CHG: added check to tell useers they cannot use both PETSc and CoDiPack

m4/issm_options.m4

@@ -2510,6 +2510,9 @@ AC_DEFUN([ISSM_OPTIONS],[
 	dnl Check that if we run ADOL-C, we don't use PETSc for now
 	if test "x${HAVE_ADOLC}" == "xyes" && test "x${HAVE_PETSC}" == "xyes"; then
 		AC_MSG_ERROR([cannot compile ISSM with both PETSc and ADOL-C!]);
+	fi
+	  if test "x${HAVE_PETSC}" == "xyes" && test "x${HAVE_CODIPACK}" == "xyes"; then
+		AC_MSG_ERROR([cannot compile ISSM with both PETSc and CoDiPack]);
 	fi
 	if test "x${HAVE_ADOLC}" == "xyes" && test "x${HAVE_CODIPACK}" == "xyes"; then
 		AC_MSG_ERROR([cannot compile ISSM with both ADOL-C and CoDiPack!]);