From ffebf005854b6308485fd375944995730e146be4 Mon Sep 17 00:00:00 2001
From: Nicholas Marriott <nicholas.marriott@gmail.com>
Date: Mon, 2 Jul 2018 13:36:44 +0100
Subject: [PATCH] Solaris 11.4 and later prefers mdoc, from Alan Coopersmith.

---
 configure.ac | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/configure.ac b/configure.ac
index f6ed390e..5b4bc4a2 100644
--- a/configure.ac
+++ b/configure.ac
@@ -610,7 +610,16 @@ case "$host_os" in
 	*solaris*)
 		AC_MSG_RESULT(sunos)
 		PLATFORM=sunos
-		MANFORMAT=man
+		case `/usr/bin/nroff --version 2>&1` in
+			*GNU*)
+				# Solaris 11.4 and later use GNU groff.
+				MANFORMAT=mdoc
+				;;
+			*)
+				# Solaris 2.0 to 11.3 use AT&T nroff.
+				MANFORMAT=man
+				;;
+		esac
 		;;
 	*hpux*)
 		AC_MSG_RESULT(hpux)