clamav: enable IPv6 for cross builds

srcpkgs/clamav/template

@@ -1,7 +1,7 @@
 # Template file for 'clamav'
 pkgname=clamav
 version=0.102.3
-revision=1
+revision=2
 build_style=gnu-configure
 # XXX: system llvm is too new (< 3.7 required)
 # Shipped llvm does not build with gcc6
@@ -37,6 +37,10 @@ do_configure() {
 	# Disable detection of sys/cdefs.h (it's obsolete)
 	sed -i configure -e 's; sys/cdefs\.h$;;'
 	sed -i configure -e 's;3\.7;3.9;'
+	# Enable IPv6 for cross builds
+	if [ "$CROSS_BUILD" ]; then
+		configure_args+=" have_cv_ipv6=yes"
+	fi
 	# Need to set PCRE_HOME to make --with-pcre=/usr work
 	PCRE_HOME=/usr ./configure ${configure_args}
 }