broke jvm

build.gradle.kts

@@ -1,3 +1,5 @@
+import org.gradle.internal.jvm.Jvm
+
 plugins {
     kotlin("jvm") version "2.3.0"
 }
@@ -37,4 +39,35 @@ tasks.register<JavaExec>("runClient") {
     classpath = sourceSets["main"].runtimeClasspath
     mainClass.set("su.sonoma.MainKt")
     args = listOf("client")
+    jvmArgs = listOf(
+        "--add-opens=java.base/java.io=ALL-UNNAMED"
+    )
+    dependsOn("buildTunLib")
+}
+
+val javaHome = Jvm.current().javaHome.absolutePath
+
+tasks.register<Exec>("buildTunLib") {
+    group = "build"
+
+    val outputDir = layout.buildDirectory.dir("native").get().asFile
+
+    doFirst {
+        outputDir.mkdirs()
+    }
+
+    commandLine(
+        "gcc",
+        "-shared",
+        "-fPIC",
+        "-z", "noexecstack",
+
+        "-o",
+        "${outputDir.absolutePath}/libtun.so",
+
+        "src/main/c/tun.c",
+
+        "-I$javaHome/include",
+        "-I$javaHome/include/linux"
+    )
 }