With r335636 C++ program use libcasper.h and capsicum_helpers.h.

Add __BEGIN_DECLS and __END_DECLS to those headers.

lib/libcapsicum/capsicum_helpers.h

@@ -46,6 +46,8 @@
 #define	CAPH_WRITE		0x0004
 #define	CAPH_LOOKUP		0x0008
 
+__BEGIN_DECLS
+
 static __inline int
 caph_limit_stream(int fd, int flags)
 {
@@ -142,4 +144,6 @@ caph_enter_casper(void)
 	return (CASPER_SUPPORT == 0 ? 0 : caph_enter());
 }
 
+__END_DECLS
+
 #endif /* _CAPSICUM_HELPERS_H_ */

lib/libcasper/libcasper/libcasper.h

@@ -71,6 +71,8 @@ typedef struct cap_channel cap_channel_t;
 #endif /* ! WITH_CASPER */
 #endif /* ! _CAP_CHANNEL_T_DECLARED */
 
+__BEGIN_DECLS
+
 #ifdef WITH_CASPER
 int cap_channel_flags(const cap_channel_t *chan);
 #else
@@ -279,4 +281,6 @@ cap_xfer_nvlist(const cap_channel_t *chan, nvlist_t *nvl)
 }
 #endif
 
+__END_DECLS
+
 #endif	/* !_LIBCASPER_H_ */