Undef feature selection macros before defining.

diff --git a/src/lread.c b/src/lread.c
index 8b2564c379264d5885ce5d88fbc54e6518cbaf9c..699c7fc2ef9b0601e2e72679d545c112aa21dd4e 100644 (file)
--- a/src/lread.c
+++ b/src/lread.c
@@ -21,7 +21,12 @@ Boston, MA 02111-1307, USA.  */
 
 
 #include <config.h>
+/* The following feature selections should be in config.h, but that
+   causes at best a host of warnings on some systems.  */
+#undef _XOPEN_SOURCE           /* Avoid warnings about redefinition
+                                  in some cases.  */
 #define _XOPEN_SOURCE 500      /* for Unix 98 ftello on GNU */
+#undef __EXTENSIONS__
 #define __EXTENSIONS__         /* Keep Solaris 2.6 happy with the
                                   above, else things we need are hidden.  */
 #include <stdio.h>