Finally use __progname, err(3) and warn(3).

That's more readable and less error-prone than fumbling around
with argv[0], fprintf(3), strerror(3), perror(3), and exit(3).

It's a bad idea to boycott good interfaces merely because standards
committees ignore them.  Instead, let's provide compatibility modules
for archaic systems (like commercial Solaris) that still don't have
them.  The compat module has an UCB Copyright (c) 1993...

1 files changed, 13 insertions, 0 deletions

diff --git a/configure b/configure
index 7a3bb306..7bafcdde 100755
--- a/configure
+++ b/configure
@@ -43,12 +43,14 @@ BUILD_DB=1
 BUILD_CGI=0
 
 HAVE_DIRENT_NAMLEN=
+HAVE_ERR=
 HAVE_FGETLN=
 HAVE_FTS=
 HAVE_GETSUBOPT=
 HAVE_ISBLANK=
 HAVE_MKDTEMP=
 HAVE_MMAP=
+HAVE_PROGNAME=
 HAVE_REALLOCARRAY=
 HAVE_STRCASESTR=
 HAVE_STRINGLIST=
@@ -171,12 +173,14 @@ runtest() {
 
 # --- library functions ---
 runtest dirent-namlen	DIRENT_NAMLEN	|| true
+runtest err		ERR		|| true
 runtest fgetln		FGETLN		|| true
 runtest fts		FTS		|| true
 runtest getsubopt	GETSUBOPT	|| true
 runtest isblank		ISBLANK		|| true
 runtest mkdtemp		MKDTEMP		|| true
 runtest mmap		MMAP		|| true
+runtest progname	PROGNAME	|| true
 runtest reallocarray	REALLOCARRAY	|| true
 runtest strcasestr	STRCASESTR	|| true
 runtest stringlist	STRINGLIST	|| true
@@ -286,16 +290,19 @@ echo
 echo "#define MAN_CONF_FILE \"/etc/${MANM_MANCONF}\""
 echo "#define MANPATH_DEFAULT \"${MANPATH_DEFAULT}\""
 [ -n "${OSNAME}" ] && echo "#define OSNAME \"${OSNAME}\""
+[ ${HAVE_PROGNAME} -eq 0 ] && echo "#define __progname mandoc_progname"
 [ -n "${HOMEBREWDIR}" ] && echo "#define HOMEBREWDIR \"${HOMEBREWDIR}\""
 
 cat << __HEREDOC__
 #define HAVE_DIRENT_NAMLEN ${HAVE_DIRENT_NAMLEN}
+#define HAVE_ERR ${HAVE_ERR}
 #define HAVE_FGETLN ${HAVE_FGETLN}
 #define HAVE_FTS ${HAVE_FTS}
 #define HAVE_GETSUBOPT ${HAVE_GETSUBOPT}
 #define HAVE_ISBLANK ${HAVE_ISBLANK}
 #define HAVE_MKDTEMP ${HAVE_MKDTEMP}
 #define HAVE_MMAP ${HAVE_MMAP}
+#define HAVE_PROGNAME ${HAVE_PROGNAME}
 #define HAVE_REALLOCARRAY ${HAVE_REALLOCARRAY}
 #define HAVE_STRCASESTR ${HAVE_STRCASESTR}
 #define HAVE_STRINGLIST ${HAVE_STRINGLIST}
@@ -334,6 +341,12 @@ cat << __HEREDOC__
 
 __HEREDOC__
 
+if [ ${HAVE_ERR} -eq 0 ]; then
+	echo "extern	void	  err(int, const char *, ...);"
+	echo "extern	void	  warn(const char *, ...);"
+	echo "extern	void	  warnx(const char *, ...);"
+fi
+
 [ ${HAVE_FGETLN} -eq 0 ] && \
 	echo "extern	char	 *fgetln(FILE *, size_t *);"