Downgrade cfortran.h failure to warning.

configure

@@ -29158,32 +29158,29 @@ ac_compiler_gnu=$ac_cv_c_compiler_gnu
 fi
 { $as_echo "$as_me:${as_lineno-$LINENO}: result: $acx_cv_cfortran_works" >&5
 $as_echo "$acx_cv_cfortran_works" >&6; }
-   case x"$acx_cv_cfortran_works" in #(
+   if test x"$acx_cv_cfortran_works" = xyes; then :
+
+$as_echo "#define HAVE_CF_INTERFACE 1" >>confdefs.h
+
+else
+  case x"$acx_cv_cfortran_works" in #(
   x"error") :
-    { { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
-$as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
-as_fn_error $? "Linking/Running with C EXTERNAL built with cfortran.h does not work!
-See \`config.log' for more details" "$LINENO" 5; } ;; #(
+    { $as_echo "$as_me:${as_lineno-$LINENO}: Linking/Running with C EXTERNAL built with cfortran.h does not work!" >&5
+$as_echo "$as_me: Linking/Running with C EXTERNAL built with cfortran.h does not work!" >&6;} ;; #(
   x"compiling with cfortran.h failed") :
-    { { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
-$as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
-as_fn_error $? "Compilation with cfortran.h is not working!
-See \`config.log' for more details" "$LINENO" 5; } ;; #(
+    { $as_echo "$as_me:${as_lineno-$LINENO}: Compilation with cfortran.h is not working!" >&5
+$as_echo "$as_me: Compilation with cfortran.h is not working!" >&6;} ;; #(
   x"error compiling Fortran subroutine") :
-    { { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
-$as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
-as_fn_error $? "compilation of simple Fortran source failed!
-See \`config.log' for more details" "$LINENO" 5; } ;; #(
-  xyes) :
-
-$as_echo "#define HAVE_CF_INTERFACE 1" >>confdefs.h
- ;; #(
+    { $as_echo "$as_me:${as_lineno-$LINENO}: compilation of simple Fortran source failed!" >&5
+$as_echo "$as_me: compilation of simple Fortran source failed!" >&6;} ;; #(
   *) :
-    { { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
-$as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
-as_fn_error $? "Unexpected error when linking C and Fortran via cfortran.h!
-See \`config.log' for more details" "$LINENO" 5; } ;;
+    { $as_echo "$as_me:${as_lineno-$LINENO}: Unexpected error when linking C and Fortran via cfortran.h!" >&5
+$as_echo "$as_me: Unexpected error when linking C and Fortran via cfortran.h!" >&6;} ;;
 esac
+     { $as_echo "$as_me:${as_lineno-$LINENO}: Disabling cfortran.h bindings generation" >&5
+$as_echo "$as_me: Disabling cfortran.h bindings generation" >&6;}
+     acx_cv_cfortran_works=no
+fi
 fi
  if test -n "$FC" -a X"$FC" != Xno -a x"$acx_cv_cfortran_works" = xyes; then

configure.ac

@@ -328,7 +328,17 @@ ACX_XLF_QEXTNAME_ADD_APPENDUS
 AS_IF([test -n "$FC" -a X"$FC" != Xno -o -n "$F77" -a X"$F77" != Xno],
   [ACX_CHECK_CFORTRAN([$srcdir/src],
     [AC_DEFINE([HAVE_CF_INTERFACE],[1],
-       [Defined to 1 if C / Fortran interface cfortran.h works])])])
+       [Defined to 1 if C / Fortran interface cfortran.h works])],
+    [AS_CASE([x"$acx_cv_cfortran_works"],
+       [x"error"],
+       [AC_MSG_NOTICE([Linking/Running with C EXTERNAL built with cfortran.h does not work!])],
+       [x"compiling with cfortran.h failed"],
+       [AC_MSG_NOTICE([Compilation with cfortran.h is not working!])],
+       [x"error compiling Fortran subroutine"],
+       [AC_MSG_NOTICE([compilation of simple Fortran source failed!])],
+       [AC_MSG_NOTICE([Unexpected error when linking C and Fortran via cfortran.h!])])
+     AC_MSG_NOTICE([Disabling cfortran.h bindings generation])
+     acx_cv_cfortran_works=no])])
 AM_CONDITIONAL([USE_FC],[test -n "$FC" -a X"$FC" != Xno -a x"$acx_cv_cfortran_works" = xyes])dnl
 dnl
 AC_SUBST([CPPFLAGS])dnl