From: Andre Noll <maan@systemlinux.org>
Date: Thu, 13 Feb 2014 17:59:00 +0000 (+0100)
Subject: build: Don't link with -lreadline if readline was not found.
X-Git-Tag: v0.5.2~6^2
X-Git-Url: http://git.tuebingen.mpg.de/?p=paraslash.git;a=commitdiff_plain;h=448c8f8e8c1c1eeb88ae468c0c3ab25bed6f2ac8

build: Don't link with -lreadline if readline was not found.

Currently, if libreadline is not installed, linking fails with

	ld: cannot find -lreadline

This patch makes the build succeed by linking para_client, para_audioc
and para_play without readline support in this case.
---

diff --git a/configure.ac b/configure.ac
index b456b53d..75194ffc 100644
--- a/configure.ac
+++ b/configure.ac
@@ -732,15 +732,17 @@ AC_CHECK_HEADERS([readline/readline.h], [
 ])
 
 if test "$have_readline" = "yes"; then
-	readline_ldflags="$readline_libs -lreadline"
-	AC_SEARCH_LIBS([rl_free_keymap], [readline], [], [have_readline="no"])
+	readline_ldflags="$readline_libs"
+	AC_SEARCH_LIBS([rl_free_keymap], [readline], [
+		readline_ldflags="$readline_ldflags -lreadline"
+	], [have_readline="no"])
 	if test "$have_readline" = "no"; then # try with -lcurses
                 # clear cache
 		AC_MSG_NOTICE([trying again with -lcurses])
                 unset ac_cv_search_rl_free_keymap 2> /dev/null
 		AC_SEARCH_LIBS([rl_free_keymap], [readline], [
 			have_readline=yes
-			readline_ldflags="$readline_ldflags -lcurses"
+			readline_ldflags="$readline_ldflags -lreadline -lcurses"
 		], [], [-lcurses])
 	fi
 	if test "$have_readline" = "no"; then # try with -ltermcap
@@ -749,7 +751,7 @@ if test "$have_readline" = "yes"; then
                 unset ac_cv_search_rl_free_keymap 2> /dev/null
 		AC_SEARCH_LIBS([rl_free_keymap], [readline], [
 			have_readline=yes
-			readline_ldflags="$readline_ldflags -ltermcap"
+			readline_ldflags="$readline_ldflags -lreadline -ltermcap"
 		], [], [-ltermcap])
 	fi
 fi