Fix pgm_read_ptr_aligned() per #5735

Author: earlephilhower

tests/host/sys/pgmspace.h

@@ -31,13 +31,13 @@
     #define pgm_read_word(addr)             (*reinterpret_cast<const uint16_t*>(addr))
     #define pgm_read_dword(addr)            (*reinterpret_cast<const uint32_t*>(addr))
     #define pgm_read_float(addr)            (*reinterpret_cast<const float>(addr))
-    #define pgm_read_ptr(addr)              (*reinterpret_cast<const void const *>(addr))
+    #define pgm_read_ptr(addr)              (*reinterpret_cast<const void* const *>(addr))
 #else
     #define pgm_read_byte(addr)             (*(const uint8_t*)(addr))
     #define pgm_read_word(addr)             (*(const uint16_t*)(addr))
     #define pgm_read_dword(addr)            (*(const uint32_t*)(addr))
     #define pgm_read_float(addr)            (*(const float)(addr))
-    #define pgm_read_ptr(addr)              (*(const void const *)(addr))
+    #define pgm_read_ptr(addr)              (*(const void* const *)(addr))
 #endif
 
 #define pgm_read_byte_near(addr)        pgm_read_byte(addr)

tools/sdk/libc/xtensa-lx106-elf/include/sys/pgmspace.h

@@ -75,11 +75,11 @@ static inline uint16_t pgm_read_word_inlined(const void* addr) {
 #ifdef __cplusplus
     #define pgm_read_dword_aligned(addr)   (*reinterpret_cast<const uint32_t*>(addr))
     #define pgm_read_float_aligned(addr)   (*reinterpret_cast<const float*>(addr))
-    #define pgm_read_ptr_aligned(addr)     (*reinterpret_cast<const void*>(addr))
+    #define pgm_read_ptr_aligned(addr)     (*reinterpret_cast<const void* const*>(addr))
 #else
     #define pgm_read_dword_aligned(addr)   (*(const uint32_t*)(addr))
     #define pgm_read_float_aligned(addr)   (*(const float*)(addr))
-    #define pgm_read_ptr_aligned(addr)     (*(const void*)(addr))
+    #define pgm_read_ptr_aligned(addr)     (*(const void* const*)(addr))
 #endif
 
 __attribute__((optimize("-O3"), always_inline)) static inline uint32_t pgm_read_dword_unaligned(const void *addr) {