don't build thread related tests if evolution has been compiled with no

don't build thread related tests if evolution has been compiled with no

2000-02-10  bertrand  <Bertrand.Guiheneuf@aful.org>

	* tests/Makefile.am (THREAD_RELATED_TESTS): don't
	build thread related tests if evolution has been
	compiled with no thread support.

	* configure.in (have_pthread): allow user to enable/disable
	thread support at configure time
	(EXTRA_GNOME_CFLAGS):
	(EXTRA_GNOME_LIBS): thread support is directly
	included in this variable if enabled. No more
	EXTRA_GNOME_CFLAGS_THREADS
	Other special support should be added in
	EXTRA_GNOME_LIBS and EXTRA_GNOME_CFLAGS
	instead of redefining a new variable
	each time we want to add a new lib.
	(bonobo, ....)

	* camel/camel.c (camel_init): only try to initialize threads if
	we enabled threads support.

	* tests/ui-tests/Makefile.am (message_browser_LDADD): use
	EXTRA_GNOME_LIBS

	* configure.in (have_pthread): remove HAVE_PTHREADS
	variable. Define ENABLE_THREADS instead.

	* camel/Makefile.am: use ENABLE_THREADS not HAVE_PTHREADS
	to test if we build thread relateed code.

	* tests/Makefile.am: use EXTRA_GNOME_LIBS,
	not EXTRA_GNOME_LIBS_THREADS

I need to be able to disable thread support to use Insure.