[sdcc-devel] Z80 casts / enums / function definitions

[Michael H. <mic...@ju...>]

For 'fun' I decided to try to compile uzix (http://uzix.sourceforge.net/),
which is a version of V7 Unix for the Z80 based MSX.  I hit some
warnings/errors that I'm not sure if they are bugs or what we should do
about them.

1.  Literal to pointer cast.

This code:
    char *p = (char *)0xa000;

is valid on a z80 as there are no storage classes.  It currently throws
the 'illegal cast of LITERAL value to 'generic' pointer' warning.  What is
a good way to handle this?

2.  Enum entry refering to a prevoius entry.
See support/regression/tests/enum.c.  This code:

enum {
  FIRST,
  FIRST_ALIAS = FIRST
};

throws an error 'Undefined identifier FIRST'

3.  Duplicated names in a function pointer def.
See support/regression/tests/driverstruct.c

This code:

struct s_ptrs {
	int (*init)(int minor);
	int (*something)(int minor);
};

throws the error 'Duplicate symbol 'minor', symbol ignored'.  I think the
code above is acceptable.  I think that also

void func(int a, int (*fun)(int a)) { .. }

will throw the same error.

If these are really bugs then I will add them in.

-- Michael