typedef of bool in <rpcsvc/yp_prot.h> conflicts with the one in <sys/stdbool.h>

[grubba]

From <stdbool.h>:

#ifndef __cplusplus
#if defined(_STDC_C99) || defined(__C99FEATURES__) || __GNUC__ >= 3

#undef	bool
#undef	true
#undef	false

#define	bool	_Bool
#define	true	1
#define	false	0

#define	__bool_true_false_are_defined	1

#endif /* defined(_STDC_C99) || defined(__C99FEATURES__) || __GNUC__ >= 3 */
#endif /* __cplusplus */

<rpcsvc/yp_prot.h> in turn contains:

/* 'bool' is a built-in type for g++ */
#if !(defined(__cplusplus) && defined(_BOOL)) && !defined(__GNUG__)
#ifndef BOOL_DEFINED
typedef unsigned int bool;
#define	BOOL_DEFINED
#endif
#endif

The latter is a syntax error if the first #define is active as it expands to:

typedef unsigned int _Bool;

Where _Bool is a keyword in C11 and later.

BTW: Note also that bool in itself is a keyword in C23 and later.

My suggestion is to update <sys/stdbool.h> to:

• Define BOOL_DEFINED (or alter the test in <rpcsvc/yp_prot.h> to check __bool_true_false_defined).
• Update it to know about C23 (not strictly necessary as _Bool is still an alias).