[file-roller] don't build session management support if the required libraries are not present

[Paolo Bacchilega <paobac src gnome org>]

commit d2afeebafa65854159b8a6071ae3e949a8548e12
Author: Paolo Bacchilega <paobac src gnome org>
Date:   Mon Aug 27 20:26:15 2012 +0200

    don't build session management support if the required libraries are not present

 configure.ac             |   38 ++++++++++++++++++++++++++++++++++++++
 copy-n-paste/Makefile.am |   18 ++++++++++++------
 src/main.c               |    2 --
 3 files changed, 50 insertions(+), 8 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 3c9b1d7..93100f7 100644
--- a/configure.ac
+++ b/configure.ac
@@ -240,6 +240,44 @@ fi
 AC_MSG_RESULT($enable_libarchive)
 AC_SUBST(LIBARCHIVE_LIBS)
 AC_SUBST(LIBARCHIVE_CFLAGS)
+dnl ===========================================================================
+dnl
+dnl SM Client
+dnl
+GDK_TARGET="$($PKG_CONFIG --variable target gdk-2.0)"
+
+AC_MSG_CHECKING([which smclient backend to use])
+AC_ARG_WITH([smclient],
+  [AS_HELP_STRING([--with-smclient=no|auto|xsmp],
+		  [Setting smclient backend (default:no)])],,
+		  [with_smclient=no])
+
+if test "$with_smclient" == "auto"; then
+  case "$GDK_TARGET" in
+    x11) with_smclient=xsmp ;;
+    *) with_smclient=no ;;
+  esac
+fi
+
+AC_MSG_RESULT([$with_smclient])
+
+if test "$with_smclient" != "no"; then
+  AC_DEFINE([WITH_SMCLIENT],[1],[Define if smclient is enabled])
+
+  case "$with_smclient" in
+    xsmp) SMCLIENT_PKGS="sm >= 1.0.0 ice" ;;
+    *) SMCLIENT_PKGS="" ;;
+  esac
+
+  PKG_CHECK_MODULES([SMCLIENT],[$SMCLIENT_PKGS])
+  AC_SUBST([SMCLIENT_CFLAGS])
+  AC_SUBST([SMCLIENT_LIBS])
+  AC_DEFINE(USE_SMCLIENT, 1, [Use a session menager])
+fi
+
+AM_CONDITIONAL([WITH_SMCLIENT],[test "$with_smclient" != "no"])
+AM_CONDITIONAL([WITH_SMCLIENT_XSMP],[test "$with_smclient" = "xsmp"])
+AM_CONDITIONAL([WITH_SMCLIENT_WIN32],[test "$with_smclient" = "win32"])
 
 dnl ******************************
 
diff --git a/copy-n-paste/Makefile.am b/copy-n-paste/Makefile.am
index 8cceb2b..b3313ae 100644
--- a/copy-n-paste/Makefile.am
+++ b/copy-n-paste/Makefile.am
@@ -5,11 +5,17 @@ noinst_LTLIBRARIES = libeggsmclient.la
 
 libeggsmclient_la_LIBADD = $(GTK_LIBS)
 libeggsmclient_la_CFLAGS = $(GTK_CFLAGS)
-libeggsmclient_la_SOURCES = eggdesktopfile.h \
-			    eggdesktopfile.c \
-			    eggsmclient.h \
-			    eggsmclient.c \
-			    eggsmclient-private.h \
-			    eggsmclient-xsmp.c
+
+libeggsmclient_la_SOURCES = 			\
+	eggdesktopfile.h 			\
+	eggdesktopfile.c
+
+if WITH_SMCLIENT
+libeggsmclient_la_SOURCES += 			\
+	eggsmclient.h 				\
+	eggsmclient.c 				\
+	eggsmclient-private.h 			\
+	eggsmclient-xsmp.c
+endif
 
 -include $(top_srcdir)/git.mk
diff --git a/src/main.c b/src/main.c
index 46a695f..38641d5 100644
--- a/src/main.c
+++ b/src/main.c
@@ -21,8 +21,6 @@
 
 #include <config.h>
 
-#define USE_SMCLIENT 1
-
 #include <string.h>
 #include <sys/types.h>
 #include <signal.h>