iputils: disable on older uclibc versions

Disable when using a uclibc version before 0.9.33 since dn_comp
function support was added in this version. Also disabling on AVR32
since any AVR32 toolchain will be based on a uclibc version older
than 0.9.33 (for using an external AVR32 toolchain).

[Peter: use dn_comp instead of __dn_comp]
Signed-off-by: Ryan Barnett <rjbarnet@rockwellcollins.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/iputils/Config.in

@@ -2,6 +2,10 @@ config BR2_PACKAGE_IPUTILS
 	bool "iputils"
 	select BR2_OPENSSL if BR2_INET_IPV6
 	depends on BR2_USE_MMU # fork()
+	# requires dn_comp (only available in since uclibc 0.9.33)
+	depends on !BR2_avr32
+	depends on !BR2_UCLIBC_VERSION_0_9_31 && \
+		!BR2_UCLIBC_VERSION_0_9_32
 	help
 	  This package is set of small useful utilities for Linux networking.
 	  It includes complete versions of ping, traceroute, etc.