Re: String array in ROM gives error in spite of following example code.

Hello,

Newer version of gcc have changed the progmem behaviour, it cannot be
applied to typedef anymore if I remember well.

const char * pgtmp_msg[] should solve your issue

Regards

Francois


On Thu, Jun 12, 2014 at 12:23 PM, Royce Pereira <[email protected]> wrote:

> Hi,
>
> I recently updated WinAVR to a newer version of the AVR-GCC toolchain,
> downloaded from the Atmel site.
>
> My version is this:
>
> avr-gcc (AVR_8_bit_GNU_Toolchain_3.4.3_1072) 4.8.1
>
> My code was compiling without errors before, but with this version, it
> is giving errors in spite of following the instructions in the faq
> section of the avr-libc document.
> //---------------------------------------------
> #include <avr/io.h>
> #include <avr/pgmspace.h>
>
> const char ptmpUP_msg[]      PROGMEM = "Upper Temp" ;
> const char ptmpDN_msg[]      PROGMEM = "Lower Temp" ;
> const char ptmpCLG_msg[]     PROGMEM = "Chiller Temp" ;
>
> PGM_P  pgtmp_msg[]    PROGMEM =
>    { ptmpUP_msg, ptmpDN_msg,  ptmpCLG_msg,} ;
>
> //------------------------------------------------------
> The above code gives the following error:
>
> error: variable 'pgtmp_msg' must be const in order to be put into
> read-only section by means of  '__attribute__((progmem))'
> //-----------------------------------------------------
>
> But I have followed the avr-libc example exactly.
> So why is this error thrown and whats the correct way to do this ?
>
> Thank You.
> --
> Best Regards,
>
> -- Royce Pereira
>
> _______________________________________________
> AVR-GCC-list mailing list
> [email protected]
> https://lists.nongnu.org/mailman/listinfo/avr-gcc-list
>

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