Update m4 macros.

configure

@@ -15677,6 +15677,7 @@ rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
       ac_fcflags_srcext=$acx_fcflags_srcext_save
       ac_ext=$acx_ext_save
 fi
+
    if test -n "$acx_cv_fc_pp_srcext_f90"; then :
   { $as_echo "$as_me:${as_lineno-$LINENO}: result: $acx_cv_fc_pp_srcext_f90" >&5
 $as_echo "$acx_cv_fc_pp_srcext_f90" >&6; }
@@ -16092,6 +16093,7 @@ fi
       rm -f conftest.$ac_ext
       LIBS=$acx_save_LIBS
 fi
+
    if ${acx_cv_c_lib_func_tcase_create+:} false; then :
   if test -n "$acx_cv_c_lib_func_tcase_create"; then :
   { $as_echo "$as_me:${as_lineno-$LINENO}: result: $acx_cv_c_lib_func_tcase_create" >&5

m4/acx_fc_pp.m4

@@ -44,8 +44,7 @@ AC_DEFUN([ACX_FC_PP_SRCEXT],
    m4_pushdef([acx_cache_var], [acx_cv_fc_pp_srcext_$1])dnl
    AC_MSG_CHECKING([for Fortran compiler flag needed to compile dnl
 preprocessed .$1 files])
-   AS_VAR_SET_IF([acx_cache_var],
-     [AS_ECHO_N(["(cached) "]) >&AS_MESSAGE_FD],
+   AC_CACHE_VAL([acx_cache_var],
      [acx_cache_var=unknown
       acx_ext_save=$ac_ext
       acx_fcflags_srcext_save=$ac_fcflags_srcext

m4/acx_lang_lib.m4

@@ -108,8 +108,7 @@ m4_define([ACX_LANG_LIB_SEARCH()],
   [m4_pushdef([acx_cache_var],
      [acx_cv_[]_AC_LANG_ABBREV[]_lib_func_[]AS_TR_SH([$2])])dnl
    AC_MSG_CHECKING([for linker flags enabling _AC_LANG function $2])
-   AS_VAR_SET_IF([acx_cache_var],
-     [AS_ECHO_N(["(cached) "]) >&AS_MESSAGE_FD],
+   AC_CACHE_VAL([acx_cache_var],
      [AC_LANG_CONFTEST([m4_default([$6], [AC_LANG_CALL([], [$2])])])
       acx_save_LIBS=$LIBS
       AS_VAR_SET_IF([$1], [set dummy "AS_VAR_GET([$1])"], [set dummy '' $3])