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      1 #serial 11
      2 
      3 # Copyright (C) 2001, 2003, 2004, 2005 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.
      7 
      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],
     15 [dnl
     16   AC_REPLACE_FUNCS(mkstemp)
     17   if test $ac_cv_func_mkstemp = no; then
     18     gl_cv_func_mkstemp_limitations=yes
     19   else
     20     AC_CACHE_CHECK([for mkstemp limitations],
     21       gl_cv_func_mkstemp_limitations,
     22       [
     23         mkdir conftest.mkstemp
     24 	AC_TRY_RUN([
     25 #           include <stdlib.h>
     26 #           include <unistd.h>
     27 	    int main ()
     28 	    {
     29 	      int i;
     30 	      for (i = 0; i < 70; i++)
     31 		{
     32 		  char template[] = "conftest.mkstemp/coXXXXXX";
     33 		  int fd = mkstemp (template);
     34 		  if (fd == -1)
     35 		    exit (1);
     36 		  close (fd);
     37 		}
     38 	      exit (0);
     39 	    }
     40 	    ],
     41 	  gl_cv_func_mkstemp_limitations=no,
     42 	  gl_cv_func_mkstemp_limitations=yes,
     43 	  gl_cv_func_mkstemp_limitations=yes
     44 	  )
     45         rm -rf conftest.mkstemp
     46       ]
     47     )
     48   fi
     49 
     50   if test $gl_cv_func_mkstemp_limitations = yes; then
     51     AC_LIBOBJ(mkstemp)
     52     AC_LIBOBJ(tempname)
     53     AC_DEFINE(mkstemp, rpl_mkstemp,
     54       [Define to rpl_mkstemp if the replacement function should be used.])
     55     gl_PREREQ_MKSTEMP
     56     gl_PREREQ_TEMPNAME
     57   fi
     58 ])
     59 
     60 # Prerequisites of lib/mkstemp.c.
     61 AC_DEFUN([gl_PREREQ_MKSTEMP],
     62 [
     63 ])
     64 
     65 # Prerequisites of lib/tempname.c.
     66 AC_DEFUN([gl_PREREQ_TEMPNAME],
     67 [
     68   AC_CHECK_HEADERS_ONCE(sys/time.h stdint.h unistd.h)
     69   AC_CHECK_FUNCS(__secure_getenv gettimeofday)
     70   AC_CHECK_DECLS_ONCE(getenv)
     71   AC_REQUIRE([gl_AC_TYPE_UINTMAX_T])
     72 ])
     73