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-rw-r--r--include/tls.h19
1 files changed, 19 insertions, 0 deletions
diff --git a/include/tls.h b/include/tls.h
new file mode 100644
index 000000000..a1da3827b
--- /dev/null
+++ b/include/tls.h
@@ -0,0 +1,19 @@
+/* This file defines USE___THREAD to 1 or 0 to cut down on the #if mess. */
+
+#ifndef _include_tls_h
+#define _include_tls_h 1
+
+#include_next <tls.h>
+
+#if USE_TLS && HAVE___THREAD \
+ && (!defined NOT_IN_libc || defined IS_IN_libpthread || defined IS_IN_librt)
+
+# define USE___THREAD 1
+
+#else
+
+# define USE___THREAD 0
+
+#endif
+
+#endif