From ad70b0fe0342a70797a36e0f278da76c2dd2791e Mon Sep 17 00:00:00 2001
From: Ben Kibbey <bjk@luxsci.net>
Date: Sun, 4 Sep 2016 15:44:11 -0400
Subject: [PATCH] pwmc: Check for free_history_entry().

Not all readline implementations have this.
---
 configure.ac  | 8 ++++++++
 m4/libtool.m4 | 1 -
 src/pwmc.c    | 2 ++
 3 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/configure.ac b/configure.ac
index b0175631..d0bb08f1 100644
--- a/configure.ac
+++ b/configure.ac
@@ -138,6 +138,14 @@ if test "x$WITH_INTERACTIVE" = "xyes"; then
     if test "x$vl_cv_lib_readline" != "xno"; then
 	READLINE_LIBS="$vl_cv_lib_readline"
 	AC_SUBST(READLINE_LIBS)
+	ORIG_LIBS="$LIBS"
+	LIBS="$READLINE_LIBS"
+	AC_TRY_LINK_FUNC([free_history_entry], [ac_cv_free_history_entry=yes])
+	LIBS="$ORIG_LIBS"
+	if test "x$ac_cv_free_history_entry" = "xyes"; then
+	    AC_DEFINE(HAVE_FREE_HISTORY_ENTRY, 1,
+		      [Define if your libreadline has free_history_entry().])
+	fi
     else
 	AC_MSG_ERROR([Missing or incomplete readline installation.])
 	WITH_INTERACTIVE="no"
diff --git a/m4/libtool.m4 b/m4/libtool.m4
index 10ab2844..ee80844b 100644
--- a/m4/libtool.m4
+++ b/m4/libtool.m4
@@ -728,7 +728,6 @@ _LT_CONFIG_SAVE_COMMANDS([
     cat <<_LT_EOF >> "$cfgfile"
 #! $SHELL
 # Generated automatically by $as_me ($PACKAGE) $VERSION
-# Libtool was configured on host `(hostname || uname -n) 2>/dev/null | sed 1q`:
 # NOTE: Changes made to this file will be lost: look at ltmain.sh.
 
 # Provide generalized library-building support services.
diff --git a/src/pwmc.c b/src/pwmc.c
index 37201869..71ff12ac 100644
--- a/src/pwmc.c
+++ b/src/pwmc.c
@@ -1661,7 +1661,9 @@ add_history_item (const char *line)
       char *s;
 
       p = remove_history (i);
+#ifdef HAVE_FREE_HISTORY_ENTRY
       s = free_history_entry (p);
+#endif
       free (s);
     }
 
-- 
2.11.4.GIT