diff --git a/configure.ac b/configure.ac index 9eca253560b62991e040e81b3be438a02d8afda6..5ad10e87265ad5f00031ca4c87303808adb8c622 100644 --- a/configure.ac +++ b/configure.ac @@ -444,6 +444,10 @@ if test "x$with_gsl" != "xno"; then AC_MSG_ERROR(something is wrong with the GSL library!), $GSL_LIBS) have_gsl="yes" fi + if test "$have_gsl" = "no"; then + GSL_LIBS="" + GSL_INCS="" + fi fi AC_SUBST([GSL_LIBS]) AC_SUBST([GSL_INCS]) @@ -574,6 +578,10 @@ if test "x$with_fftw" != "xno"; then AC_MSG_ERROR(something is wrong with the FFTW library!), $FFTW_LIBS) have_fftw="yes" fi + if test "$have_fftw" = "no"; then + FFTW_LIBS="" + FFTW_INCS="" + fi fi AC_SUBST([FFTW_LIBS]) AC_SUBST([FFTW_INCS])