configure: Remove test for compiler feature no longer needed.

configure.ac

@@ -156,8 +156,6 @@ AC_LANG_POP([Fortran])
 ACX_FC_STRUCT_RETURN_HLF([Xt_fc_hlf_struct_return=:],
   [Xt_fc_hlf_struct_return=false
    AC_MSG_WARN([Disabling Fortran interface for bucket generator])])
-ACX_FC_VOLATILE([XT_FC_FEATURE_DEFS="$XT_FC_FEATURE_DEFS
-@%:@define HAVE_VOLATILE"])
 ACX_FC_HAVE_SIZE_KIND_ARGUMENT([XT_FC_FEATURE_DEFS="$XT_FC_FEATURE_DEFS
 @%:@define HAVE_SIZE_KIND_ARGUMENT"])
 AC_FC_DUMMY_MAIN(,[:])

m4/acx_fc_volatile.m4

-dnl acx_fc_volatile.m4 --- test whether the compiler supports volatile declaration
-dnl
-dnl Copyright  (C)  2010  Thomas Jahns <jahns@dkrz.de>
-dnl
-dnl Version: 1.0
-dnl Keywords:
-dnl Author: Thomas Jahns <jahns@dkrz.de>
-dnl Maintainer: Thomas Jahns <jahns@dkrz.de>
-dnl URL: https://swprojects.dkrz.de/redmine/projects/scales-ppm
-dnl
-dnl Redistribution and use in source and binary forms, with or without
-dnl modification, are  permitted provided that the following conditions are
-dnl met:
-dnl
-dnl Redistributions of source code must retain the above copyright notice,
-dnl this list of conditions and the following disclaimer.
-dnl
-dnl Redistributions in binary form must reproduce the above copyright
-dnl notice, this list of conditions and the following disclaimer in the
-dnl documentation and/or other materials provided with the distribution.
-dnl
-dnl Neither the name of the DKRZ GmbH nor the names of its contributors
-dnl may be used to endorse or promote products derived from this software
-dnl without specific prior written permission.
-dnl
-dnl THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
-dnl IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
-dnl TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
-dnl PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
-dnl OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
-dnl EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
-dnl PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
-dnl PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
-dnl LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
-dnl NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
-dnl SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-dnl
-dnl
-AC_DEFUN([ACX_FC_VOLATILE],
-  [AC_REQUIRE([AC_PROG_FC])dnl
-   AC_LANG_PUSH([Fortran])
-   AC_MSG_CHECKING([whether $FC supports volatile variable attribute])
-   AC_COMPILE_IFELSE(
-[      SUBROUTINE f(p)
-      REAL, INTENT(IN) :: p
-      REAL :: x
-      VOLATILE :: x
-      x = x + 1.0
-      END SUBROUTINE f],
-     [AC_MSG_RESULT([yes])
-      $1],
-     [AC_MSG_RESULT([no])
-      $2])
-   AC_LANG_POP([Fortran])])
-dnl
-dnl Local Variables:
-dnl mode: autoconf
-dnl license-project-url: "https://swprojects.dkrz.de/redmine/projects/scales-ppm"
-dnl license-default: "bsd"
-dnl End: