diff -Nur meep-1.2.orig/configure.ac meep-1.2/configure.ac --- meep-1.2.orig/configure.ac 2012-08-14 21:52:13.000000000 +0100 +++ meep-1.2/configure.ac 2012-08-14 22:00:55.000000000 +0100 @@ -161,8 +161,10 @@ ########################################################################### # MPB library - -AC_CHECK_HEADER(mpb.h, [have_mpb=maybe], [have_mpb=no]) +AC_ARG_WITH(mpb, [AC_HELP_STRING([--without-mpb],[do not build with mpb])], ok=$withval, ok=yes) +if test "$ok" = "yes"; then + AC_CHECK_HEADER(mpb.h, [have_mpb=maybe], [have_mpb=no]) +fi if test $have_mpb = maybe; then if test "x$acx_lapack_ok" = x -a "$have_harminv" = xno; then