[OE-core] [PATCH 1/3] cross.bbclass: add virtclass handler

[Otavio Salvador]

Allow use of BBCLASSEXTEND with 'cross' and use of virtclass-cross in
recipes.

Signed-off-by: Otavio Salvador <otavio at ossystems.com.br>
---
 meta/classes/cross.bbclass |   50 ++++++++++++++++++++++++++++++++++++++++++++
 1 files changed, 50 insertions(+), 0 deletions(-)

diff --git a/meta/classes/cross.bbclass b/meta/classes/cross.bbclass
index 5681ab9..a3b8e10 100644
--- a/meta/classes/cross.bbclass
+++ b/meta/classes/cross.bbclass
@@ -55,6 +55,56 @@ libexecdir = "${exec_prefix}/libexec/${CROSS_TARGET_SYS_DIR}"
 
 do_populate_sysroot[sstate-inputdirs] = "${SYSROOT_DESTDIR}/${STAGING_DIR_NATIVE}"
 
+python cross_virtclass_handler () {
+    if not isinstance(e, bb.event.RecipePreFinalise):
+        return
+
+    classextend = e.data.getVar('BBCLASSEXTEND', True) or ""
+    if "cross" not in classextend:
+        return
+
+    pn = e.data.getVar("PN", True)
+    if not pn.endswith("-cross"):
+        return
+
+    def map_dependencies(varname, d, suffix = ""):
+        if suffix:
+            varname = varname + "_" + suffix
+        deps = d.getVar(varname, True)
+        if not deps:
+            return
+        deps = bb.utils.explode_deps(deps)
+        newdeps = []
+        for dep in deps:
+            if dep.endswith("-cross"):
+                newdeps.append(dep.replace("-cross", "-cross"))
+            elif not dep.endswith("-cross"):
+                newdeps.append(dep + "-cross")
+            else:
+                newdeps.append(dep)
+        bb.data.setVar(varname, " ".join(newdeps), d)
+
+    map_dependencies("DEPENDS", e.data)
+    for pkg in (e.data.getVar("PACKAGES", True).split() + [""]):
+        map_dependencies("RDEPENDS", e.data, pkg)
+        map_dependencies("RRECOMMENDS", e.data, pkg)
+        map_dependencies("RSUGGESTS", e.data, pkg)
+        map_dependencies("RPROVIDES", e.data, pkg)
+        map_dependencies("RREPLACES", e.data, pkg)
+
+    provides = e.data.getVar("PROVIDES", True)
+    for prov in provides.split():
+        if prov.find(pn) != -1:
+            continue
+        if not prov.endswith("-cross"):
+            provides = provides.replace(prov, prov + "-cross")
+    e.data.setVar("PROVIDES", provides)
+
+    bb.data.setVar("OVERRIDES", e.data.getVar("OVERRIDES", False) + ":virtclass-cross", e.data)
+}
+
+addhandler cross_virtclass_handler
+
 do_install () {
 	oe_runmake 'DESTDIR=${D}' install
 }
-- 
1.7.2.5