In the meantime, getting an updated libc from elsewhere than the apt repos is
an option?
C
> On Nov 11, 2015, at 11:40 AM, Matthias Urlichs <matth...@urlichs.de> wrote:
>
>> On 11.11.2015 13:42, Johan Ström wrote:
>> Also try to search for pgm_read_ptr_near and/or pgm_read* in the include
>> files which your avr-libc package installs (check with your package
>> manager how to list installed files).
>
> There seem to be some somewhat-incompatible and probably incompletely
> updated/patched AVR libc packages floating around, and Ubuntu LTR14
> appears to have caught one of them.
>
> It's all in /usr/lib/avr/include/avr/pgmspace.h.
>
> The complete code from that file, as far as pgm_read_ptr_near is
> concerned, is this:
>
> #define __LPM_word_classic__(addr) \
> (__extension__({ \
> uint16_t __addr16 = (uint16_t)(addr); \
> uint16_t __result; \
> __asm__ __volatile__ \
> ( \
> "lpm" "\n\t" \
> "mov %A0, r0" "\n\t" \
> "adiw r30, 1" "\n\t" \
> "lpm" "\n\t" \
> "mov %B0, r0" "\n\t" \
> : "=r" (__result), "=z" (__addr16) \
> : "1" (__addr16) \
> : "r0" \
> ); \
> __result; \
> }))
>
> #define __LPM_word_tiny__(addr) \
> (__extension__({ \
> uint16_t __addr16 = (uint16_t)(addr) + __AVR_TINY_PM_BASE_ADDRESS__; \
> uint16_t __result; \
> __asm__ \
> ( \
> "ld %A0, z+" "\n\t" \
> "ld %B0, z" "\n\t" \
> : "=r" (__result), "=z" (__addr16) \
> : "1" (__addr16) \
> ); \
> __result; \
> }))
>
> #define __LPM_word_enhanced__(addr) \
> (__extension__({ \
> uint16_t __addr16 = (uint16_t)(addr); \
> uint16_t __result; \
> __asm__ __volatile__ \
> ( \
> "lpm %A0, Z+" "\n\t" \
> "lpm %B0, Z" "\n\t" \
> : "=r" (__result), "=z" (__addr16) \
> : "1" (__addr16) \
> ); \
> __result; \
> }))
>
> #if defined (__AVR_HAVE_LPMX__)
> #define __LPM_word(addr) __LPM_word_enhanced__(addr)
> #elif defined (__AVR_TINY__)
> #define __LPM_word(addr) __LPM_word_tiny__(addr)
> #else
> #define __LPM_word(addr) __LPM_word_classic__(addr)
> #endif
>
> #define pgm_read_ptr_near(address_short) \
> (void*)__LPM_word((uint16_t)(address_short))
>
> Thus if somebody could build a patch for MoaT that can work around
> whatever is missing from your avr libc (preferably without duplicating
> anything that _is_ there), please go ahead and submit a pull request.
> Thank you.
>
> --
> -- Matthias Urlichs
>
>
>
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