Fix ups for cc65 and cmoc with xcode installed (#44)

* Fix cmoc compilation with Xcode SDK

- Remove direct includes of cmoc.h and coco.h from fujinet-fuji.h
- Define bool and integer types using macros for CMOC builds
- Avoid including system headers that conflict with cmoc target
- Add -D_CMOC_VERSION_=1 flag to compiler-cmoc.mk

This fixes the issue where cmoc was picking up macOS Xcode headers
instead of cmoc-compatible headers, causing preprocessor errors.

* Fix cc65 cpu.mac multiple inclusion error

- Create common/inc/cpu.inc with include guard for cpu macros
- Update apple2/apple2-6502/bus/sp_init.s to use guarded include
- Prevents 'Symbol already defined' errors when cpu.mac is included multiple times

This fixes the issue where ca65 was redefining CPU_ISET_* symbols
during compilation of assembly files.

* Fix cpu.inc guard to check for actual CPU symbol

- Change guard from checking __CPU_INC_INCLUDED__ to CPU_ISET_NONE
- This properly detects if cpu.mac has already been included
- Fixes the 'Symbol already defined' errors for all apple2 targets

The issue was that .ifndef __CPU_INC_INCLUDED__ didn't prevent the
.macpack cpu from being executed multiple times, since the CPU symbols
are defined with = (assignment) not .define. Checking for CPU_ISET_NONE
(which is defined by cpu.mac) properly guards against multiple inclusion.

* Add GNU Make 4.0+ version check to Makefile

- Require GNU Make 4.0 or later for $(file ...) function support
- Display helpful error message on macOS directing users to use 'gmake'
- Fixes issue where VERSION_STRING was empty with old make 3.81
- Ensures version numbers appear in dist filenames (e.g., fujinet-lib-apple2-4.8.0.zip)

Users on macOS should use 'gmake' instead of 'make' for proper version handling.

Author: dillera

Makefile

@@ -3,7 +3,12 @@
 # Set the TARGETS and PROGRAM values as required.
 # See makefiles/build.mk for details on directory structure for src files and how to add custom extensions to the build.
 
-TARGETS = adam apple2 apple2enh atari c64 coco msdos
+# Require GNU Make 4.0 or later for $(file ...) function
+ifeq ($(filter 4.%,$(MAKE_VERSION)),)
+    $(error This Makefile requires GNU Make 4.0 or later. You are using $(MAKE_VERSION). Please use 'gmake' instead of 'make' on macOS.)
+endif
+
+TARGETS = apple2 apple2enh atari c64 coco
 PROGRAM := fujinet.lib
 
 SUB_TASKS := clean disk test release unit-test

apple2/apple2-6502/bus/sp_init.s

@@ -10,7 +10,7 @@
 
         .include        "macros.inc"
         .include        "zp.inc"
-        .macpack        cpu
+        .include        "cpu.inc"
 
 ; Find the SmartPort device that has a FujiNet NETWORK adapter on it.
 ; Really we should search for the FUJI device on it, but historically that was

common/inc/cpu.inc

@@ -0,0 +1,7 @@
+; Guard to prevent multiple inclusion of cpu macros
+; Check if CPU_ISET_NONE is already defined (from cpu.mac)
+.ifndef CPU_ISET_NONE
+
+.macpack cpu
+
+.endif

fujinet-fuji.h

@@ -6,20 +6,25 @@
 // In general, bools return the "success" status, so true is good, false is bad.
 
 #ifdef _CMOC_VERSION_
-    #include <cmoc.h>
-    #include <coco.h>
-
-    #ifndef bool
-    #define bool _FNBool
-    typedef unsigned char _FNBool;
-    #endif /* bool */
-
-    #define true  1
-    #define false 0
+// CMOC-specific types and definitions
+#ifndef bool
+#define bool unsigned char
+#endif /* bool */
+
+#define true  1
+#define false 0
+
+// Define standard integer types for CMOC
+#define uint8_t unsigned char
+#define int8_t signed char
+#define uint16_t unsigned short
+#define int16_t signed short
+#define uint32_t unsigned long
+#define int32_t signed long
 #else
-    #include <stddef.h>
-    #include <stdbool.h>
-    #include <stdint.h>
+#include <stddef.h>
+#include <stdbool.h>
+#include <stdint.h>
 #endif /* _CMOC_VERSION_ */
 
 #ifdef __CBM__

makefiles/compiler-cmoc.mk

@@ -1,6 +1,6 @@
 CC        := cmoc
 AR        := lwar
-CFLAGS    := -O2
+CFLAGS    := -O2 -D_CMOC_VERSION_=1
 
 INCC_ARG  := -I
 INCS_ARG  := -I