package/uftp: needs MMU, threads and wchar

Fixes:
 - http://autobuild.buildroot.org/results/47dd067dfdcaae99d50216f59ea6af115d8f1e1e

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/uftp/Config.in

@@ -1,7 +1,14 @@
 config BR2_PACKAGE_UFTP
 	bool "uftp"
+	depends on BR2_USE_MMU # fork()
+	depends on BR2_TOOLCHAIN_HAS_THREADS
+	depends on BR2_USE_WCHAR
 	select BR2_PACKAGE_OPENSSL
 	help
 	  Encrypted UDP based FTP with multicast.
 
 	  http://uftp-multicast.sourceforge.net/
+
+comment "uftp needs a toolchain w/ threads, wchar"
+	depends on BR2_USE_MMU
+	depends on !BR2_TOOLCHAIN_HAS_THREADS || !BR2_USE_WCHAR