external-toolchain-cross-canadian: ship TARGET_PREFIX symlinks

When EXTERNAL_TARGET_SYS != TARGET_PREFIX, which is generally the case,
we should ship symlinks with the other prefix. This is largely for
compatibility with existing scripts, but also means we don't need to
alter the variables in environment-setup, i.e. CC.

Signed-off-by: Christopher Larson <chris_larson@mentor.com>

classes/external-toolchain-cross-canadian.bbclass

@@ -22,3 +22,27 @@ libexecdir = "${exec_prefix}/libexec"
 
 # We're relying on a compatible host libc, not one from a nativesdk build
 INSANE_SKIP_${PN} += "build-deps file-rdeps"
+
+do_install_append () {
+    for i in ${D}${bindir}/${EXTERNAL_TARGET_SYS}-*; do
+        if [ -e "$i" ]; then
+            j="$(basename "$i")"
+            ln -sv "$j" "${D}${bindir}/${TARGET_PREFIX}${j#${EXTERNAL_TARGET_SYS}-}"
+        fi
+    done
+}
+
+python add_files_links () {
+    prefix = d.getVar('EXTERNAL_TARGET_SYS') + '-'
+    full_prefix = os.path.join(d.getVar('bindir'), prefix)
+    new_prefix = d.getVar('TARGET_PREFIX')
+    for pkg in d.getVar('PACKAGES').split():
+        files = (d.getVar('FILES_%s' % pkg) or '').split()
+        new_files = []
+        for f in files:
+            if f.startswith(full_prefix):
+                new_files.append(f.replace(prefix, new_prefix))
+        if new_files:
+            d.appendVar('FILES_%s' % pkg, ' ' + ' '.join(new_files))
+}
+do_package[prefuncs] += "add_files_links"