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dnl GHC_ADJUSTORS_METHOD(Platform)
dnl --------------------------------------------------------------
dnl Use libffi for adjustors?
AC_DEFUN([GHC_ADJUSTORS_METHOD],
[
case [$]{$1[Arch]} in
i386|x86_64)
# We have native adjustor support on these platforms
HaveNativeAdjustor=yes
;;
*)
HaveNativeAdjustor=no
;;
esac
AC_ARG_ENABLE(libffi-adjustors,
[AS_HELP_STRING(
[--enable-libffi-adjustors],
[Force use of libffi for adjustors, even on platforms which have support for more efficient, native adjustors.])],
UseLibffiForAdjustors=$enableval,
dnl do nothing
)
AC_MSG_CHECKING([whether to use libffi for adjustors])
if test "$UseLibffiForAdjustors" = "yes" ; then
# Use libffi is the user explicitly requested it
AdjustorType="libffi"
elif test "$HaveNativeAdjustor" = "yes"; then
# Otherwise if we have a native adjustor implementation use that
AdjustorType="native"
else
# If we don't have a native adjustor implementation then default to libffi
AdjustorType="libffi"
fi
case "$AdjustorType" in
libffi)
UseLibffiForAdjustors=YES
AC_MSG_RESULT([yes])
;;
native)
UseLibffiForAdjustors=NO
AC_MSG_RESULT([no])
;;
*)
AC_MSG_ERROR([Internal error: Invalid AdjustorType])
exit 1
esac
])