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Re: [avr-chat] only initialized variables can be placed into program mem
From: |
Rick Mann |
Subject: |
Re: [avr-chat] only initialized variables can be placed into program memory area |
Date: |
Mon, 2 Jul 2012 01:53:27 -0700 |
Hey Dave!
Thanks. I see it appears fixed in GCC 4.6, but CrossPack AVR doesn't include
that yet. (Sadly, GCC 4.5 broke some inline asm I was using). Anyway, I'll try
the workaround. Perhaps AVR libc should be modified, too?
--
Rick
On Jul 2, 2012, at 0:14 , David A. Lyons wrote:
> This is the C++ workaround I've been using:
>
> // PROGMEM workaround for C++ bogus-warning bug in avr-gcc:
> // <http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34734>
> //
> <http://www.avrfreaks.net/index.php?name=PNphpBB2&file=viewtopic&t=100009>
> //
> #define PROG_MEM
> __attribute__((section(".progmem.mydata")))
>
> ...and then use PROG_MEM where I would have used PROGMEM.
>
> Cheers,
>
> --Dave
>
> On Jul 1, 2012, at 8:49 PM, Rick Mann <address@hidden> wrote:
>
>> Also: this is a .cpp file. I found some of the AVR Freaks thread. They say
>> it's a known problem in GCC C++. Sigh.
>>
>> --
>> Rick
>>
>> On Jul 1, 2012, at 20:45 , Rick Mann wrote:
>>
>>> Hi. I'm trying to use pgmspace with avr-gcc 4.3.3. The archive had this
>>> question posted (in reference to WinAVR), and some discussion about a
>>> thread in AVR Freaks, but AVR Freak's search isn't very good (I've never
>>> liked phpBBS).
>>>
>>> Can anyone tell me if I can safely ignore that warning, and if there's a
>>> newer version of GCC that doesn't emit it?
>>>
>>> I modified a line like
>>>
>>> printf("foo\n");
>>>
>>> to
>>> printf_P(PSTR("foo\n"));
>>>
>>> and get that warning.
>>>
>>> Thanks,
>>> Rick
>>>
>>>
>>> _______________________________________________
>>> AVR-chat mailing list
>>> address@hidden
>>> https://lists.nongnu.org/mailman/listinfo/avr-chat
>>
>>
>> _______________________________________________
>> AVR-chat mailing list
>> address@hidden
>> https://lists.nongnu.org/mailman/listinfo/avr-chat
>