gnulib: update to 776af40e0users/simark/update-gnulib

This fixes PR27184, a failure to compile gdb due to
cdefs.h being out of sync with glibc on ppc64le targets
which are compiled with -mabi=ieeelongdouble and glibc
2.32.

Likewise, update usage of _GL_ATTRIBUTE_FORMAT_PRINTF to
_GL_ATTRIBUTE_FORMAT_PRINTF_STANDARD.

Likewise, disable newly added rpl_free gnulib api in
gdbserver support libraries.

Likewise, undefine read/write macros before redefining them
on mingw targets.

Likewise, wrap C++ usage of free with GNULIB_NAMESPACE namespace
as needed.

Change-Id: I86517613c0d8ac8f5ea45bbc4ebe2b54a3aef29f

1 files changed, 3 insertions, 7 deletions

diff --git a/gnulib/import/pipe-safer.c b/gnulib/import/pipe-safer.c
index 5a597c5..efa4bd6 100644
--- a/gnulib/import/pipe-safer.c
+++ b/gnulib/import/pipe-safer.c
@@ -1,5 +1,5 @@
 /* Invoke pipe, but avoid some glitches.
-   Copyright (C) 2005-2006, 2009-2020 Free Software Foundation, Inc.
+   Copyright (C) 2005-2006, 2009-2021 Free Software Foundation, Inc.
 
    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -30,7 +30,6 @@
 int
 pipe_safer (int fd[2])
 {
-#if HAVE_PIPE
   if (pipe (fd) == 0)
     {
       int i;
@@ -39,18 +38,15 @@ pipe_safer (int fd[2])
           fd[i] = fd_safer (fd[i]);
           if (fd[i] < 0)
             {
-              int e = errno;
+              int saved_errno = errno;
               close (fd[1 - i]);
-              errno = e;
+              errno = saved_errno;
               return -1;
             }
         }
 
       return 0;
     }
-#else
-  errno = ENOSYS;
-#endif
 
   return -1;
 }