Compile time futex syscall detection

[urcu.git] / include / urcu / futex.h

diff --git a/include/urcu/futex.h b/include/urcu/futex.h
index f720cdc0db52ed41cd391bec9b570464492a026e..039d3930c45f99eb26baa2f342a8837e8f39853f 100644 (file)
--- a/include/urcu/futex.h
+++ b/include/urcu/futex.h
@@ -24,6 +24,8 @@
  */
 
 #include <urcu/config.h>
+#include <urcu/syscall-compat.h>
+
 #include <errno.h>
 #include <stdint.h>
 #include <time.h>
@@ -54,7 +56,10 @@ extern int compat_futex_noasync(int32_t *uaddr, int op, int32_t val,
 extern int compat_futex_async(int32_t *uaddr, int op, int32_t val,
                const struct timespec *timeout, int32_t *uaddr2, int32_t val3);
 
-#ifdef CONFIG_RCU_HAVE_FUTEX
+#if (defined(__linux__) && defined(__NR_futex_))
+
+/* For backwards compat */
+#define CONFIG_RCU_HAVE_FUTEX 1
 
 #include <unistd.h>
 #include <errno.h>