===================================================================
RCS file: /cvs/mandoc/configure,v
retrieving revision 1.46
retrieving revision 1.47
diff -u -p -r1.46 -r1.47
--- mandoc/configure	2016/07/20 00:23:14	1.46
+++ mandoc/configure	2016/07/20 14:03:06	1.47
@@ -1,5 +1,7 @@
 #!/bin/sh
 #
+# $Id: configure,v 1.47 2016/07/20 14:03:06 schwarze Exp $
+#
 # Copyright (c) 2014, 2015, 2016 Ingo Schwarze <schwarze@openbsd.org>
 #
 # Permission to use, copy, modify, and distribute this software for any
@@ -39,6 +41,7 @@ CFLAGS="-g -W -Wall -Wmissing-prototypes -Wstrict-prot
 CFLAGS="${CFLAGS} -Wno-unused-parameter"
 LDADD=
 LDFLAGS=
+LD_NANOSLEEP=
 LD_OHASH=
 STATIC="-static"
 
@@ -52,6 +55,7 @@ HAVE_GETLINE=
 HAVE_GETSUBOPT=
 HAVE_ISBLANK=
 HAVE_MKDTEMP=
+HAVE_NANOSLEEP=
 HAVE_OHASH=
 HAVE_PLEDGE=
 HAVE_PROGNAME=
@@ -197,6 +201,20 @@ runtest strtonum	STRTONUM	|| true
 runtest vasprintf	VASPRINTF	|| true
 runtest wchar		WCHAR		|| true
 
+# --- nanosleep ---
+if [ -n "${LD_NANOSLEEP}" ]; then
+	runtest nanosleep NANOSLEEP "${LD_NANOSLEEP}" || true
+elif singletest nanosleep NANOSLEEP; then
+	:
+elif runtest nanosleep NANOSLEEP "-lrt"; then
+	LD_NANOSLEEP="-lrt"
+fi
+if [ "${HAVE_NANOSLEEP}" -eq 0 ]; then
+	echo "FATAL: nanosleep: no" 1>&2
+	echo "FATAL: nanosleep: no" 1>&3
+	exit 1
+fi
+
 # --- ohash ---
 if ismanual ohash "${HAVE_OHASH}"; then
 	:
@@ -212,7 +230,7 @@ if [ "${HAVE_OHASH}" -eq 0 ]; then
 fi
 
 # --- LDADD ---
-LDADD="${LDADD} ${LD_OHASH} -lz"
+LDADD="${LDADD} ${LD_NANOSLEEP} ${LD_OHASH} -lz"
 echo "LDADD=\"${LDADD}\"" 1>&2
 echo "LDADD=\"${LDADD}\"" 1>&3
 echo 1>&3