[PATCH] add support for out-of-tree platform implementation

[Rob Taylor <rob taylor codethink co uk>]

This allow the passing of 'none' to the --with-platform configure 
option. The patch also fixes up the python bindings to work in this 
case. Other bindings will probably also need some simple changes.

Thanks,
Rob

diff --git a/ChangeLog b/ChangeLog
index 922dc04..749b8e6 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,11 @@
 2008-05-12  Rob Taylor  <rob taylor codethink co uk>
 
+	* configure.ac: Add --with-platform option 'none'.
+	* bindings/python/Makefile.am: Fix up python bindings to work when
+	built with no platform.
+
+2008-05-12  Rob Taylor  <rob taylor codethink co uk>
+
 	* libtinymail/tny-error.c: Fix documentation
 
 2008-05-12  Rob Taylor  <rob taylor codethink co uk>
diff --git a/bindings/python/Makefile.am b/bindings/python/Makefile.am
index 80b53b3..2501f85 100644
--- a/bindings/python/Makefile.am
+++ b/bindings/python/Makefile.am
@@ -2,7 +2,7 @@ INCLUDES = $(PYTHON_INCLUDES) $(LIBTINYMAIL_CFLAGS) $(PYGTK_CFLAGS) \
 	$(LIBTINYMAILUI_GTK_CFLAGS) $(TINYMAIL_PYTHON_CFLAGS) \
 	-I$(top_srcdir)/libtinymail -I$(top_srcdir)/libtinymailui \
 	-I$(top_srcdir)/libtinymailui-gtk -I$(top_srcdir)/libtinymail-camel \
-	-I$(top_srcdir)/$(PLATFORMDIR) -I$(top_srcdir)/libtinymail-camel/camel-lite
+	@PLATFORM_CFLAGS@ -I$(top_srcdir)/libtinymail-camel/camel-lite
 
 common_ldflags = -module -avoid-version
 
@@ -46,7 +46,7 @@ camel_la_LDFLAGS = $(common_ldflags) -export-symbols-regex initcamel
 camel_la_LIBADD = $(LIBTINYMAILUI_LIBS) $(LIBTINYMAIL_LIBS) \
         $(TINYMAIL_PYTHON_LIBS) \
         $(top_builddir)/libtinymail/libtinymail-$(API_VERSION).la \
-        $(top_builddir)/$(PLATFORMDIR)/$(PLATFORMDIR)-$(API_VERSION).la \
+        @PLATFORM_LIBS@ \
         $(top_builddir)/libtinymail-camel/libtinymail-camel-$(API_VERSION).la
 camel_la_SOURCES = tinymail-camelmodule.c pytny-session-camel.c
 nodist_camel_la_SOURCES = tinymail-camel-glue.c
diff --git a/configure.ac b/configure.ac
index e35bec5..4204eb4 100644
--- a/configure.ac
+++ b/configure.ac
@@ -74,6 +74,8 @@ enable_deprecated=true
 PLATFORMDIR=libtinymail-gnome-desktop
 PLATFORMSPECIFICNAME=Gnome
 PLATFORM=1
+PLATFORM_LIBS='$(top_builddir)/$(PLATFORMDIR)/$(PLATFORMDIR)-$(API_VERSION).la'
+PLATFORM_CFLAGS='-I$(top_srcdir)/$(PLATFORM)'
 
 dnl ### Debugging ###
 AC_ARG_ENABLE(debug,
@@ -135,6 +137,15 @@ AC_HELP_STRING([--with-platform=gnome-desktop],
         build_demoui=true
         PLATFORM=4
         ;;
+  none)
+	PLATFORMDIR=
+	PLATFORMSPECIFICNAME=
+	build_uigtk=false
+	build_demoui=false
+	PLATFORM=0
+	PLATFORM_LIBS=
+	PLATFORM_CFLAGS=
+	;;
   *) 
 	PLATFORMDIR=${with_platform}
 	PLATFORMSPECIFICNAME=
@@ -147,6 +158,8 @@ esac], [PLATFORMDIR=libtinymail-gnome-desktop
 AC_SUBST(PLATFORMDIR)
 AC_SUBST(PLATFORM)
 AC_SUBST(PLATFORMSPECIFICNAME)
+AC_SUBST(PLATFORM_LIBS)
+AC_SUBST(PLATFORM_CFLAGS)
 
 dnl ### Select the html component ##
 AC_ARG_WITH(html-component,