diff -aur opensc.pristine/PKGBUILD opensc.new/PKGBUILD
--- opensc.pristine/PKGBUILD	2013-02-07 12:12:58.523282963 +0000
+++ opensc.new/PKGBUILD	2013-02-05 14:24:54.775385096 +0000
@@ -29,6 +29,7 @@
     --enable-openssl \
     --enable-pcsc \
     --enable-zlib \
+    --enable-sm \
     --with-xsl-stylesheetsdir="$_sheetdir"
   make
 }