Follow-up Comment #2, bug #28837 (project avr-libc):
The approach of redefining PROGMEM to
#define PROGMEM _attribute_(( section(".progmem.data") ))
works, but is sensitive to storage class specification.
#include <avr/pgmspace.h>
#undef PROGMEM
#define PROGMEM __attribute__(( section(".progmem.data") ))
PROGMEM const char string1[] = "String 1";
PROGMEM char string2[] = "String 2";
int main(void) {
return 1;
}
gives
error: string2 causes a section type conflict
Program memory is read-only flash memory so not using const is a bug.
Unfortunately it seems avr-libc is pretty buggy here...
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