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Re: [avr-libc-dev] [RFC] sections stub patch
From: |
Joerg Wunsch |
Subject: |
Re: [avr-libc-dev] [RFC] sections stub patch |
Date: |
Thu, 29 Aug 2002 22:50:27 +0200 |
User-agent: |
Mutt/1.2.5i |
As Theodore A. Roth wrote:
> Just try the attached patch. You should not need the 3.0.4 patch. I don't
> think I was being very clear with that.
It was clear to me after looking at both of them. ;-)
> I just compiled and installed with the patch with no problem, but I don't
> have any C++ code to test it.
The patch makes sense to me, also after reading the description of the
respective compiler options. Basically, it disables those parts of C++
by default that are currently unavailable for the AVR target (or that
don't seem to make sense at all due to space constraints).
I'm attaching a simple C++ test file. The code doesn't do very much and
of course is far away from being a real project, but it contains about
everything that is needed to verify constructors and destructors of an
object (including a global one). It's impressive to me that the compiler
can even eliminate the explicit call to the constructor routine in the
-O2 case (just compile it with -S and see the function _ZN6simpleC1Ei
go away). I tried compiling it on the IA32 platform (by declaring an
imaginary external function itoa(int, char *, int) on top), the
optimization there looks a lot worse considering that the AVR is an
8-bit machine where a lot of data movement is needed. But OK, IA32
suffers from lack of available registers.
Ted, maybe you could run it through the simulator. I still didn't
manage it to also produce FreeBSD ports for avrsim and avr-gdb.
--
J"org Wunsch Unix support engineer
address@hidden http://www.interface-systems.de/~j/
simpleclass.C
Description: Text document
- [avr-libc-dev] [RFC] sections stub patch, Theodore A. Roth, 2002/08/27
- Re: [avr-libc-dev] [RFC] sections stub patch, Joerg Wunsch, 2002/08/28
- Re: [avr-libc-dev] [RFC] sections stub patch, Theodore A. Roth, 2002/08/28
- Re: [avr-libc-dev] [RFC] sections stub patch, Joerg Wunsch, 2002/08/28
- Re: [avr-libc-dev] [RFC] sections stub patch, Theodore A. Roth, 2002/08/28
- Re: [avr-libc-dev] [RFC] sections stub patch, Joerg Wunsch, 2002/08/28
- Re: [avr-libc-dev] [RFC] sections stub patch, Theodore A. Roth, 2002/08/28
- Re: [avr-libc-dev] [RFC] sections stub patch, Joerg Wunsch, 2002/08/28
- Re: [avr-libc-dev] [RFC] sections stub patch, Theodore A. Roth, 2002/08/28
- Re: [avr-libc-dev] [RFC] sections stub patch,
Joerg Wunsch <=
- Re: [avr-libc-dev] [RFC] sections stub patch, Theodore A. Roth, 2002/08/29