2.2.1 prog_void
Note:
This typedef is now deprecated because the usage of the __progmem__ attribute on a type is not supported in GCC. However, the use of the __progmem__ attribute on a variable declaration is supported, and this is now the recommended usage.DEPRECATED
The typedef is only visible if the macro __PROG_TYPES_COMPAT__ has been defined before including <avr/pgmspace.h> (either by a #define directive, or by a -D compiler option.)
Type of a "void" object located in flash ROM. Does not make much sense by itself, but can be used to declare a "void *" object in flash ROM.