otpw: fix cross build and build with out {C,LD}FLAGS.

srcpkgs/otpw/template

@@ -1,9 +1,7 @@
 # Template file for 'otpw'
 pkgname=otpw
 version=1.5
-revision=1
-build_style=gnu-makefile
-make_install_args="PAMLIB=/usr/lib/security/"
+revision=2
 conf_files="/etc/pam.d/ssh-otpw"
 makedepends="pam-devel"
 short_desc="A one-time password login package"
@@ -13,6 +11,10 @@ homepage="http://www.cl.cam.ac.uk/~mgk25/otpw.html"
 distfiles="https://www.cl.cam.ac.uk/%7Emgk25/download/otpw-${version}.tar.gz"
 checksum=98aca38a61c7713677b96f24426ca7053480c0fd077d91b1e99bc9f92ccb832a
 
+do_build() {
+	sed -i "/ld --shared/s,ld,$LD," Makefile
+	make CC=$CC LD=$LD CFLAGS="$CFLAGS" LDFLAGS="$LDFLAGS" ${makejobs}
+}
 do_install() {
 	vinstall pam_otpw.so 755 /usr/lib/security
 	vman pam_otpw.8