Re: [avr-gcc-list] Compiling problem

[Georg-Johann Lay]

John Tucker schrieb:

> I'm not even sure as to whether it's my compilation of
> avr-gcc that's causing the error or if it's something in
> the library. The error message I get while trying to compile
> avr-libc-1.7.1 is:
>
> -----------------------------------------------
> ./../../libc/stdlib/dtostre.c: In function 'dtostre':
> ../../../libc/stdlib/dtostre.c:63:2: internal compiler error:
> in build_unary_op, at c-typeck.c:3786
> Please submit a full bug report,

This is

http://savannah.nongnu.org/bugs/?32988
http://gcc.gnu.org/PR44643

The problem is that avr-libc puts some data in PROGMEM without 
qualifying them as const.  avr-gcc tryes to fix that, but that leads to 
inconsistency in other part of GCC and to the ICE ran into.

Easiest fix is to use current development version from avr-libc 
repository which has this bug fixed.  The fix consists in making 
respective variables const, see the reported source location in 
dtostre.c.  Moreover, you will need to change PSTR definition as lined 
out in PR32988.

Note that PR44643 is fixed in current gcc, however, also note that there 
will still be an error: just an "ordinary" error complaining about 
on-const data being put into const section instead of an ICE.

Johann