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# tmpfile.m4 serial 1
# Copyright (C) 2007, 2009, 2010 Free Software Foundation, Inc.
# This file is free software; the Free Software Foundation
# gives unlimited permission to copy and/or distribute it,
# with or without modifications, as long as this notice is preserved.
# Written by Ben Pfaff.
# Check whether to use a replacement tmpfile() function.
# The native Windows tmpfile function always tries to put the temporary
# file in the root directory. (This behaviour is even documented in
# Microsoft's documentation!) This often fails for ordinary users who
# don't have the permissions to write in the root directory.
#
# We can't test for tmpfile even at runtime, since our test program
# might be running with privileges that allow it to write to the root
# directory, even though tmpfile wouldn't work in general. Instead,
# just test for a Windows platform (excluding Cygwin).
AC_DEFUN([gl_FUNC_TMPFILE], [
AC_REQUIRE([gl_STDIO_H_DEFAULTS])
AC_CACHE_CHECK([whether tmpfile should be overridden],
[gl_cv_func_tmpfile_unusable],
[AC_EGREP_CPP([choke me], [
#if (defined _WIN32 || defined __WIN32__) && !defined __CYGWIN__
choke me
#endif
],
[gl_cv_func_tmpfile_unusable=yes],
[gl_cv_func_tmpfile_unusable=no])])
if test $gl_cv_func_tmpfile_unusable = yes; then
REPLACE_TMPFILE=1
AC_LIBOBJ([tmpfile])
gl_PREREQ_TMPFILE
fi
])
# Prerequisites of lib/tmpfile.c.
AC_DEFUN([gl_PREREQ_TMPFILE], [:])
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