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?
