libtool: fix include paths when cross compiling

Fix library and object include paths.
Fix ntl build by directly assigning cc/cxx/etc instead of using := assignment.

srcpkgs/libtool/template

@@ -1,7 +1,7 @@
 # Template file for 'libtool'
 pkgname=libtool
 version=2.4.7
-revision=3
+revision=4
 build_style=gnu-configure
 hostmakedepends="texinfo perl automake help2man xz gnulib tar"
 depends="tar sed grep"
@@ -38,8 +38,8 @@ post_install() {
 	# things that need to go; the target libtool script is meant to be used
 	# in native environments, not in cross environments, so patch the script
 	if [ "$CROSS_BUILD" ]; then
-		# e.g. AR="armv7l-linux-gnueabihf-ar" becomes AR="${AR:=ar}"
-		vsed -i -e "s,\([A-Z]\+\)=\"${XBPS_CROSS_TRIPLET}\-\(.*\)\",\1=\$\{\1:=\2\},g" \
+		# e.g. AR="armv7l-linux-gnueabihf-ar" becomes AR="ar"
+		vsed -i -e "s,\([A-Z]\+\)=\"${XBPS_CROSS_TRIPLET}\-\(.*\)\",\1=\"\2\",g" \
 		 ${PKGDESTDIR}/usr/bin/libtool
 
 		# clear out any sysroot present
@@ -50,6 +50,20 @@ post_install() {
 		vsed -i -e "s,\-I${XBPS_CROSS_BASE}/usr/include,,g" \
 		 ${PKGDESTDIR}/usr/bin/libtool
 
+		# Strip cross sysroot from paths
+		vsed -i -e "s,${XBPS_CROSS_BASE},,g" \
+		 ${PKGDESTDIR}/usr/bin/libtool
+
+		if [ "$XBPS_TARGET_WORDSIZE" = "64" ]; then
+			vsed -i \
+			 -e "s,/${XBPS_CROSS_TRIPLET}/lib/../lib64,/lib64,g" \
+			 ${PKGDESTDIR}/usr/bin/libtool
+		else
+			vsed -i \
+			 -e "s,/${XBPS_CROSS_TRIPLET}/lib,/lib,g" \
+			 ${PKGDESTDIR}/usr/bin/libtool
+		fi
+
 		# canonicalize host_alias, replace build(_alias,_os)
 		_canonical_host=$(grep "^host=" ${PKGDESTDIR}/usr/bin/libtool | sed 's/host=//')
 		_host_os=$(grep "^host_os=" ${PKGDESTDIR}/usr/bin/libtool | sed 's/host_os=//')