2 # Copyright (C) 2007, 2009-2017 Free Software Foundation, Inc.
3 # This file is free software; the Free Software Foundation
4 # gives unlimited permission to copy and/or distribute it,
5 # with or without modifications, as long as this notice is preserved.
7 # Written by Ben Pfaff.
9 # Check whether to use a replacement tmpfile() function.
11 # The native Windows tmpfile function always tries to put the temporary
12 # file in the root directory. (This behaviour is even documented in
13 # Microsoft's documentation!) This often fails for ordinary users who
14 # don't have the permissions to write in the root directory.
16 # We can't test for tmpfile even at runtime, since our test program
17 # might be running with privileges that allow it to write to the root
18 # directory, even though tmpfile wouldn't work in general. Instead,
19 # just test for a Windows platform (excluding Cygwin).
21 AC_DEFUN([gl_FUNC_TMPFILE], [
22 AC_REQUIRE([gl_STDIO_H_DEFAULTS])
23 AC_CACHE_CHECK([whether tmpfile should be overridden],
24 [gl_cv_func_tmpfile_unusable],
25 [AC_EGREP_CPP([choke me], [
26 #if (defined _WIN32 || defined __WIN32__) && !defined __CYGWIN__
30 [gl_cv_func_tmpfile_unusable=yes],
31 [gl_cv_func_tmpfile_unusable=no])])
32 if test $gl_cv_func_tmpfile_unusable = yes; then
37 # Prerequisites of lib/tmpfile.c.
38 AC_DEFUN([gl_PREREQ_TMPFILE], [:])