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Re: [RFC] Decimal Floating Point support for GDB (Part 1: patch)
- From: Wu Zhou <woodzltc at cn dot ibm dot com>
- To: Eli Zaretskii <eliz at gnu dot org>
- Cc: gdb-patches at sources dot redhat dot com
- Date: Thu, 29 Sep 2005 01:14:14 -0400
- Subject: Re: [RFC] Decimal Floating Point support for GDB (Part 1: patch)
Thanks for your reply.
Quoting Eli Zaretskii <email@example.com>:
> I'm not sure; the similar "1234.565f" feature is not documented
> anywhere. I guess the idea is that a programmer in the C language
> should know about this C feature, and GDB just supports the C language
> by accepting its syntax for numbers. Isn't the same true for your
> additions, i.e., isn't "1234.56df" going to be a valid C number
Yes. "1234.56df" will be valid number in incoming c99 revison. This is
documented in http://www.open-std.org/jtc1/sc22/wg14/www/docs/n1107.htm
> > What about gdb internal? Do we need to update that too?
> gdbint.texinfo should have a description of language-specific files,
> what they do and how to build one for a new language. One minor issue
> that should be part of that description is the number syntax. I'd be
> thrilled to see such a description added to gdbint, but since there's
> no such description now, I don't feel I can ask you to write a tiny
> addition to a non-existent chapter. But if you can find time to write
> a full description of the C expression syntax support, I'd gratefully
> review it.
OK. Got it. I will try to see whether I can find any time to work on
that. But I am not sure. So I can't promise anything at this time. :-)
> > 2. As you might know, dfp for gcc is also under development. And my patch
> > depends on the availablity of that? How did gdb handle this kind of
> > situation before? Did we need to wait until dfp is ready for gcc?
> There's no need to wait, IMHO, since this feature in GDB will not
> cause any harm unless and until GDB sees some program whose DWARF info
> includes these special tags.
That is good. I wish it is like this too.
- Wu Zhou