icu: cross build and dbg support.

srcpkgs/icu/template

@@ -2,10 +2,9 @@
 pkgname=icu
 version=49.1.2
 _distver="$(echo $version|sed -e 's|\.|_|g')"
-revision=1
+revision=2
 wrksrc=icu
 build_wrksrc=source
-build_style=gnu-configure
 subpackages="icu-devel icu-libs"
 short_desc="Robust and full-featured Unicode services"
 maintainer="Juan RP <xtraeme@gmail.com>"
@@ -31,6 +30,37 @@ long_desc="
  - Transliteration
  - Word, line and sentence breaks"
 
-post_install() {
+pre_configure() {
+	if [ -n "$XBPS_CROSS_BUILD" ]; then
+		# Configure and build for host.
+		mkdir host-build
+		cd host-build
+		env CC=gcc LD=ld CXX=g++ AR=ar RANLIB=ranlib \
+			AS=as STRIP=strip CFLAGS="-Os" CXXFLAGS="-Os" \
+			../configure --prefix=/
+		make ${makejobs}
+		mkdir -p ${wrksrc}/host-icu/config
+		cp config/icucross.mk ${wrksrc}/host-icu/config
+		make DESTDIR=${wrksrc}/host-icu install
+		mv ${wrksrc}/host-icu/sbin/* ${wrksrc}/host-icu/bin
+	fi
+}
+
+do_configure() {
+	if [ -n "$XBPS_CROSS_BUILD" ]; then
+		./configure ${CONFIGURE_SHARED_ARGS} \
+			--with-cross-build=${wrksrc}/host-icu
+	else
+		./configure ${CONFIGURE_SHARED_ARGS}
+	fi
+}
+
+do_build() {
+	make ${makejobs}
+}
+
+do_install() {
+	make DESTDIR=${DESTDIR} install
+
 	vinstall $wrksrc/license.html 644 usr/share/licenses/icu
 }