3 # Copyright (C) 2001, 2003-2007, 2009-2011 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],
30 off_t large = (off_t) 4294967295u;
33 for (i = 0; i < 70; i++)
35 char templ[] = "conftest.mkstemp/coXXXXXX";
36 int (*mkstemp_function) (char *) = mkstemp;
37 int fd = mkstemp_function (templ);
42 if (lseek (fd, large, SEEK_SET) != large)
48 [gl_cv_func_working_mkstemp=yes],
49 [gl_cv_func_working_mkstemp=no],
50 [gl_cv_func_working_mkstemp=no])
51 rm -rf conftest.mkstemp
53 if test $gl_cv_func_working_mkstemp != yes; then
65 # Prerequisites of lib/mkstemp.c.
66 AC_DEFUN([gl_PREREQ_MKSTEMP],