[PATCH] multilib/clsextend: Improve handling of regexps in PACKAGES_DYNAMIC

[Richard Purdie <richard.purdie@linuxfoundation.org>]

Now that PACKAGES_DYNAMIC is more standardised, starting with ^ anchors,
the variable manipulations performed by clsextend for multilib don't work.

This patch at least improves it to hack around the problem and enable
mulitlib builds to work again. If this code doesn't do the right thing, the
recipe is free to override the variable with the correct multilib case.

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
---
diff --git a/meta/classes/multilib.bbclass b/meta/classes/multilib.bbclass
index eaaad5f..3824f3b 100644
--- a/meta/classes/multilib.bbclass
+++ b/meta/classes/multilib.bbclass
@@ -75,7 +75,7 @@ python __anonymous () {
     clsextend.map_depends_variable("DEPENDS")
     clsextend.map_packagevars()
     clsextend.map_variable("PROVIDES")
-    clsextend.map_variable("PACKAGES_DYNAMIC")
+    clsextend.map_regexp_variable("PACKAGES_DYNAMIC")
     clsextend.map_variable("PACKAGE_INSTALL")
     clsextend.map_variable("INITSCRIPT_PACKAGES")
 }
diff --git a/meta/lib/oe/classextend.py b/meta/lib/oe/classextend.py
index 86b1e8a..857a6c9 100644
--- a/meta/lib/oe/classextend.py
+++ b/meta/lib/oe/classextend.py
@@ -33,6 +33,22 @@ class ClassExtender(object):
             self.d.setVar(varname, newdata)
         return newdata
 
+    def map_regexp_variable(self, varname, setvar = True):
+        var = self.d.getVar(varname, True)
+        if not var:
+            return ""
+        var = var.split()
+        newvar = []
+        for v in var:
+            if v.startswith("^"):
+                newvar.append("^" + self.extname + "-" + v[1:])
+            else:
+                newvar.append(self.extend_name(v))
+        newdata =  " ".join(newvar)
+        if setvar:
+            self.d.setVar(varname, newdata)
+        return newdata
+
     def map_depends(self, dep):
         if dep.endswith(("-native", "-native-runtime")):
             return dep