From 408458ad84180244b6a2ac327d13685bfb2b0867 Mon Sep 17 00:00:00 2001
From: Andre Noll <maan@systemlinux.org>
Date: Thu, 25 Aug 2011 21:53:42 +0200
Subject: [PATCH] configure: Introduce checks for libreadline.

This adds interactive.o to the object list of para_client if readline
was found and links para_client against libreadline in this case.

The new source files interactive.c and interactive.h are empty for now.
---
 configure.ac  | 61 +++++++++++++++++++++++++++++++++++++++++++++++++++
 error.h       |  1 +
 interactive.c |  0
 interactive.h |  0
 4 files changed, 62 insertions(+)
 create mode 100644 interactive.c
 create mode 100644 interactive.h

diff --git a/configure.ac b/configure.ac
index 6415668b..11c64067 100644
--- a/configure.ac
+++ b/configure.ac
@@ -864,7 +864,67 @@ fi
 CPPFLAGS="$OLD_CPPFLAGS"
 LDFLAGS="$OLD_LDFLAGS"
 LIBS="$OLD_LIBS"
+############################################################# readline
+OLD_CPPFLAGS="$CPPFLAGS"
+OLD_LD_FLAGS="$LDFLAGS"
+OLD_LIBS="$LIBS"
+
+have_readline="yes"
+AC_ARG_WITH(readline_headers, [AC_HELP_STRING(--with-readline-headers=dir,
+	[look for libreadline header files also in dir])])
+if test -n "$with_readline_headers"; then
+	readline_cppflags="-I$with_readline_headers"
+	CPPFLAGS="$CPPFLAGS $readline_cppflags"
+fi
 
+AC_ARG_WITH(readline_libs, [AC_HELP_STRING(--with-readline-libs=dir,
+	[look for readline library also in dir])])
+if test -n "$with_readline_libs"; then
+	readline_libs="-L$with_readline_libs"
+	LDFLAGS="$LDFLAGS $readline_libs"
+fi
+msg="no interactive cli support"
+AC_CHECK_HEADERS([readline/readline.h], [
+	], [
+	have_readline="no"
+	AC_MSG_WARN([readline/readline.h not found, $msg])
+])
+if test "$have_readline" = "yes"; then
+	readline_libs="$readline_libs -lreadline"
+	AC_SEARCH_LIBS([rl_replace_line], [readline], [], [have_readline="no"])
+	if test "$have_readline" = "no"; then # try with -lcurses
+                # clear cache
+		AC_MSG_NOTICE([trying again with -lcurses])
+                unset ac_cv_search_rl_replace_line 2> /dev/null
+		AC_SEARCH_LIBS([rl_replace_line], [readline], [
+			have_readline=yes
+			readline_libs="$readline_libs -lcurses"
+		], [], [-lcurses])
+	fi
+	if test "$have_readline" = "no"; then # try with -ltermcap
+                # clear cache
+		AC_MSG_NOTICE([trying again with -ltermcap])
+                unset ac_cv_search_rl_replace_line 2> /dev/null
+		AC_SEARCH_LIBS([rl_replace_line], [readline], [
+			have_readline=yes
+			readline_libs="$readline_libs -ltermcap"
+		], [], [-ltermcap])
+	fi
+fi
+
+if test "$have_readline" = "yes"; then
+	all_errlist_objs="$all_errlist_objs interactive"
+	client_errlist_objs="$client_errlist_objs interactive"
+	client_ldflags="$client_ldflags $readline_libs"
+	AC_SUBST(readline_cppflags)
+	AC_DEFINE(HAVE_READLINE, 1, define to 1 to turn on readline support)
+else
+	AC_MSG_WARN([libreadline not found or unusable])
+fi
+CPPFLAGS="$OLD_CPPFLAGS"
+LDFLAGS="$OLD_LDFLAGS"
+LIBS="$OLD_LIBS"
+#############################################################
 
 
 AC_SUBST(install_sh, [$INSTALL])
@@ -1007,6 +1067,7 @@ AC_MSG_NOTICE([
 paraslash configuration:
 ~~~~~~~~~~~~~~~~~~~~~~~~
 unix socket credentials: $have_ucred
+readline (interactive CLIs): $have_readline
 audio formats supported by para_server/para_afh: $server_audio_formats
 id3 version2 support: $have_libid3tag
 filters supported by para_audiod/para_filter: $filters
diff --git a/error.h b/error.h
index b3eb7e6e..ab7aed25 100644
--- a/error.h
+++ b/error.h
@@ -440,6 +440,7 @@ extern const char **para_errlist[];
 #define CHUNK_QUEUE_ERRORS \
 	PARA_ERROR(QUEUE, "packet queue overrun"), \
 
+#define INTERACTIVE_ERRORS
 
 /** \endcond errors */
 
diff --git a/interactive.c b/interactive.c
new file mode 100644
index 00000000..e69de29b
diff --git a/interactive.h b/interactive.h
new file mode 100644
index 00000000..e69de29b
-- 
2.39.5