view m4/flock.m4 @ 17275:ce300324a44c

doc: improve ISO 8601 discussion * doc/parse-datetime.texi (Combined date and time of day items): Specify more carefully what formats are supported and what is done with excess precision.
author Paul Eggert <eggert@cs.ucla.edu>
date Sun, 06 Jan 2013 07:31:32 -0800
parents e542fd46ad6f
children
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# flock.m4 serial 3
dnl Copyright (C) 2008-2013 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.

AC_DEFUN([gl_FUNC_FLOCK],
[
  AC_REQUIRE([gl_HEADER_SYS_FILE_H_DEFAULTS])
  AC_CHECK_FUNCS_ONCE([flock])
  if test $ac_cv_func_flock = no; then
    HAVE_FLOCK=0
  fi
])

dnl Prerequisites of lib/flock.c.
AC_DEFUN([gl_PREREQ_FLOCK],
[
  AC_CHECK_FUNCS_ONCE([fcntl])
  AC_CHECK_HEADERS_ONCE([unistd.h])

  dnl Do we have a POSIX fcntl lock implementation?
  AC_CHECK_MEMBERS([struct flock.l_type],[],[],[[#include <fcntl.h>]])
])