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-rw-r--r--misc/sys/cdefs.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/misc/sys/cdefs.h b/misc/sys/cdefs.h
index 1c2b044a0d..f525f67547 100644
--- a/misc/sys/cdefs.h
+++ b/misc/sys/cdefs.h
@@ -27,8 +27,8 @@
 /* The GNU libc does not support any K&R compilers or the traditional mode
    of ISO C compilers anymore.  Check for some of the combinations not
    supported anymore.  */
-#if defined __GNUC__ && !defined __STDC__
-# error "You need a ISO C conforming compiler to use the glibc headers"
+#if defined __GNUC__ && !defined __STDC__ && !defined __cplusplus
+# error "You need a ISO C or C++ conforming compiler to use the glibc headers"
 #endif
 
 /* Some user header file might have defined this before.  */