_MINIX_SYSTEM - fixes for in-minix crossbuild

. define _MINIX_SYSTEM for all system code from minix.service.mk
	. hide some system-level declarations and definitions
	  behind _MINIX_SYSTEM to cleanly fix host tool build problems on
	  Minix (such as: NONE being defined and paddr_t being used but not
	  declared)
	. the similar definition _SYSTEM is unsuitable as it changes the
	  values of errno definitions

Change-Id: I407de79e2575115243a074b16e79546a279cfa3e

include/minix/ds.h

@@ -3,6 +3,8 @@
 #ifndef _MINIX_DS_H
 #define _MINIX_DS_H
 
+#ifdef _MINIX_SYSTEM
+
 #include <sys/types.h>
 #include <minix/endpoint.h>
 
@@ -66,5 +68,7 @@ int ds_delete_label(const char *ds_name);
 int ds_subscribe(const char *regex, int flags);
 int ds_check(char *ds_name, int *type, endpoint_t *owner_e);
 
+#endif /* _MINIX_SYSTEM */
+
 #endif /* _MINIX_DS_H */
 

include/minix/endpoint.h

@@ -2,6 +2,8 @@
 #ifndef _MINIX_ENDPOINT_H
 #define _MINIX_ENDPOINT_H 1
 
+#ifdef _MINIX_SYSTEM
+
 #include <minix/sys_config.h>
 #include <minix/com.h>
 #include <limits.h>
@@ -68,4 +70,6 @@
 #define _ENDPOINT_P(e) \
 	((((e)+MAX_NR_TASKS) & (_ENDPOINT_GENERATION_SIZE - 1)) - MAX_NR_TASKS)
 
+#endif /* _MINIX_SYSTEM */
+
 #endif

include/minix/param.h

@@ -8,6 +8,7 @@
 /* Number of processes contained in the system image. */
 #define NR_BOOT_PROCS   (NR_TASKS + LAST_SPECIAL_PROC_NR + 1)
 
+#ifdef _MINIX_SYSTEM
 /* This is used to obtain system information through SYS_GETINFO. */
 #define MAXMEMMAP 40
 typedef struct kinfo {
@@ -44,5 +45,6 @@ typedef struct kinfo {
 	int kernel_allocated_bytes;		/* used by kernel */
 	int kernel_allocated_bytes_dynamic;	/* used by kernel (runtime) */
 } kinfo_t;
+#endif /* _MINIX_SYSTEM */
 
 #endif