Declare system functions in a way that works with C++.

[gnulib.git] / m4 / getlogin_r.m4

diff --git a/m4/getlogin_r.m4 b/m4/getlogin_r.m4
index ad15c98..eb67444 100644 (file)
--- a/m4/getlogin_r.m4
+++ b/m4/getlogin_r.m4
@@ -1,4 +1,4 @@
-#serial 10
+#serial 11
 
 # Copyright (C) 2005-2007, 2009-2011 Free Software Foundation, Inc.
 #
@@ -50,7 +50,11 @@ changequote([,])dnl
 #include <stddef.h>
 #include <unistd.h>
 #if !HAVE_DECL_GETLOGIN_R
-extern int getlogin_r (char *, size_t);
+extern
+# ifdef __cplusplus
+"C"
+# endif
+int getlogin_r (char *, size_t);
 #endif
 int
 main (void)