newlib/libc/include/devctl.h: Add extern "C" wrapper

Adding this was necessary to allow posix_devctl() from C++.

diff --git a/newlib/libc/include/devctl.h b/newlib/libc/include/devctl.h
index fd3409f8918d5e69e1471f7f862c44c6536d83da..889693e1db0a936cfd2a9666e7cdef06a815fa70 100644 (file)
--- a/newlib/libc/include/devctl.h
+++ b/newlib/libc/include/devctl.h
@@ -35,6 +35,10 @@
 
 #include <sys/cdefs.h>
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 #if defined(__rtems__)
 /*
  * The FACE Technical Standard, Edition 3.0 and later require the
@@ -67,4 +71,8 @@ int posix_devctl(
 );
 #endif
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif