xenomai: requires thread support

Fixes
http://autobuild.buildroot.org/results/c99/c9912b2c21594350945c8a64528bb6a9b34d6292/build-end.log.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

linux/Config.ext.in

@@ -3,6 +3,7 @@ menu "Linux Kernel Extensions"
 # Xenomai
 config BR2_LINUX_KERNEL_EXT_XENOMAI
 	bool "Adeos/Xenomai Real-time patch"
+	depends on BR2_TOOLCHAIN_HAS_THREADS
 	depends on BR2_i386 || BR2_x86_64 || BR2_arm || \
 		   BR2_bfin || BR2_powerpc || BR2_sh4
 	select BR2_PACKAGE_XENOMAI
@@ -15,6 +16,9 @@ config BR2_LINUX_KERNEL_EXT_XENOMAI
 	  ARM, 2.6.35.9, 2.6.37.6, 2.6.38.8, on NIOS2, 2.6.35, on
 	  PowerPC, 2.6.35.7, 2.6.36.4, 3.0.8.
 
+comment "xenomai requires thread support in toolchain"
+	depends on !BR2_TOOLCHAIN_HAS_THREADS
+
 config BR2_LINUX_KERNEL_EXT_XENOMAI_ADEOS_PATCH
 	depends on BR2_LINUX_KERNEL_EXT_XENOMAI
 	string "Path for Adeos patch file"

package/xenomai/Config.in

@@ -1,5 +1,9 @@
+comment "xenomai requires thread support in toolchain"
+	depends on !BR2_TOOLCHAIN_HAS_THREADS
+
 config BR2_PACKAGE_XENOMAI
 	bool "Xenomai Userspace"
+	depends on BR2_TOOLCHAIN_HAS_THREADS
 	depends on BR2_i386 || BR2_x86_64 || BR2_arm || \
 		   BR2_bfin || BR2_powerpc || BR2_sh4
 	help