenis/gcctest.html
(C++ exceptions works with DWARF2 debug info with these binaries), so You can 
test whether there are some side effects of this change

Andris





I hope it will not require changes in GDB

I haven't seriously tested yet.