Suppress deprecation warnings for Java 18 for Unsafe usage.

agrona/src/main/java/org/agrona/BufferUtil.java

@@ -44,6 +44,7 @@ public final class BufferUtil
     /**
      * Byte array base offset.
      */
+    @SuppressWarnings("deprecation")
     public static final long ARRAY_BASE_OFFSET = UNSAFE.arrayBaseOffset(byte[].class);
 
     /**

agrona/src/main/java/org/agrona/concurrent/AbstractConcurrentArrayQueue.java

@@ -92,6 +92,7 @@ abstract class AbstractConcurrentArrayQueuePadding3 extends AbstractConcurrentAr
 /**
  * Left over immutable queue fields.
  */
+@SuppressWarnings("deprecation")
 public abstract class AbstractConcurrentArrayQueue<E>
     extends AbstractConcurrentArrayQueuePadding3
     implements QueuedPipe<E>

agrona/src/main/java/org/agrona/concurrent/ManyToOneConcurrentLinkedQueue.java

@@ -25,6 +25,7 @@
 /**
  * Pad out a cache line to the left of a tail to prevent false sharing.
  */
+@SuppressWarnings("deprecation")
 abstract class ManyToOneConcurrentLinkedQueuePadding1
 {
     /**

build.gradle

@@ -202,9 +202,7 @@ subprojects {
             options.forkOptions.javaHome = javaHome.toFile()
         }
 
-        if (buildJavaVersion < 18) {
-            options.compilerArgs.addAll(['-Xlint:all', '-Werror']) // Enable all warnings and treat them as errors
-        }
+        options.compilerArgs.addAll(['-Xlint:all', '-Werror']) // Enable all warnings and treat them as errors
         options.compilerArgs.add('-XDignore.symbol.file') // Suppress warnings about using Unsafe
         options.encoding = 'UTF-8'
         options.deprecation = true