NativeToolChainInternal toolChain = toolChainFor(nativeBinarySpec, toolChains);
        PlatformToolProvider toolProvider = toolChain.select((NativePlatformInternal) nativeBinarySpec.getTargetPlatform());
        nativeBinary.setToolChain(toolChain);
        nativeBinary.setPlatformToolProvider(toolProvider);
    }

    private static void assignToolsToNativeBinaryExtension(NativeBinarySpecInternal nativeBinary, File buildDir) {

                testBinary.setResolver(resolver);
                testBinary.setToolChain(testedBinary.getToolChain());
                NativeExecutableFileSpec executable = testBinary.getExecutable();
                NativeInstallationSpec installation = testBinary.getInstallation();
                executable.setToolChain(testedBinary.getToolChain());
                executable.setFile(executableFileFor(testBinary, buildDir));

     */
    public NativeToolChain getToolChain() {
        return toolChain;
    }

    /**
     * Sets the Tool Chain that produces the native executable.
     * @since 4.7
     */
    public void setToolChain(NativeToolChain toolChain) {
        this.toolChain = toolChain;
    }

import java.io.File;
import java.util.Collection;
import java.util.Map;

public interface NativeBinarySpecInternal extends NativeBinarySpec, BinarySpecInternal {

    void setFlavor(Flavor flavor);

    void setToolChain(NativeToolChain toolChain);

    void setTargetPlatform(NativePlatform targetPlatform);

    void setBuildType(BuildType buildType);

    Tool getToolByName(String name);

    }

    @Override
    public void setTestedBinary(NativeBinarySpecInternal testedBinary) {
        this.testedBinary = testedBinary;
        setTargetPlatform(testedBinary.getTargetPlatform());
        setToolChain(testedBinary.getToolChain());
        setPlatformToolProvider(testedBinary.getPlatformToolProvider());
        setBuildType(testedBinary.getBuildType());
        setFlavor(testedBinary.getFlavor());
    }

        protected void before(IMethodInvocation invocation) {
            System.out.println(String.format("Using tool chain %s", toolChain.getDisplayName()));
            AbstractInstalledToolChainIntegrationSpec.setToolChain((AvailableToolChains.InstalledToolChain) toolChain);
        }
    }

        this.flavor = flavor;
    }

    @Override
    public NativeToolChain getToolChain() {
        return toolChain;
    }

    @Override
    public void setToolChain(NativeToolChain toolChain) {
        this.toolChain = toolChain;
    }

    @Override
    public NativePlatform getTargetPlatform() {
        return targetPlatform;
    }

    @Override

 * `getTargetPlatform()` was changed to return a `Property`.
 * `setTargetPlatform(NativePlatform)` was removed. Use `Property.set()` instead.
 * `getToolChain()` was changed to return a `Property`.
 * `setToolChain(NativeToolChain)` was removed. Use `Property.set()` instead.

link:{groovyDslPath}/org.gradle.nativeplatform.tasks.CreateStaticLibrary.html[CreateStaticLibrary]::
 * `getOutputFile()` was changed to return a `Property`.