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-rw-r--r--gnulib/import/m4/dup.m47
1 files changed, 4 insertions, 3 deletions
diff --git a/gnulib/import/m4/dup.m4 b/gnulib/import/m4/dup.m4
index 1bf0234..433a466 100644
--- a/gnulib/import/m4/dup.m4
+++ b/gnulib/import/m4/dup.m4
@@ -1,5 +1,5 @@
-# dup.m4 serial 6
-dnl Copyright (C) 2011-2020 Free Software Foundation, Inc.
+# dup.m4 serial 7
+dnl Copyright (C) 2011-2021 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.
@@ -26,7 +26,8 @@ AC_DEFUN([gl_FUNC_DUP],
[AC_RUN_IFELSE(
[AC_LANG_PROGRAM([[#include <unistd.h>
#include <fcntl.h>
- #include <errno.h>]],
+ #include <errno.h>
+ ]GL_MDA_DEFINES],
[[/* On OS/2 kLIBC, dup does not work on a directory fd. */
int fd = open (".", O_RDONLY);
return fd < 0 ? 1 : dup (fd) < 0 ? 2 : 0;