Hello, I have recently had much success by the PROGMEM definition suggested by curtvm on the avrfreaks forum. At the end of pgmspace.h I inserted:
//undefine #undef PROGMEM //redefine #define PROGMEM MAKE_PGM_SECTION_(__LINE__) //expand __LINE__ #define MAKE_PGM_SECTION_(line) MAKE_PGM_SECTION__(line) //join .progmem.line #define MAKE_PGM_SECTION__(line) MAKE_PGM_SECTION___(.progmem.##line) //stringify to section attribute #define MAKE_PGM_SECTION___(name) __attribute__((section(#name))) The forum topic: http://www.avrfreaks.net/index.php?name=PNphpBB2&file=viewtopic&t=78644 What this does is put each PROGMEM definition in a separate section so that the linker option --gc-sections can remove unused data sections in flash (before it would only work for code, and ram data but not flash data) I would use #ifdefs to check if the gcc supports __COUNTER__ instead of line (so multiple progmem definitions can be on the same line without section conflict) I propose adding this to avr-libc.. it seems like only a benefit since it can reduce code size (in my case by 4kb) any objections? Sean _______________________________________________ AVR-GCC-list mailing list AVR-GCC-list@nongnu.org http://lists.nongnu.org/mailman/listinfo/avr-gcc-list
