Revert "Allow to disable legacy interface via configure"

This reverts commit 64ec6ec2.

configure.ac

@@ -1222,18 +1222,6 @@ if test x"${USE_ASSUMED_SIZE}" = x"yes" ; then
   AC_DEFINE([USE_ASSUMED_SIZE],[1],[for performance reasons use assumed size Fortran arrays, even if not debuggable])
 fi
 
-dnl check for legacy interface
-AC_MSG_CHECKING(whether legacy interface is requested)
-AC_ARG_ENABLE([legacy-interface],
-		AS_HELP_STRING([--enable-legacy-interface],
-			       [check whether legacy interface should be provided, default yes]),
-	      [provide_legacy_interface=${enableval}],
-	      [provide_legacy_interface=yes])
-AC_MSG_RESULT([$provide_legacy_interface])
-if test x"${enableval}" = x"no" ; then
-  provide_legacy_interface=no
-fi
-
 if test x"${want_single_precision}" = x"yes" ; then
   AC_DEFINE([WANT_SINGLE_PRECISION_REAL],[1],[build also single-precision for real calculation])
   AC_DEFINE([WANT_SINGLE_PRECISION_COMPLEX],[1],[build also single-precision for complex calculation])
@@ -1241,11 +1229,6 @@ fi
 AM_CONDITIONAL([WANT_SINGLE_PRECISION_REAL],[test x"$want_single_precision" = x"yes"])
 AM_CONDITIONAL([WANT_SINGLE_PRECISION_COMPLEX],[test x"$want_single_precision" = x"yes"])
 
-AM_CONDITIONAL([WITH_LEGACY_INTERFACE],[test x"$provide_legacy_interface" = x"yes"])
-if test x"${provide_legacy_interface}" = x"yes"; then
-	AC_DEFINE([WITH_LEGACY_INTERFACE], [1], [provide legacy interface])
-fi
-
 AC_SUBST([MPI_BINARY])
 AC_SUBST([WITH_MKL])
 AC_SUBST([WITH_BLACS])
@@ -1330,6 +1313,7 @@ else
         AC_MSG_RESULT([no])
 fi
 
+
 AC_OUTPUT
 
 if test "${can_compile_avx}" = "no" ; then
@@ -1360,4 +1344,3 @@ echo "*  the next stable release.                                           *"
 echo "***********************************************************************"
 echo " "
 make -f $srcdir/generated_headers.am generated-headers top_srcdir="$srcdir"
-

src/elpa2/elpa2_print_kernels.F90

@@ -68,8 +68,8 @@
 program print_available_elpa2_kernels
 
    use precision
-   !use elpa1_impl
-   !use elpa2
+   use elpa1
+   use elpa2
 
    use elpa2_utilities
    use elpa2_utilities_private