using pkg-config is enough.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@40572 20353a03-c40f-0410-a6d1-a30d3c3de9de

buildout/software-profiles/libxslt.cfg

@@ -13,5 +13,4 @@ recipe = hexagonit.recipe.cmmi
 configure-options =
   --with-libxml-prefix=${libxml2:location}
 environment =
-    CFLAGS =-I${zlib:location}/include
-    LDFLAGS =-Wl,-rpath -Wl,${libxml2:location}/lib -L${zlib:location}/lib -Wl,-rpath -Wl,${zlib:location}/lib
+  PKG_CONFIG_PATH=${libxml2:location}/lib/pkgconfig