[Bug target/49764] [gcc-avr] Compiling for Arduino is not working

["artemeas at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49764

--- Comment #7 from _artem_ <artemeas at gmail dot com> 2011-07-16 19:05:46 UTC ---
I don't understand what you want from me.
I read that "How to report, what we need and what we don't" SO?
What info you want from me in addition to the text I posted in the bug report?

I don't know 
"the complete command line that triggers the bug;"

because I don't know how to compile that code outside of IDE.
I upgraded gcc (GCC not gcc-avr) from 4.6.0 to 4.6.1 couple of days ago,
gcc-avr was still 4.6.0. I was able to compile for arduino (ATmega328P-PU). I
installed 4.6.1 of gcc-avr and I'm unable to compile for ATmega328 from IDE. I
downgraded ONLY gcc-avr to 4.6.0 result: IDE compiles code. upgraded to 4.6.1
again and I can't compile again.

You would ONLY need 3 minutes to download and to run that IDE on both versions
of gcc-avr. and You would know what's the reason is. I don't what is causing
this errors, the only thing that was changed on my machine is the GCC-AVR
version, from 4.6.0->4.6.1

lines 66-.. that are in the error:
66 extern const uint16_t PROGMEM port_to_mode_PGM[];
 67 extern const uint16_t PROGMEM port_to_input_PGM[];
 68 extern const uint16_t PROGMEM port_to_output_PGM[];
 69 
 70 extern const uint8_t PROGMEM digital_pin_to_port_PGM[];
 71 // extern const uint8_t PROGMEM digital_pin_to_bit_PGM[];
 72 extern const uint8_t PROGMEM digital_pin_to_bit_mask_PGM[];
 73 extern const uint8_t PROGMEM digital_pin_to_timer_PGM[];

on gcc-avr 4.6.0 I get no errors on that code, on gcc-avr 4.6.1 I get error
listed in the first message.

"variable 'port_to_mode_PGM' must be const in order to be put into read-only"
produced from this:
extern const uint16_t PROGMEM port_to_mode_PGM[];

was there something changed in gcc-avr that would give such an error?