AC_ARG_ENABLE(supernovae,
AS_HELP_STRING([--enable-supernovae],[Put the whole library in one compilation unit only to help gcc optimizing the code]),
[supernovae=$enableval],
AC_ARG_ENABLE(supernovae,
AS_HELP_STRING([--enable-supernovae],[Put the whole library in one compilation unit only to help gcc optimizing the code]),
[supernovae=$enableval],