imaxdiv: Avoid link error on OSF/1 with DTK cc.

[gnulib.git] / lib / error.c

diff --git a/lib/error.c b/lib/error.c
index 71963ce..7482baa 100644 (file)
--- a/lib/error.c
+++ b/lib/error.c
@@ -1,5 +1,5 @@
 /* Error handler for noninteractive utilities
-   Copyright (C) 1990-1998, 2000-2007, 2009 Free Software Foundation, Inc.
+   Copyright (C) 1990-1998, 2000-2007, 2009-2011 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    This program is free software: you can redistribute it and/or modify
@@ -88,11 +88,24 @@ extern void __error_at_line (int status, int errnum, const char *file_name,
 # include <fcntl.h>
 # include <unistd.h>
 
-# if !HAVE_DECL_STRERROR_R && STRERROR_R_CHAR_P
+# if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__
+/* Get declarations of the Win32 API functions.  */
+#  define WIN32_LEAN_AND_MEAN
+#  include <windows.h>
+# endif
+
+/* The gnulib override of fcntl is not needed in this file.  */
+# undef fcntl
+
+# if !HAVE_DECL_STRERROR_R
 #  ifndef HAVE_DECL_STRERROR_R
 "this configure-time declaration test was not run"
 #  endif
+#  if STRERROR_R_CHAR_P
 char *strerror_r ();
+#  else
+int strerror_r ();
+#  endif
 # endif
 
 /* The calling program should define program_name and set it to the
@@ -104,10 +117,29 @@ extern char *program_name;
 # endif /* HAVE_STRERROR_R || defined strerror_r */
 #endif  /* not _LIBC */
 
+#if !_LIBC
+/* Return non-zero if FD is open.  */
+static inline int
+is_open (int fd)
+{
+# if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__
+  /* On Win32: The initial state of unassigned standard file descriptors is
+     that they are open but point to an INVALID_HANDLE_VALUE.  There is no
+     fcntl, and the gnulib replacement fcntl does not support F_GETFL.  */
+  return (HANDLE) _get_osfhandle (fd) != INVALID_HANDLE_VALUE;
+# else
+#  ifndef F_GETFL
+#   error Please port fcntl to your platform
+#  endif
+  return 0 <= fcntl (fd, F_GETFL);
+# endif
+}
+#endif
+
 static inline void
 flush_stdout (void)
 {
-#if !_LIBC && defined F_GETFL
+#if !_LIBC
   int stdout_fd;
 
 # if GNULIB_FREOPEN_SAFER
@@ -124,7 +156,7 @@ flush_stdout (void)
   /* POSIX states that fflush (stdout) after fclose is unspecified; it
      is safe in glibc, but not on all other platforms.  fflush (NULL)
      is always defined, but too draconian.  */
-  if (0 <= stdout_fd && 0 <= fcntl (stdout_fd, F_GETFL))
+  if (0 <= stdout_fd && is_open (stdout_fd))
 #endif
     fflush (stdout);
 }