Big check-in of compatibility layer. This should work on most major architectures. Thanks to Joerg Sonnenberger.

36 files changed, 207 insertions, 67 deletions

diff --git a/Makefile b/Makefile
index 1ee8b325..09602188 100644
--- a/Makefile
+++ b/Makefile
@@ -13,9 +13,9 @@ INSTALL_MAN	= $(INSTALL_DATA)
 VERSION	   = 1.9.14
 VDATE	   = 16 November 2009
 
-VFLAGS     = -DVERSION="\"$(VERSION)\""
-CFLAGS    += -W -Wall -Wstrict-prototypes -Wno-unused-parameter -Wwrite-strings -g
-CFLAGS    += $(VFLAGS)
+VFLAGS     = -DVERSION="\"$(VERSION)\"" -DHAVE_CONFIG_H
+WFLAGS     = -W -Wall -Wstrict-prototypes -Wno-unused-parameter -Wwrite-strings
+CFLAGS    += -g $(VFLAGS) $(WFLAGS)
 #CFLAGS	  += -DOSNAME="\"OpenBSD 4.5\""
 LINTFLAGS += $(VFLAGS)
 
@@ -74,11 +74,13 @@ TARGZS	   = mdocml-$(VERSION).tar.gz
 MANS	   = mandoc.1 mdoc.3 mdoc.7 manuals.7 mandoc_char.7 \
 	     man.7 man.3
 BINS	   = mandoc
+TESTS	   = test-strlcat.c test-strlcpy.c
+CONFIGS	   = config.h.pre config.h.post
 CLEAN	   = $(BINS) $(LNS) $(LLNS) $(LIBS) $(OBJS) $(HTMLS) \
 	     $(TARGZS) tags $(MD5S) $(XMLS) $(TEXTS) $(GSGMLS) \
-	     $(GHTMLS)
+	     $(GHTMLS) config.h config.log
 INSTALL	   = $(SRCS) $(HEADS) Makefile $(MANS) $(SGMLS) $(STATICS) \
-	     $(DATAS) $(XSLS) $(EXAMPLES)
+	     $(DATAS) $(XSLS) $(EXAMPLES) $(TESTS) $(CONFIGS)
 
 all:	$(BINS)
 
@@ -123,6 +125,8 @@ uninstall:
 	rm -f $(MANDIR)/man7/man.7
 	rm -f $(EXAMPLEDIR)/example.style.css
 
+$(OBJS): config.h
+
 man_macro.ln: man_macro.c libman.h
 man_macro.o: man_macro.c libman.h
 
@@ -254,3 +258,19 @@ mandoc: $(MAINOBJS) libmdoc.a libman.a
 
 .tar.gz.md5:
 	md5 $< > $@
+
+config.h: config.h.pre config.h.post
+	rm -f config.log
+	( cat config.h.pre; \
+	echo; \
+	if $(CC) $(CFLAGS) -c test-strlcat.c >> config.log 2>&1; then \
+		echo '#define HAVE_STRLCAT'; \
+		rm test-strlcat.o; \
+	fi; \
+	if $(CC) $(CFLAGS) -c test-strlcpy.c >> config.log 2>&1; then \
+		echo '#define HAVE_STRLCPY'; \
+		rm test-strlcpy.o; \
+	fi; \
+	echo; \
+	cat config.h.post \
+	) > $@
diff --git a/arch.c b/arch.c
index 61eafd84..2455c474 100644
--- a/arch.c
+++ b/arch.c
@@ -14,6 +14,10 @@
  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
 #include <stdlib.h>
 #include <string.h>
 #include <time.h>
diff --git a/att.c b/att.c
index 46618ba2..40254d99 100644
--- a/att.c
+++ b/att.c
@@ -14,6 +14,10 @@
  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
 #include <stdlib.h>
 #include <string.h>
 #include <time.h>
diff --git a/chars.c b/chars.c
index c297e610..e1822e2e 100644
--- a/chars.c
+++ b/chars.c
@@ -14,6 +14,10 @@
  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
 #include <assert.h>
 #include <stdio.h>
 #include <stdlib.h>
diff --git a/compat.c b/compat.c
index 8665ffa8..f00cc5c6 100644
--- a/compat.c
+++ b/compat.c
@@ -15,12 +15,16 @@
  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
 
 #include <sys/types.h>
 #include <string.h>
 
-#ifdef __linux__
+int dummy; /* To prevent an empty object file */
 
+#ifndef HAVE_STRLCAT
 /*
  * Appends src to string dst of size siz (unlike strncat, siz is the
  * full size of dst, not space left).  At most siz-1 characters
@@ -55,7 +59,9 @@ strlcat(char *dst, const char *src, size_t siz)
 
 	return(dlen + (s - src));	/* count does not include NUL */
 }
+#endif
 
+#ifndef HAVE_STRLCPY
 /*
  * Copy src to string dst of size siz.  At most siz-1 characters
  * will be copied.  Always NUL terminates (unless siz == 0).
@@ -86,5 +92,4 @@ strlcpy(char *dst, const char *src, size_t siz)
 
 	return(s - src - 1);	/* count does not include NUL */
 }
-
 #endif 
diff --git a/config.h.post b/config.h.post
new file mode 100644
index 00000000..81c01b93
--- /dev/null
+++ b/config.h.post
@@ -0,0 +1,25 @@
+#include <sys/types.h>
+
+#if !defined(__BEGIN_DECLS)
+#  ifdef __cplusplus
+#  define	__BEGIN_DECLS		extern "C" {
+#  else
+#  define	__BEGIN_DECLS
+#  endif
+#endif
+#if !defined(__END_DECLS)
+#  ifdef __cplusplus
+#  define	__END_DECLS		}
+#  else
+#  define	__END_DECLS
+#  endif
+#endif
+
+#ifndef HAVE_STRLCAT
+extern	size_t	  strlcat(char *, const char *, size_t);
+#endif
+#ifndef HAVE_STRLCPY
+extern	size_t	  strlcpy(char *, const char *, size_t);
+#endif
+
+#endif /* MANDOC_CONFIG_H */
diff --git a/config.h.pre b/config.h.pre
new file mode 100644
index 00000000..a309ed95
--- /dev/null
+++ b/config.h.pre
@@ -0,0 +1,6 @@
+#ifndef	MANDOC_CONFIG_H
+#define	MANDOC_CONFIG_H
+
+#if defined(__linux__) || defined(__MINT__)
+# define _GNU_SOURCE /* strptime(), getsubopt() */
+#endif
diff --git a/html.c b/html.c
index be87919e..c1ae9eea 100644
--- a/html.c
+++ b/html.c
@@ -14,6 +14,10 @@
  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
 #include <sys/types.h>
 
 #include <assert.h>
@@ -89,11 +93,6 @@ static	const char	*const htmlattrs[ATTR_MAX] = {
 	"summary",
 };
 
-#ifdef __linux__
-extern	int		  getsubopt(char **, char * const *, char **);
-#endif
-
-
 static	void		  print_spec(struct html *, const char *, size_t);
 static	void		  print_res(struct html *, const char *, size_t);
 static	void		  print_ctag(struct html *, enum htmltag);
diff --git a/lib.c b/lib.c
index fa0b4ad2..e9f4a80d 100644
--- a/lib.c
+++ b/lib.c
@@ -14,6 +14,10 @@
  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
 #include <stdlib.h>
 #include <string.h>
 #include <time.h>
diff --git a/main.c b/main.c
index ddc74756..20fe0cce 100644
--- a/main.c
+++ b/main.c
@@ -14,6 +14,10 @@
  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
 #include <sys/stat.h>
 
 #include <assert.h>
@@ -38,11 +42,6 @@
 # endif
 #endif /* !defined(__GNUC__) || (__GNUC__ < 2) */
 
-#ifdef __linux__
-extern	int		  getsubopt(char **, char * const *, char **);
-extern	size_t	  	  strlcat(char *, const char *, size_t);
-#endif
-
 typedef	void		(*out_mdoc)(void *, const struct mdoc *);
 typedef	void		(*out_man)(void *, const struct man *);
 typedef	void		(*out_free)(void *);
diff --git a/man.c b/man.c
index 345e0789..1bcf7d5b 100644
--- a/man.c
+++ b/man.c
@@ -14,6 +14,10 @@
  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
 #include <sys/types.h>
 
 #include <assert.h>
@@ -72,10 +76,6 @@ static	int		 pstring(struct man *, int, int,
 				const char *, size_t);
 static	int		 macrowarn(struct man *, int, const char *);
 
-#ifdef __linux__
-extern	size_t	  	  strlcpy(char *, const char *, size_t);
-#endif
-
 
 const struct man_node *
 man_node(const struct man *m)
diff --git a/man_action.c b/man_action.c
index aa56dda6..2d3000f5 100644
--- a/man_action.c
+++ b/man_action.c
@@ -14,6 +14,10 @@
  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
 #include <sys/utsname.h>
 
 #include <assert.h>
diff --git a/man_argv.c b/man_argv.c
index 65d088f7..92c46d0e 100644
--- a/man_argv.c
+++ b/man_argv.c
@@ -14,6 +14,10 @@
  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
 #include <sys/types.h>
 
 #include <assert.h>
diff --git a/man_hash.c b/man_hash.c
index 572be63d..7ca0da44 100644
--- a/man_hash.c
+++ b/man_hash.c
@@ -14,6 +14,10 @@
  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
 #include <sys/types.h>
 
 #include <assert.h>
diff --git a/man_html.c b/man_html.c
index d510ac09..32406eff 100644
--- a/man_html.c
+++ b/man_html.c
@@ -14,6 +14,10 @@
  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
 #include <sys/types.h>
 
 #include <assert.h>
@@ -66,11 +70,6 @@ static	int		  man_SH_pre(MAN_ARGS);
 static	int		  man_SM_pre(MAN_ARGS);
 static	int		  man_SS_pre(MAN_ARGS);
 
-#ifdef __linux__
-extern	size_t	  	  strlcpy(char *, const char *, size_t);
-extern	size_t	  	  strlcat(char *, const char *, size_t);
-#endif
-
 static	const struct htmlman mans[MAN_MAX] = {
 	{ man_br_pre, NULL }, /* br */
 	{ NULL, NULL }, /* TH */
diff --git a/man_macro.c b/man_macro.c
index 9c290e45..6f2e8348 100644
--- a/man_macro.c
+++ b/man_macro.c
@@ -14,6 +14,10 @@
  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
 #include <assert.h>
 #include <ctype.h>
 #include <stdlib.h>
diff --git a/man_term.c b/man_term.c
index 03f5cfdf..139ec436 100644
--- a/man_term.c
+++ b/man_term.c
@@ -14,6 +14,10 @@
  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
 #include <sys/types.h>
 
 #include <assert.h>
@@ -63,11 +67,6 @@ struct	termact {
 	void		(*post)(DECL_ARGS);
 };
 
-#ifdef __linux__
-extern	size_t		  strlcpy(char *, const char *, size_t);
-extern	size_t		  strlcat(char *, const char *, size_t);
-#endif
-
 static	int		  a2width(const struct man_node *);
 static	int		  a2height(const struct man_node *);
 
diff --git a/man_validate.c b/man_validate.c
index 3c5944fa..85cc763f 100644
--- a/man_validate.c
+++ b/man_validate.c
@@ -14,6 +14,10 @@
  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
 #include <sys/types.h>
 
 #include <assert.h>
diff --git a/mandoc.c b/mandoc.c
index 58c2d273..cf545382 100644
--- a/mandoc.c
+++ b/mandoc.c
@@ -14,8 +14,8 @@
  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
-#if defined(__linux__) || defined(__MINT__)
-# define _GNU_SOURCE /* strptime() */
+#ifdef HAVE_CONFIG_H
+#include "config.h"
 #endif
 
 #include <sys/types.h>
diff --git a/mdoc.c b/mdoc.c
index fd5b291c..f8024332 100644
--- a/mdoc.c
+++ b/mdoc.c
@@ -14,6 +14,10 @@
  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
 #include <sys/types.h>
 
 #include <assert.h>
@@ -93,11 +97,11 @@ const	char *const __mdoc_macronames[MDOC_MAX] = {
 	"Nm",		"Op",		"Ot",		"Pa",
 	"Rv",		"St",		"Va",		"Vt",
 	/* LINTED */
-	"Xr",		"\%A",		"\%B",		"\%D",
+	"Xr",		"%A",		"%B",		"%D",
 	/* LINTED */
-	"\%I",		"\%J",		"\%N",		"\%O",
+	"%I",		"%J",		"%N",		"%O",
 	/* LINTED */
-	"\%P",		"\%R",		"\%T",		"\%V",
+	"%P",		"%R",		"%T",		"%V",
 	"Ac",		"Ao",		"Aq",		"At",
 	"Bc",		"Bf",		"Bo",		"Bq",
 	"Bsx",		"Bx",		"Db",		"Dc",
@@ -114,11 +118,11 @@ const	char *const __mdoc_macronames[MDOC_MAX] = {
 	"Fr",		"Ud",		"Lb",		"Lp",
 	"Lk",		"Mt",		"Brq",		"Bro",
 	/* LINTED */
-	"Brc",		"\%C",		"Es",		"En",
+	"Brc",		"%C",		"Es",		"En",
 	/* LINTED */
-	"Dx",		"\%Q",		"br",		"sp",
+	"Dx",		"%Q",		"br",		"sp",
 	/* LINTED */
-	"\%U"
+	"%U"
 	};
 
 const	char *const __mdoc_argnames[MDOC_ARG_MAX] = {		 
@@ -148,11 +152,6 @@ static	int		  macrowarn(struct mdoc *, int, const char *);
 static	int		  pstring(struct mdoc *, int, int, 
 				const char *, size_t);
 
-#ifdef __linux__
-extern	size_t	  	  strlcpy(char *, const char *, size_t);
-#endif
-
-
 const struct mdoc_node *
 mdoc_node(const struct mdoc *m)
 {
diff --git a/mdoc_action.c b/mdoc_action.c
index 3cd0332c..dfe2aafc 100644
--- a/mdoc_action.c
+++ b/mdoc_action.c
@@ -14,6 +14,10 @@
  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
 #ifndef	OSNAME
 #include <sys/utsname.h>
 #endif
@@ -42,10 +46,6 @@ static	int	  concat(struct mdoc *, char *,
 			const struct mdoc_node *, size_t);
 static	inline int order_rs(int);
 
-#ifdef __linux__
-extern	size_t	  strlcat(char *, const char *, size_t);
-#endif
-
 static	int	  post_ar(POST_ARGS);
 static	int	  post_at(POST_ARGS);
 static	int	  post_bl(POST_ARGS);
diff --git a/mdoc_argv.c b/mdoc_argv.c
index 726a3f3f..4a96436c 100644
--- a/mdoc_argv.c
+++ b/mdoc_argv.c
@@ -14,6 +14,10 @@
  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
 #include <sys/types.h>
 
 #include <assert.h>
diff --git a/mdoc_hash.c b/mdoc_hash.c
index be2d457a..871000fc 100644
--- a/mdoc_hash.c
+++ b/mdoc_hash.c
@@ -14,6 +14,10 @@
  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
 #include <sys/types.h>
 
 #include <assert.h>
diff --git a/mdoc_html.c b/mdoc_html.c
index e43d9809..c9766217 100644
--- a/mdoc_html.c
+++ b/mdoc_html.c
@@ -14,8 +14,11 @@
  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
 #include <sys/types.h>
-#include <sys/param.h>
 
 #include <assert.h>
 #include <ctype.h>
@@ -36,6 +39,10 @@
 			  const struct mdoc_node *n, \
 			  struct html *h
 
+#ifndef MIN
+#define	MIN(a,b)	((/*CONSTCOND*/(a)<(b))?(a):(b))
+#endif
+
 struct	htmlmdoc {
 	int		(*pre)(MDOC_ARGS);
 	void		(*post)(MDOC_ARGS);
@@ -126,11 +133,6 @@ static	int		  mdoc_vt_pre(MDOC_ARGS);
 static	int		  mdoc_xr_pre(MDOC_ARGS);
 static	int		  mdoc_xx_pre(MDOC_ARGS);
 
-#ifdef __linux__
-extern	size_t	  	  strlcpy(char *, const char *, size_t);
-extern	size_t	  	  strlcat(char *, const char *, size_t);
-#endif
-
 static	const struct htmlmdoc mdocs[MDOC_MAX] = {
 	{mdoc_ap_pre, NULL}, /* Ap */
 	{NULL, NULL}, /* Dd */
diff --git a/mdoc_macro.c b/mdoc_macro.c
index ca4e554f..106a05db 100644
--- a/mdoc_macro.c
+++ b/mdoc_macro.c
@@ -14,6 +14,10 @@
  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
 #include <assert.h>
 #include <ctype.h>
 #include <stdlib.h>
diff --git a/mdoc_strings.c b/mdoc_strings.c
index 44413cbc..be96ca87 100644
--- a/mdoc_strings.c
+++ b/mdoc_strings.c
@@ -14,6 +14,10 @@
  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
 #include <sys/types.h>
 
 #include <assert.h>
diff --git a/mdoc_term.c b/mdoc_term.c
index 6c6c4775..405fde3f 100644
--- a/mdoc_term.c
+++ b/mdoc_term.c
@@ -14,6 +14,10 @@
  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
 #include <sys/types.h>
 
 #include <assert.h>
@@ -64,11 +68,6 @@ static	void	  print_mdoc_head(DECL_ARGS);
 static	void	  print_mdoc_nodelist(DECL_ARGS);
 static	void	  print_foot(DECL_ARGS);
 
-#ifdef __linux__
-extern	size_t	  strlcpy(char *, const char *, size_t);
-extern	size_t	  strlcat(char *, const char *, size_t);
-#endif
-
 static	void	  termp____post(DECL_ARGS);
 static	void	  termp_an_post(DECL_ARGS);
 static	void	  termp_aq_post(DECL_ARGS);
diff --git a/mdoc_validate.c b/mdoc_validate.c
index 5a4a92b3..22376c13 100644
--- a/mdoc_validate.c
+++ b/mdoc_validate.c
@@ -14,6 +14,10 @@
  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
 #include <sys/types.h>
 
 #include <assert.h>
@@ -62,10 +66,6 @@ static	int	 warn_count(struct mdoc *, const char *,
 static	int	 err_count(struct mdoc *, const char *, 
 			int, const char *, int);
 
-#ifdef __linux__
-extern	size_t	 strlcat(char *, const char *, size_t);
-#endif
-
 static	int	 berr_ge1(POST_ARGS);
 static	int	 bwarn_ge1(POST_ARGS);
 static	int	 ebool(POST_ARGS);
diff --git a/msec.c b/msec.c
index 9ab85ca6..058cb992 100644
--- a/msec.c
+++ b/msec.c
@@ -14,6 +14,10 @@
  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
 #include <stdlib.h>
 #include <string.h>
 #include <time.h>
diff --git a/out.c b/out.c
index dd584d7a..3ec0f319 100644
--- a/out.c
+++ b/out.c
@@ -14,6 +14,10 @@
  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
 #include <sys/types.h>
 
 #include <assert.h>
@@ -45,10 +49,6 @@
 		(t) = 3; } \
 	while (/* CONSTCOND */ 0)
 
-#ifdef __linux__
-extern	size_t	  strlcat(char *, const char *, size_t);
-#endif
-
 /* 
  * Convert a `scaling unit' to a consistent form, or fail.  Scaling
  * units are documented in groff.7, mdoc.7, man.7.
diff --git a/st.c b/st.c
index 1c9a45a0..05593eb2 100644
--- a/st.c
+++ b/st.c
@@ -14,6 +14,10 @@
  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
 #include <stdlib.h>
 #include <string.h>
 #include <time.h>
diff --git a/term.c b/term.c
index 4ab35a2d..ede55851 100644
--- a/term.c
+++ b/term.c
@@ -14,6 +14,10 @@
  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
 #include <sys/types.h>
 
 #include <assert.h>
diff --git a/test-strlcat.c b/test-strlcat.c
new file mode 100644
index 00000000..5d450dd0
--- /dev/null
+++ b/test-strlcat.c
@@ -0,0 +1,8 @@
+#include <string.h>
+
+int
+main(int argc, char **argv)
+{
+	strlcat(argv[0], argv[1], 10);
+	return 0;
+}
diff --git a/test-strlcpy.c b/test-strlcpy.c
new file mode 100644
index 00000000..c7d182aa
--- /dev/null
+++ b/test-strlcpy.c
@@ -0,0 +1,8 @@
+#include <string.h>
+
+int
+main(int argc, char **argv)
+{
+	strlcpy(argv[0], argv[1], 10);
+	return 0;
+}
diff --git a/tree.c b/tree.c
index 21137e1f..bf498a87 100644
--- a/tree.c
+++ b/tree.c
@@ -14,6 +14,10 @@
  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
 #include <assert.h>
 #include <stdio.h>
 #include <stdlib.h>
diff --git a/vol.c b/vol.c
index c90be044..798129f0 100644
--- a/vol.c
+++ b/vol.c
@@ -14,6 +14,10 @@
  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
 #include <stdlib.h>
 #include <string.h>
 #include <time.h>