1 files changed, 71 insertions, 0 deletions
diff --git a/support/rlvers.sh b/support/rlvers.sh
new file mode 100755
index 00000000..12abeda9
--- /dev/null
+++ b/support/rlvers.sh
@@ -0,0 +1,71 @@
+#! /bin/sh
+#
+# rlvers.sh -- run a program that prints out the readline version number
+#	       using locally-installed readline libraries
+#
+
+PROGNAME=`basename $0`
+
+trap 'rm -f /tmp/rlvers /tmp/rlvers.?' 0 1 2 3 6 15
+
+# defaults
+CC=cc
+RL_LIBDIR=/usr/local/lib
+
+while [ $# -gt 0 ]; do
+	case "$1" in
+	-C)	shift ; CC="$1"; shift ;;
+	-L)	shift ; RL_LIBDIR="$1" ; shift ;;
+	-v)	shift ; verbose=y ;;
+	--)	shift ; break ;;
+	*)	echo "${PROGNAME}: usage: $PROGNAME [-C compiler] [-L libdir] [-v]" >&2 ; exit 2;;
+	esac
+done
+
+# if someone happened to install examples/rlversion, use it (it's not
+# installed by default)
+if test -f ${RL_LIBDIR}/rlversion ; then
+	if [ -n "$verbose" ]; then
+		echo "${PROGNAME}: using installed rlversion from ${RL_LIBDIR}/rlversion"
+	fi
+	v=`${RL_LIBDIR}/rlversion 2>/dev/null`
+	case "$v" in
+	unknown | "")	echo 0 ;;
+	*)		echo "$v" ;;
+	esac
+	exit 0
+fi
+
+if [ -n "$verbose" ]; then
+	echo "${PROGNAME}: using ${RL_LIBDIR} to find libreadline"
+	echo "${PROGNAME}: attempting program compilation"
+fi
+
+cat > /tmp/rlvers.c << EOF
+#include <stdio.h>
+extern char *rl_library_version;
+
+main()
+{
+	printf("%s\n", rl_library_version ? rl_library_version : "0");
+	exit(0);
+}
+EOF
+
+if eval ${CC} -L${RL_LIBDIR} -o /tmp/rlvers /tmp/rlvers.c -lreadline -ltermcap -lcurses;
+then
+	v=`/tmp/rlvers`
+else
+	if [ -n "$verbose" ] ; then
+		echo "${PROGNAME}: compilation failed: status $?"
+		echo "${PROGNAME}: using version 0"
+	fi
+	v=0
+fi
+
+case "$v" in
+unknown | "")	echo 0 ;;
+*)		echo "$v" ;;
+esac
+
+exit 0