cwiid: add missing indirect dependency on atomics for wmgui

Also add a comment for cwiid itself.

Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/cwiid/Config.in

@@ -15,6 +15,7 @@ config BR2_PACKAGE_CWIID
 if BR2_PACKAGE_CWIID
 config BR2_PACKAGE_CWIID_WMGUI
 	bool "wmgui"
+	depends on BR2_ARCH_HAS_ATOMICS # libgtk2 -> cairo
 	depends on BR2_PACKAGE_XORG7 # libgtk2
 	depends on BR2_USE_WCHAR # libgtk2 -> libglib2
 	depends on BR2_TOOLCHAIN_HAS_THREADS # libgtk2 -> libglib2
@@ -23,3 +24,8 @@ config BR2_PACKAGE_CWIID_WMGUI
 	select BR2_PACKAGE_LIBGLIB2
 	select BR2_PACKAGE_LIBGTK2
 endif
+
+comment "cwiid needs a toolchain w/ dynamic lib, threads, wchar"
+	depends on BR2_STATIC_LIBS || !BR2_USE_WCHAR || !BR2_TOOLCHAIN_HAS_THREADS
+	depends on !BR2_avr32
+	depends on !BR2_USE_MMU