Remote test execution for cross compiled tests. Run it like:

$ ./gradlew backend.native:tests:run \
    -Premote=user@111.22.33.444 -Ptest_target=raspberrypi

The new gradle command line options:

    -Pbuild_flags  renamed -Pkonanc_flags.
    -Ptest_flags   provides compiler flags to the test builds.
    -Ptest_target  properly sets up compiler as well as interop
                   to cross compile tests.
    -Premote       specifies remote host and login.

backend.native/tests/build.gradle

@@ -29,6 +29,8 @@ ext.testOutputRoot = rootProject.file("test.output").absolutePath
 ext.externalTestsDir = project.file("external")
 externalTestsDir.mkdirs()
 
+project.convention.plugins.remoteExec = new org.jetbrains.kotlin.ExecRemote(project)
+
 allprojects {
     // Root directories for test output (logs, compiled files, statistics etc). Only single path must be in each set.
     sourceSets {
@@ -1604,6 +1606,12 @@ task interop2(type: RunInteropKonanTest) {
 }
 
 task interop3(type: RunInteropKonanTest) {
+    // We disable this test on Raspberry Pi because
+    // qsort accepts size_t args. So the .kt file
+    // should be different depending on the bitness of the target.
+    // There are plans to provide a solution and turn this
+    // test back on.
+    disabled = (project.testTarget == 'raspberrypi')
     goldValue = "8 9 12 13 14 \n"
     source = "interop/basics/3.kt"
     interop = 'cstdlib'

backend.native/tests/interop/basics/3.kt

@@ -26,4 +26,4 @@ private fun comparator(a: COpaquePointer?, b: COpaquePointer?): Int {
     val bValue = b!!.reinterpret<CInt32Var>().pointed.value
 
     return (aValue - bValue)
-}
+}