3 # Copyright (C) 2001, 2003-2007, 2009-2010 Free Software Foundation, Inc.
4 # This file is free software; the Free Software Foundation
5 # gives unlimited permission to copy and/or distribute it,
6 # with or without modifications, as long as this notice is preserved.
8 # On some hosts (e.g., HP-UX 10.20, SunOS 4.1.4, Solaris 2.5.1), mkstemp has a
9 # silly limit that it can create no more than 26 files from a given template.
10 # Other systems lack mkstemp altogether.
11 # On OSF1/Tru64 V4.0F, the system-provided mkstemp function can create
12 # only 32 files per process.
13 # On systems like the above, arrange to use the replacement function.
14 AC_DEFUN([gl_FUNC_MKSTEMP],
16 AC_REQUIRE([gl_STDLIB_H_DEFAULTS])
17 AC_REQUIRE([AC_SYS_LARGEFILE])
19 AC_CHECK_FUNCS_ONCE([mkstemp])
20 if test $ac_cv_func_mkstemp = yes; then
21 AC_CACHE_CHECK([for working mkstemp],
22 [gl_cv_func_working_mkstemp],
24 mkdir conftest.mkstemp
27 [AC_INCLUDES_DEFAULT],
29 off_t large = (off_t) 4294967295u;
32 for (i = 0; i < 70; i++)
34 char templ[] = "conftest.mkstemp/coXXXXXX";
35 int (*mkstemp_function) (char *) = mkstemp;
36 int fd = mkstemp_function (templ);
37 if (fd < 0 || lseek (fd, large, SEEK_SET) != large)
42 [gl_cv_func_working_mkstemp=yes],
43 [gl_cv_func_working_mkstemp=no],
44 [gl_cv_func_working_mkstemp=no])
45 rm -rf conftest.mkstemp
47 if test $gl_cv_func_working_mkstemp != yes; then
59 # Prerequisites of lib/mkstemp.c.
60 AC_DEFUN([gl_PREREQ_MKSTEMP],