vala: fix crossbuild

srcpkgs/vala/patches/fix-cross.patch

@@ -0,0 +1,23 @@
+--- configure.ac.orig	2017-10-06 09:45:08.321772985 +0200
++++ configure.ac	2017-10-06 09:46:58.900866875 +0200
+@@ -104,16 +104,15 @@ cgraph_tmp_LIBADD="$LIBADD"
+ cgraph_tmp_CFLAGS="$CFLAGS"
+ LIBADD="$LIBADD $LIBGVC_LIBS"
+ CFLAGS="$CFLAGS $LIBGVC_CFLAGS"
+-AC_RUN_IFELSE(
++AC_COMPILE_IFELSE(
+ 	[AC_LANG_SOURCE([
+ 		#include <gvc.h>
+ 
+ 		int main(void) {
+-			#ifdef WITH_CGRAPH
+-				return 0;
+-			#else
+-				return -1;
++			#ifndef WITH_CGRAPH
++			#error
+ 			#endif
++			return 0;
+ 		}
+ 	])], [
+ 		AC_MSG_RESULT([yes])

srcpkgs/vala/template

@@ -3,7 +3,7 @@ pkgname=vala
 version=0.38.1
 revision=1
 build_style=gnu-configure
-hostmakedepends="pkg-config flex libxslt"
+hostmakedepends="pkg-config flex libxslt automake libtool"
 makedepends="libglib-devel libfl-devel graphviz-devel"
 short_desc="Compiler for the GObject type system"
 maintainer="Enno Boland <gottox@voidlinux.eu>"
@@ -12,6 +12,10 @@ license="LGPL-2.1"
 distfiles="${GNOME_SITE}/vala/${version%.*}/vala-${version}.tar.xz"
 checksum=1035344f3ba50a572894c0aed3f794dd0efb9f08fce1c1d0cc537936e9a05084
 
+pre_configure() {
+  autoreconf -fi
+}
+
 libvala_package() {
 	short_desc+=" - shared library"
 	pkg_install() {