Fix the namespace pollution caused by iconv.h including stdbool.h

This broke any C89 ports that defined bool themselves, including things
like gcc, gtk, and so on.

include/iconv.h

@@ -35,7 +35,6 @@
 #include <sys/cdefs.h>
 #include <sys/types.h>
 
-#include <stdbool.h>
 #include <wchar.h>
 
 #include <sys/cdefs.h>
@@ -48,6 +47,13 @@
 #define libiconv		iconv
 #define libiconv_t		iconv_t
 #endif
+#ifdef __cplusplus
+typedef	bool	__iconv_bool;
+#elif __STDC_VERSION__ >= 199901L
+typedef	_Bool	__iconv_bool;
+#else
+typedef	int	__iconv_bool;
+#endif
 
 struct __tag_iconv_t;
 typedef	struct __tag_iconv_t	*iconv_t;
@@ -61,7 +67,7 @@ int	iconv_close(iconv_t);
 /*
  * non-portable interfaces for iconv
  */
-int	__iconv_get_list(char ***, size_t *, bool);
+int	__iconv_get_list(char ***, size_t *, __iconv_bool);
 void	__iconv_free_list(char **, size_t);
 size_t	__iconv(iconv_t, const char **, size_t *, char **,
 		     size_t *, __uint32_t, size_t *);

lib/libc/iconv/citrus_iconv_local.h

@@ -31,6 +31,7 @@
 #define _CITRUS_ICONV_LOCAL_H_
 
 #include <iconv.h>
+#include <stdbool.h>
 
 #define _CITRUS_ICONV_GETOPS_FUNC_BASE(_n_)				\
     int _n_(struct _citrus_iconv_ops *)

lib/libiconv_modules/Makefile

@@ -2,6 +2,9 @@
 
 .include <bsd.own.mk>
 
+CFLAGS+=	-Dbool=_Bool
+.export CFLAGS
+
 SUBDIR=	BIG5 DECHanyu EUC EUCTW GBK2K HZ ISO2022 JOHAB MSKanji UES UTF1632 \
 	UTF7 UTF8 VIQR ZW iconv_none iconv_std mapper_646 mapper_none \
 	mapper_parallel mapper_serial mapper_std mapper_zone