pgmspace.h is not supported?

Hardware Arduino Due
6

Here is the "pgmspace.h" that Teensy 3.0 uses to (hopefully) make most AVR-specific code compile and work:

#ifndef __PGMSPACE_H_
#define __PGMSPACE_H_ 1

#include <inttypes.h>

#define PROGMEM
#define PGM_P  const char *
#define PSTR(str) (str)

typedef void prog_void;
typedef char prog_char;
typedef unsigned char prog_uchar;
typedef int8_t prog_int8_t;
typedef uint8_t prog_uint8_t;
typedef int16_t prog_int16_t;
typedef uint16_t prog_uint16_t;
typedef int32_t prog_int32_t;
typedef uint32_t prog_uint32_t;

#define strcpy_P(dest, src) strcpy((dest), (src))
#define strcat_P(dest, src) strcat((dest), (src))
#define strcmp_P(a, b) strcmp((a), (b))

#define pgm_read_byte(addr) (*(const unsigned char *)(addr))
#define pgm_read_word(addr) (*(const unsigned short *)(addr))
#define pgm_read_dword(addr) (*(const unsigned long *)(addr))
#define pgm_read_float(addr) (*(const float *)(addr))

#define pgm_read_byte_near(addr) pgm_read_byte(addr)
#define pgm_read_word_near(addr) pgm_read_word(addr)
#define pgm_read_dword_near(addr) pgm_read_dword(addr)
#define pgm_read_float_near(addr) pgm_read_float(addr)
#define pgm_read_byte_far(addr) pgm_read_byte(addr)
#define pgm_read_word_far(addr) pgm_read_word(addr)
#define pgm_read_dword_far(addr) pgm_read_dword(addr)
#define pgm_read_float_far(addr) pgm_read_float(addr)

#endif

I'm still refining this and lots of other AVR compatibility stuff. But so far, it seems to be working for the most common usages.