gtkwave: fix cross compilation

Closes #8957.

srcpkgs/gtkwave/template

@@ -1,7 +1,7 @@
 # Template file for 'gtkwave'
 pkgname=gtkwave
 version=3.3.86
-revision=1
+revision=2
 build_style=gnu-configure
 hostmakedepends="pkg-config gperf"
 makedepends="gtk+-devel tk-devel liblzma-devel"
@@ -12,7 +12,9 @@ homepage="http://gtkwave.sourceforge.net/"
 distfiles="${SOURCEFORGE_SITE}/$pkgname/$pkgname-$version.tar.gz"
 checksum=dd012485d60b519c9fe2361777be412b483ad87938c9daee9ab99d09e18c30d0
 
-nocross="http://build.voidlinux.eu/builders/armv7l_builder/builds/21190/steps/shell_3/logs/stdio"
+if [ -n "$CROSS_BUILD" ]; then
+	configure_args="--with-tcl=${XBPS_CROSS_BASE}/usr/lib --with-tk=${XBPS_CROSS_BASE}/usr/lib"
+fi
 
 post_install() {
 	# MIT license