#serial 6

# On some hosts (e.g., HP-UX 10.20, SunOS 4.1.4, Solaris 2.5.1), mkstemp has a
# silly limit that it can create no more than 26 files from a given template.
# Other systems lack mkstemp altogether.
# On OSF1/Tru64 V4.0F, the system-provided mkstemp function can create
# only 32 files per process.
# On systems like the above, arrange to use the replacement function.
AC_DEFUN([gl_FUNC_MKSTEMP],
[dnl
 AC_REPLACE_FUNCS(mkstemp)
 if test $ac_cv_func_mkstemp = no; then
   gl_cv_func_mkstemp_limitations=yes
 else
   AC_CACHE_CHECK([for mkstemp limitations],
     gl_cv_func_mkstemp_limitations,
     [
       AC_TRY_RUN([
#         include <stdlib.h>
         int main ()
         {
           int i;
           for (i = 0; i < 70; i++)
             {
               char template[] = "conftestXXXXXX";
               int fd = mkstemp (template);
               if (fd == -1)
                 exit (1);
               close (fd);
             }
           exit (0);
         }
         ],
       gl_cv_func_mkstemp_limitations=no,
       gl_cv_func_mkstemp_limitations=yes,
       gl_cv_func_mkstemp_limitations=yes
       )
     ]
   )
 fi

 if test $gl_cv_func_mkstemp_limitations = yes; then
   AC_LIBOBJ(mkstemp)
   AC_LIBOBJ(tempname)
   AC_DEFINE(mkstemp, rpl_mkstemp,
     [Define to rpl_mkstemp if the replacement function should be used.])
   gl_PREREQ_MKSTEMP
   gl_PREREQ_TEMPNAME
 fi
])

# Prerequisites of lib/mkstemp.c.
AC_DEFUN([gl_PREREQ_MKSTEMP],
[
])

# Prerequisites of lib/tempname.c.
AC_DEFUN([gl_PREREQ_TEMPNAME],
[
 AC_REQUIRE([AC_HEADER_STAT])
 AC_CHECK_HEADERS_ONCE(fcntl.h sys/time.h unistd.h)
 AC_CHECK_HEADERS(stdint.h)
 AC_CHECK_FUNCS(__secure_getenv gettimeofday)
 AC_CHECK_DECLS_ONCE(getenv)
 AC_REQUIRE([gl_AC_TYPE_UINTMAX_T])
])