def preferred_ml_updates(d): 
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    # If any of PREFERRED_PROVIDER, PREFERRED_RPROVIDER, REQUIRED_VERSION 
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    # or PREFERRED_VERSION are set, we need to mirror these variables in 
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    # the multilib case; 
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    multilibs = d.getVar('MULTILIBS') or "" 
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    if not multilibs: 
 | 
        return 
 | 
  
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    prefixes = [] 
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    for ext in multilibs.split(): 
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        eext = ext.split(':') 
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        if len(eext) > 1 and eext[0] == 'multilib': 
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            prefixes.append(eext[1]) 
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 | 
    required_versions = [] 
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    preferred_versions = [] 
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    providers = [] 
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    rproviders = [] 
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    for v in d.keys(): 
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        if v.startswith("REQUIRED_VERSION_"): 
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            required_versions.append(v) 
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        if v.startswith("PREFERRED_VERSION_"): 
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            preferred_versions.append(v) 
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        if v.startswith("PREFERRED_PROVIDER_"): 
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            providers.append(v) 
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        if v.startswith("PREFERRED_RPROVIDER_"): 
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            rproviders.append(v) 
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    def sort_versions(versions, keyword): 
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        version_str = "_".join([keyword, "VERSION", ""]) 
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        for v in versions: 
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            val = d.getVar(v, False) 
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            pkg = v.replace(version_str, "") 
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            if pkg.endswith("-native") or "-crosssdk-" in pkg or pkg.startswith(("nativesdk-", "virtual/nativesdk-")): 
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                continue 
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            if '-cross-' in pkg and '${' in pkg: 
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                for p in prefixes: 
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                    localdata = bb.data.createCopy(d) 
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                    override = ":virtclass-multilib-" + p 
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                    localdata.setVar("OVERRIDES", localdata.getVar("OVERRIDES", False) + override) 
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                    if "-canadian-" in pkg: 
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                        newname = localdata.expand(v) 
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                    else: 
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                        newname = localdata.expand(v).replace(version_str, version_str + p + '-') 
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                    if newname != v: 
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                        newval = localdata.expand(val) 
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                        d.setVar(newname, newval) 
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                # Avoid future variable key expansion 
 | 
                vexp = d.expand(v) 
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                if v != vexp and d.getVar(v, False): 
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                    d.renameVar(v, vexp) 
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                continue 
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            for p in prefixes: 
 | 
                newname = version_str + p + "-" + pkg 
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                if not d.getVar(newname, False): 
 | 
                    d.setVar(newname, val) 
 | 
  
 | 
    sort_versions(required_versions, "REQUIRED") 
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    sort_versions(preferred_versions, "PREFERRED") 
 | 
  
 | 
    for prov in providers: 
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        val = d.getVar(prov, False) 
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        pkg = prov.replace("PREFERRED_PROVIDER_", "") 
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        if pkg.endswith("-native") or "-crosssdk-" in pkg or pkg.startswith(("nativesdk-", "virtual/nativesdk-")): 
 | 
            continue 
 | 
        if 'cross-canadian' in pkg: 
 | 
            for p in prefixes: 
 | 
                localdata = bb.data.createCopy(d) 
 | 
                override = ":virtclass-multilib-" + p 
 | 
                localdata.setVar("OVERRIDES", localdata.getVar("OVERRIDES", False) + override) 
 | 
                newname = localdata.expand(prov) 
 | 
                if newname != prov: 
 | 
                    newval = localdata.expand(val) 
 | 
                    d.setVar(newname, newval) 
 | 
            # Avoid future variable key expansion 
 | 
            provexp = d.expand(prov) 
 | 
            if prov != provexp and d.getVar(prov, False): 
 | 
                d.renameVar(prov, provexp) 
 | 
            continue 
 | 
        virt = "" 
 | 
        if pkg.startswith("virtual/"): 
 | 
            pkg = pkg.replace("virtual/", "") 
 | 
            virt = "virtual/" 
 | 
        for p in prefixes: 
 | 
            newval = None 
 | 
            if pkg != "kernel": 
 | 
                newval = p + "-" + val 
 | 
  
 | 
            # implement variable keys 
 | 
            localdata = bb.data.createCopy(d) 
 | 
            override = ":virtclass-multilib-" + p 
 | 
            localdata.setVar("OVERRIDES", localdata.getVar("OVERRIDES", False) + override) 
 | 
            newname = localdata.expand(prov) 
 | 
            if newname != prov and not d.getVar(newname, False): 
 | 
                d.setVar(newname, localdata.expand(newval)) 
 | 
  
 | 
            # implement alternative multilib name 
 | 
            newname = localdata.expand("PREFERRED_PROVIDER_" + virt + p + "-" + pkg) 
 | 
            if not d.getVar(newname, False) and newval != None: 
 | 
                d.setVar(newname, localdata.expand(newval)) 
 | 
        # Avoid future variable key expansion 
 | 
        provexp = d.expand(prov) 
 | 
        if prov != provexp and d.getVar(prov, False): 
 | 
            d.renameVar(prov, provexp) 
 | 
  
 | 
    for prov in rproviders: 
 | 
        val = d.getVar(prov, False) 
 | 
        pkg = prov.replace("PREFERRED_RPROVIDER_", "") 
 | 
        for p in prefixes: 
 | 
            newval = p + "-" + val 
 | 
  
 | 
            # implement variable keys 
 | 
            localdata = bb.data.createCopy(d) 
 | 
            override = ":virtclass-multilib-" + p 
 | 
            localdata.setVar("OVERRIDES", localdata.getVar("OVERRIDES", False) + override) 
 | 
            newname = localdata.expand(prov) 
 | 
            if newname != prov and not d.getVar(newname, False): 
 | 
                d.setVar(newname, localdata.expand(newval)) 
 | 
  
 | 
            # implement alternative multilib name 
 | 
            newname = localdata.expand("PREFERRED_RPROVIDER_" + p + "-" + pkg) 
 | 
            if not d.getVar(newname, False) and newval != None: 
 | 
                d.setVar(newname, localdata.expand(newval)) 
 | 
        # Avoid future variable key expansion 
 | 
        provexp = d.expand(prov) 
 | 
        if prov != provexp and d.getVar(prov, False): 
 | 
            d.renameVar(prov, provexp) 
 | 
  
 | 
    def translate_provide(prefix, prov): 
 | 
        # Really need to know if kernel modules class is inherited somehow 
 | 
        if prov == "lttng-modules": 
 | 
            return prov 
 | 
        if not prov.startswith("virtual/"): 
 | 
            return prefix + "-" + prov 
 | 
        if prov == "virtual/kernel": 
 | 
            return prov 
 | 
        prov = prov.replace("virtual/", "") 
 | 
        return "virtual/" + prefix + "-" + prov 
 | 
  
 | 
    mp = (d.getVar("MULTI_PROVIDER_WHITELIST") or "").split() 
 | 
    extramp = [] 
 | 
    for p in mp: 
 | 
        if p.endswith("-native") or "-crosssdk-" in p or p.startswith(("nativesdk-", "virtual/nativesdk-")) or 'cross-canadian' in p: 
 | 
            continue 
 | 
        for pref in prefixes: 
 | 
            extramp.append(translate_provide(pref, p)) 
 | 
    d.setVar("MULTI_PROVIDER_WHITELIST", " ".join(mp + extramp)) 
 | 
  
 | 
    abisafe = (d.getVar("SIGGEN_EXCLUDERECIPES_ABISAFE") or "").split() 
 | 
    extras = [] 
 | 
    for p in prefixes: 
 | 
        for a in abisafe: 
 | 
            extras.append(p + "-" + a) 
 | 
    d.appendVar("SIGGEN_EXCLUDERECIPES_ABISAFE", " " + " ".join(extras)) 
 | 
  
 | 
    siggen_exclude = (d.getVar("SIGGEN_EXCLUDE_SAFE_RECIPE_DEPS") or "").split() 
 | 
    extras = [] 
 | 
    for p in prefixes: 
 | 
        for a in siggen_exclude: 
 | 
            a1, a2 = a.split("->") 
 | 
            extras.append(translate_provide(p, a1) + "->" + translate_provide(p, a2)) 
 | 
    d.appendVar("SIGGEN_EXCLUDE_SAFE_RECIPE_DEPS", " " + " ".join(extras)) 
 | 
  
 | 
python multilib_virtclass_handler_vendor () { 
 | 
    if isinstance(e, bb.event.ConfigParsed): 
 | 
        for v in e.data.getVar("MULTILIB_VARIANTS").split(): 
 | 
            if e.data.getVar("TARGET_VENDOR:virtclass-multilib-" + v, False) is None: 
 | 
                e.data.setVar("TARGET_VENDOR:virtclass-multilib-" + v, e.data.getVar("TARGET_VENDOR", False) + "ml" + v) 
 | 
        preferred_ml_updates(e.data) 
 | 
} 
 | 
addhandler multilib_virtclass_handler_vendor 
 | 
multilib_virtclass_handler_vendor[eventmask] = "bb.event.ConfigParsed" 
 | 
  
 | 
python multilib_virtclass_handler_global () { 
 | 
    variant = e.data.getVar("BBEXTENDVARIANT") 
 | 
    if variant: 
 | 
        return 
 | 
  
 | 
    non_ml_recipes = d.getVar('NON_MULTILIB_RECIPES').split() 
 | 
  
 | 
    if bb.data.inherits_class('kernel', e.data) or \ 
 | 
            bb.data.inherits_class('module-base', e.data) or \ 
 | 
            d.getVar('BPN') in non_ml_recipes: 
 | 
  
 | 
            # We need to avoid expanding KERNEL_VERSION which we can do by deleting it 
 | 
            # from a copy of the datastore 
 | 
            localdata = bb.data.createCopy(d) 
 | 
            localdata.delVar("KERNEL_VERSION") 
 | 
  
 | 
            variants = (e.data.getVar("MULTILIB_VARIANTS") or "").split() 
 | 
  
 | 
            import oe.classextend 
 | 
            clsextends = [] 
 | 
            for variant in variants: 
 | 
                clsextends.append(oe.classextend.ClassExtender(variant, localdata)) 
 | 
  
 | 
            # Process PROVIDES 
 | 
            origprovs = provs = localdata.getVar("PROVIDES") or "" 
 | 
            for clsextend in clsextends: 
 | 
                provs = provs + " " + clsextend.map_variable("PROVIDES", setvar=False) 
 | 
            e.data.setVar("PROVIDES", provs) 
 | 
  
 | 
            # Process RPROVIDES 
 | 
            origrprovs = rprovs = localdata.getVar("RPROVIDES") or "" 
 | 
            for clsextend in clsextends: 
 | 
                rprovs = rprovs + " " + clsextend.map_variable("RPROVIDES", setvar=False) 
 | 
            if rprovs.strip(): 
 | 
                e.data.setVar("RPROVIDES", rprovs) 
 | 
  
 | 
            # Process RPROVIDES:${PN}... 
 | 
            for pkg in (e.data.getVar("PACKAGES") or "").split(): 
 | 
                origrprovs = rprovs = localdata.getVar("RPROVIDES:%s" % pkg) or "" 
 | 
                for clsextend in clsextends: 
 | 
                    rprovs = rprovs + " " + clsextend.map_variable("RPROVIDES:%s" % pkg, setvar=False) 
 | 
                    rprovs = rprovs + " " + clsextend.extname + "-" + pkg 
 | 
                e.data.setVar("RPROVIDES:%s" % pkg, rprovs) 
 | 
} 
 | 
  
 | 
addhandler multilib_virtclass_handler_global 
 | 
multilib_virtclass_handler_global[eventmask] = "bb.event.RecipeTaskPreProcess" 
 |