Add SMT detection for mac. Fixes #963.
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Change-Id: Ib83af0d0a04dc6b173bef1df28d17abc7a3c824d
Reviewed-on: https://bazel-review.googlesource.com/#/c/3120/
MOS_MIGRATED_REVID=119027507
diff --git a/src/main/java/com/google/devtools/build/lib/unix/NativePosixSystem.java b/src/main/java/com/google/devtools/build/lib/unix/NativePosixSystem.java
new file mode 100644
index 0000000..9834f24
--- /dev/null
+++ b/src/main/java/com/google/devtools/build/lib/unix/NativePosixSystem.java
@@ -0,0 +1,43 @@
+// Copyright 2016 The Bazel Authors. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package com.google.devtools.build.lib.unix;
+
+import com.google.devtools.build.lib.UnixJniLoader;
+
+import java.io.IOException;
+
+/**
+ * Utility methods for access to UNIX system calls not exposed by the Java
+ * SDK. Exception messages are selected to be consistent with those generated
+ * by the java.io package where appropriate--see package javadoc for details.
+ */
+public class NativePosixSystem {
+
+ private NativePosixSystem() {}
+
+ static {
+ if (!"0".equals(System.getProperty("io.bazel.UnixFileSystem"))) {
+ UnixJniLoader.loadJni();
+ }
+ }
+
+ /**
+ * Native wrapper around POSIX sysctlbyname(3) syscall.
+ *
+ * @param name the name for value to get from sysctl
+ * @throws IOException iff the sysctlbyname() syscall failed.
+ */
+ public static native long sysctlbynameGetLong(String name) throws IOException;
+}
