diff --git a/yocto-poky/meta/classes/uninative.bbclass b/yocto-poky/meta/classes/uninative.bbclass
index 0cd27db..89cec07 100644
--- a/yocto-poky/meta/classes/uninative.bbclass
+++ b/yocto-poky/meta/classes/uninative.bbclass
@@ -1,20 +1,107 @@
-NATIVELSBSTRING = "universal"
+UNINATIVE_LOADER ?= "${STAGING_DIR}-uninative/${BUILD_ARCH}-linux/lib/${@bb.utils.contains('BUILD_ARCH', 'x86_64', 'ld-linux-x86-64.so.2', 'ld-linux.so.2', d)}"
 
-UNINATIVE_LOADER ?= "${@bb.utils.contains('BUILD_ARCH', 'x86_64', '${STAGING_DIR_NATIVE}/lib/ld-linux-x86-64.so.2', '${STAGING_DIR_NATIVE}/lib/ld-linux.so.2', d)}"
+UNINATIVE_URL ?= "unset"
+UNINATIVE_TARBALL ?= "${BUILD_ARCH}-nativesdk-libc.tar.bz2"
+# Example checksums
+#UNINATIVE_CHECKSUM[i586] = "dead"
+#UNINATIVE_CHECKSUM[x86_64] = "dead"
+UNINATIVE_DLDIR ?= "${DL_DIR}/uninative/"
 
-addhandler uninative_eventhandler
-uninative_eventhandler[eventmask] = "bb.event.BuildStarted"
+# https://wiki.debian.org/GCC5
+# We may see binaries built with gcc5 run or linked into gcc4 environment
+# so use the older libstdc++ standard for now until we don't support gcc4
+# on the host system.
+BUILD_CXXFLAGS_append = " -D_GLIBCXX_USE_CXX11_ABI=0"
 
-python uninative_eventhandler() {
-    loader = e.data.getVar("UNINATIVE_LOADER", True)
-    if not os.path.exists(loader):
-        import subprocess
-        cmd = e.data.expand("mkdir -p ${STAGING_DIR}; cd ${STAGING_DIR}; tar -xjf ${COREBASE}/${BUILD_ARCH}-nativesdk-libc.tar.bz2; ${STAGING_DIR}/relocate_sdk.py ${STAGING_DIR_NATIVE} ${UNINATIVE_LOADER} ${UNINATIVE_LOADER} ${STAGING_BINDIR_NATIVE}/patchelf-uninative")
-        #bb.warn("nativesdk lib extraction: " + cmd)
+#
+# icu configure defaults to CXX11 if no -std= option is passed in CXXFLAGS
+# therefore pass one
+BUILD_CXXFLAGS_append_pn-icu-native = " -std=c++98"
+
+addhandler uninative_event_fetchloader
+uninative_event_fetchloader[eventmask] = "bb.event.BuildStarted"
+
+addhandler uninative_event_enable
+uninative_event_enable[eventmask] = "bb.event.ConfigParsed"
+
+python uninative_event_fetchloader() {
+    """
+    This event fires on the parent and will try to fetch the tarball if the
+    loader isn't already present.
+    """
+
+    chksum = d.getVarFlag("UNINATIVE_CHECKSUM", d.getVar("BUILD_ARCH", True), True)
+    if not chksum:
+        bb.fatal("Uninative selected but not configured correctly, please set UNINATIVE_CHECKSUM[%s]" % d.getVar("BUILD_ARCH", True))
+
+    loader = d.getVar("UNINATIVE_LOADER", True)
+    loaderchksum = loader + ".chksum"
+    if os.path.exists(loader) and os.path.exists(loaderchksum):
+        with open(loaderchksum, "r") as f:
+            readchksum = f.read().strip()
+        if readchksum == chksum:
+            return
+
+    import subprocess
+    try:
+        # Save and restore cwd as Fetch.download() does a chdir()
+        olddir = os.getcwd()
+
+        tarball = d.getVar("UNINATIVE_TARBALL", True)
+        tarballdir = os.path.join(d.getVar("UNINATIVE_DLDIR", True), chksum)
+        tarballpath = os.path.join(tarballdir, tarball)
+
+        if not os.path.exists(tarballpath):
+            bb.utils.mkdirhier(tarballdir)
+            if d.getVar("UNINATIVE_URL", True) == "unset":
+                bb.fatal("Uninative selected but not configured, please set UNINATIVE_URL")
+
+            localdata = bb.data.createCopy(d)
+            localdata.setVar('FILESPATH', "")
+            localdata.setVar('DL_DIR', tarballdir)
+
+            srcuri = d.expand("${UNINATIVE_URL}${UNINATIVE_TARBALL};sha256sum=%s" % chksum)
+            bb.note("Fetching uninative binary shim from %s" % srcuri)
+
+            fetcher = bb.fetch2.Fetch([srcuri], localdata, cache=False)
+            fetcher.download()
+            localpath = fetcher.localpath(srcuri)
+            if localpath != tarballpath and os.path.exists(localpath) and not os.path.exists(tarballpath):
+                    os.symlink(localpath, tarballpath)
+
+        cmd = d.expand("mkdir -p ${STAGING_DIR}-uninative; cd ${STAGING_DIR}-uninative; tar -xjf ${UNINATIVE_DLDIR}/%s/${UNINATIVE_TARBALL}; ${STAGING_DIR}-uninative/relocate_sdk.py ${STAGING_DIR}-uninative/${BUILD_ARCH}-linux ${UNINATIVE_LOADER} ${UNINATIVE_LOADER} ${STAGING_DIR}-uninative/${BUILD_ARCH}-linux/${bindir_native}/patchelf-uninative ${STAGING_DIR}-uninative/${BUILD_ARCH}-linux${base_libdir_native}/libc*.so" % chksum)
         subprocess.check_call(cmd, shell=True)
+
+        with open(loaderchksum, "w") as f:
+            f.write(chksum)
+
+        enable_uninative(d)
+
+    except bb.fetch2.BBFetchException as exc:
+        bb.warn("Disabling uninative as unable to fetch uninative tarball: %s" % str(exc))
+        bb.warn("To build your own uninative loader, please bitbake uninative-tarball and set UNINATIVE_TARBALL appropriately.")
+    except subprocess.CalledProcessError as exc:
+        bb.warn("Disabling uninative as unable to install uninative tarball: %s" % str(exc))
+        bb.warn("To build your own uninative loader, please bitbake uninative-tarball and set UNINATIVE_TARBALL appropriately.")
+    finally:
+        os.chdir(olddir)
 }
 
-SSTATEPOSTUNPACKFUNCS_append = " uninative_changeinterp"
+python uninative_event_enable() {
+    """
+    This event handler is called in the workers and is responsible for setting
+    up uninative if a loader is found.
+    """
+    enable_uninative(d)
+}
+
+def enable_uninative(d):
+    loader = d.getVar("UNINATIVE_LOADER", True)
+    if os.path.exists(loader):
+        bb.debug(2, "Enabling uninative")
+        d.setVar("NATIVELSBSTRING", "universal")
+        d.appendVar("SSTATEPOSTUNPACKFUNCS", " uninative_changeinterp")
+        d.prependVar("PATH", "${STAGING_DIR}-uninative/${BUILD_ARCH}-linux${bindir_native}:")
 
 python uninative_changeinterp () {
     import subprocess
@@ -27,6 +114,8 @@
     sstateinst = d.getVar('SSTATE_INSTDIR', True)
     for walkroot, dirs, files in os.walk(sstateinst):
         for file in files:
+            if file.endswith(".so") or ".so." in file:
+                continue
             f = os.path.join(walkroot, file)
             if os.path.islink(f):
                 continue
@@ -36,9 +125,16 @@
             elf = oe.qa.ELFFile(f)
             try:
                 elf.open()
-            except:
+            except oe.qa.NotELFFileError:
+                continue
+            if not elf.isDynamic():
                 continue
 
-            #bb.warn("patchelf-uninative --set-interpreter %s %s" % (d.getVar("UNINATIVE_LOADER", True), f))
-            subprocess.call("patchelf-uninative --set-interpreter %s %s" % (d.getVar("UNINATIVE_LOADER", True), f), shell=True)
+            try:
+                subprocess.check_output(("patchelf-uninative", "--set-interpreter",
+                                         d.getVar("UNINATIVE_LOADER", True), f),
+                                        stderr=subprocess.STDOUT)
+            except subprocess.CalledProcessError as e:
+                bb.fatal("'%s' failed with exit code %d and the following output:\n%s" %
+                         (e.cmd, e.returncode, e.output))
 }