Index: /issm/trunk-jpl/m4/issm_options.m4
===================================================================
--- /issm/trunk-jpl/m4/issm_options.m4	(revision 12219)
+++ /issm/trunk-jpl/m4/issm_options.m4	(revision 12220)
@@ -951,11 +951,17 @@
 
 	dnl check that --with-fortran-lib may have been provided
+	HAVE_FORTRAN=no
 	if test -n "$FORTRAN_LIB" ; then
-		HAVE_FORTRAN=yes
-		FORTRANLIB="$FORTRAN_LIB"
-
-		AC_DEFINE([_HAVE_FORTRAN_],[1],[with FORTRAN in ISSM src])
-		AC_SUBST([FORTRANLIB])
-	fi
+        if test x$FORTRAN_LIB = xno; then
+            HAVE_FORTRAN=NO
+        else
+            HAVE_FORTRAN=yes
+            FORTRANLIB="$FORTRAN_LIB"
+
+            AC_DEFINE([_HAVE_FORTRAN_],[1],[with FORTRAN in ISSM src])
+            AC_SUBST([FORTRANLIB])
+        fi
+	fi
+	AM_CONDITIONAL([FORTRAN], [test x$HAVE_FORTRAN = xyes])
 	AC_MSG_RESULT(done)
 	dnl }}}