uhd

#serial 4

# 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([UTILS_FUNC_MKSTEMP],

[dnl

  AC_REPLACE_FUNCS(mkstemp)

  if test $ac_cv_func_mkstemp = no; then

    utils_cv_func_mkstemp_limitations=yes

  else

    AC_CACHE_CHECK([for mkstemp limitations],

      utils_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);

	  }

	  ],

	utils_cv_func_mkstemp_limitations=no,

	utils_cv_func_mkstemp_limitations=yes,

	utils_cv_func_mkstemp_limitations=yes

	)

      ]

    )

  fi

  if test $utils_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

    jm_PREREQ_TEMPNAME

  fi

])

# Prerequisites of lib/mkstemp.c.

AC_DEFUN([gl_PREREQ_MKSTEMP],

[

  AH_BOTTOM(

  [

  #ifndef HAVE_MKSTEMP

  #ifdef  __cplusplus

  extern "C" {

  #endif

  int rpl_mkstemp (char *templ);

  #ifdef  __cplusplus

  }

  #endif

  #endif

  ])

])

# Prerequisites of lib/tempname.c.

AC_DEFUN([jm_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 lstat)

  AC_CHECK_DECLS_ONCE(getenv)

  # AC_REQUIRE([jm_AC_TYPE_UINTMAX_T])

  dnl Under Win32, mkdir prototype in io.h has only one arg

  AC_MSG_CHECKING(whether mkdir accepts only one arg)

  AC_TRY_COMPILE([#include <sys/types.h>

       #include <sys/stat.h>

       #include <fcntl.h>], [

       mkdir("")

  ], [ AC_MSG_RESULT(yes)

     AC_DEFINE(MKDIR_TAKES_ONE_ARG,[],[Define if mkdir accepts only one arg]) ],

   [ AC_MSG_RESULT(no)

     ])

])