multilib: Add support for compiling recipes against multiple ABIs

This patch adds the core multilib class which can be used along with a
parameter specifying the mutlilib to use in BBCLASSEXTEND.

The MLPREFIX variable is added and can be used in cases where its too
difficult to dynmaically work out where a mutltilib prefix is needed
to be added to a variable.

This includes:
  * SHLIBSDIR and PACKAGE_ARCH fixes from Lianhao Lu.
  * PACKAGE_DYNAMIC mapping from Yu Ke
  * PACKAGE_INSTALL mapping from Yu Ke
  * RPROVIDES mapping from Yu Ke
  * TARGET_VENDOR fix from Mark Hatle
  * Ignorning *-native-runtime dependnecies as well as *-native from Yu Ke
  * Map PKG and ALLOW_EMPTY from Dongxiao Xu
  * Ensure RCONFLICTS and PKG field dependencies are remapped (from Dongxiao Xu)
  * Ensure PN and MLPREFIX are set at the same time to ensure consistent BPN values (Yu Ke)

Signed-off-by: Yu Ke <ke.yu@intel.com>
Signed-off-by: Xu Dongxiao <dongxiao.xu@intel.com>
Signed-off-by: Lianhao Lu <lianhao.lu@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 89 insertions, 0 deletions

diff --git a/meta/classes/multilib.bbclass b/meta/classes/multilib.bbclass
new file mode 100644
index 0000000000..6e1669fb7f
--- /dev/null
+++ b/meta/classes/multilib.bbclass
@@ -0,0 +1,89 @@
+python multilib_virtclass_handler () {
+    if not isinstance(e, bb.event.RecipePreFinalise):
+        return
+
+    cls = e.data.getVar("BBEXTENDCURR", True)
+    variant = e.data.getVar("BBEXTENDVARIANT", True)
+    if cls != "multilib" or not variant:
+        return
+ 
+    override = ":virtclass-multilib-" + variant
+
+    e.data.setVar("MLPREFIX", variant + "-")
+    e.data.setVar("PN", variant + "-" + e.data.getVar("PN", False))
+    e.data.setVar("SHLIBSDIR_virtclass-multilib-" + variant ,e.data.getVar("SHLIBSDIR", False) + "/" + variant)
+    e.data.setVar("TARGET_VENDOR_virtclass-multilib-" + variant, e.data.getVar("TARGET_VENDOR", False) + "ml" + variant)
+    e.data.setVar("OVERRIDES", e.data.getVar("OVERRIDES", False) + override)
+}
+
+addhandler multilib_virtclass_handler
+
+STAGINGCC_prepend = "${BBEXTENDVARIANT}-"
+
+python __anonymous () {
+    variant = d.getVar("BBEXTENDVARIANT", True)
+
+    def extend_name(name):
+        if name.startswith("virtual/"):
+            subs = name.split("/", 1)[1]
+            if not subs.startswith(variant):
+                return "virtual/" + variant + "-" + subs
+            return name
+        if not name.startswith(variant):
+            return variant + "-" + name
+        return name
+
+    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(("-native", "-native-runtime")):
+                newdeps.append(dep)
+            else:
+                newdeps.append(extend_name(dep))
+        d.setVar(varname, " ".join(newdeps))
+
+    def map_variable(varname, d):
+        var = d.getVar(varname, True)
+        if not var:
+            return
+        var = var.split()
+        newvar = []
+        for v in var:
+            newvar.append(extend_name(v))
+        d.setVar(varname, " ".join(newvar))
+
+    pkgs = []
+    pkgrename = {}
+    for pkg in (d.getVar("PACKAGES", True) or "").split():
+        if pkg.startswith(variant):
+            pkgs.append(pkg)
+            continue
+        pkgrename[pkg] = extend_name(pkg)
+        pkgs.append(pkgrename[pkg])
+
+    if pkgrename:
+        d.setVar("PACKAGES", " ".join(pkgs))
+        for pkg in pkgrename:
+            for subs in ["FILES", "RDEPENDS", "RRECOMMENDS", "SUMMARY", "DESCRIPTION", "RSUGGESTS", "RPROVIDES", "RCONFLICTS", "PKG", "ALLOW_EMPTY"]:
+                d.renameVar("%s_%s" % (subs, pkg), "%s_%s" % (subs, pkgrename[pkg]))
+
+    map_dependencies("DEPENDS", d)
+    for pkg in (d.getVar("PACKAGES", True).split() + [""]):
+        map_dependencies("RDEPENDS", d, pkg)
+        map_dependencies("RRECOMMENDS", d, pkg)
+        map_dependencies("RSUGGESTS", d, pkg)
+        map_dependencies("RPROVIDES", d, pkg)
+        map_dependencies("RREPLACES", d, pkg)
+        map_dependencies("RCONFLICTS", d, pkg)
+        map_dependencies("PKG", d, pkg)
+
+    map_variable("PROVIDES", d)
+    map_variable("PACKAGES_DYNAMIC", d)
+    map_variable("PACKAGE_INSTALL", d)
+}