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--- avr-libc-1.7.1.orig/include/avr/pgmspace.h
+++ avr-libc-1.7.1/include/avr/pgmspace.h
@@ -252,7 +252,7 @@
# define PSTR(s) ((const PROGMEM char *)(s))
#else /* !DOXYGEN */
/* The real thing. */
-# define PSTR(s) (__extension__({static char __c[] PROGMEM = (s); &__c[0];}))
+# define PSTR(s) (__extension__({static const char __c[] PROGMEM = (s); &__c[0];}))
#endif /* DOXYGEN */
#define __LPM_classic__(addr) \
--- avr-libc-1.7.1.orig/libc/stdlib/dtostre.c
+++ avr-libc-1.7.1/libc/stdlib/dtostre.c
@@ -37,9 +37,9 @@
char *
dtostre (double val, char *sbeg, unsigned char prec, unsigned char flags)
{
- __attribute__((progmem)) static char str_nan[2][4] =
+ __attribute__((progmem)) static const char str_nan[2][4] =
{"nan", "NAN"};
- __attribute__((progmem)) static char str_inf[2][sizeof(str_nan[0])] =
+ __attribute__((progmem)) static const char str_inf[2][sizeof(str_nan[0])] =
{"inf", "INF"};
char *d; /* dst */
char *s; /* src */
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