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/build.gradle

@@ -204,7 +204,7 @@ targetList.each { target ->
         project(':runtime').file('src/main/kotlin'), 
         project(':Interop:Runtime').file('src/main/kotlin'),
         project(':Interop:Runtime').file('src/native/kotlin'),
-        *project.globalArgs)
+        *project.globalBuildArgs)
 
         inputs.dir(project(':runtime').file('src/main/kotlin'))
         inputs.dir(project(':Interop:Runtime').file('src/main/kotlin'))
@@ -230,7 +230,7 @@ targetList.each { target ->
             '-runtime', project(':runtime').file("build/${target}/runtime.bc"),
             '-properties', project(':backend.native').file('konan.properties'),
         project(':runtime').file('src/launcher/kotlin'), 
-        *project.globalArgs)
+        *project.globalBuildArgs)
 
         inputs.dir(project(':runtime').file('src/launcher/kotlin'))
         outputs.file(project(':runtime').file("build/${target}/start.kt.bc"))

backend.native/konan.properties

@@ -65,8 +65,11 @@ targetSysRoot.linux-raspberrypi = target-sysroot-1-raspberrypi
 llvmHome.linux-raspberrypi = clang+llvm-3.9.0-linux-x86-64
 libGcc.linux-raspberrypi = target-sysroot-1-raspberrypi/lib/gcc/arm-linux-gnueabihf/4.8.3/
 gccToolChain.linux-raspberrypi = target-gcc-toolchain-3-linux-x86-64
-llvmLlcFlags.linux-raspberrypi = -mtriple=armv7-unknown-linux-gnueabihf --disable-fp-elim -mfloat-abi=hard
+llvmLtoFlags.linux-raspberrypi = -O3 -function-sections -exported-symbol=Konan_main
+llvmLlcFlags.linux-raspberrypi = -mtriple=armv7-unknown-linux-gnueabihf --disable-fp-elim -float-abi=hard
 linkerKonanFlags.linux-raspberrypi = -Bstatic -lstdc++ -Bdynamic -ldl -lm -lc -lpthread -fuse-ld=gold
+entrySelector.linux-raspberrypi = --defsym main=Konan_main
 dependencies.raspberrypi = clang+llvm-3.9.0-linux-x86-64 \
   target-gcc-toolchain-3-linux-x86-64 \
   target-sysroot-1-raspberrypi
+

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)
-}
+}