Factor out GHC_ADJUSTORS_METHOD m4 macro

1 files changed, 5 insertions, 48 deletions

diff --git a/configure.ac b/configure.ac
index 79e0de904b..33ed0751f1 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1261,56 +1261,13 @@ AC_DEFINE_UNQUOTED([RTS_LINKER_USE_MMAP], [$RtsLinkerUseMmap],
                    [Use mmap in the runtime linker])
 
 
-dnl ** Use libffi for adjustors?
-dnl --------------------------------------------------------------
-
-case ${TargetArch} in
-    i386|x86_64)
-        # We have native adjustor support on these platforms
-        HaveNativeAdjustor=yes
-        ;;
-    *)
-        HaveNativeAdjustor=no
-        ;;
-esac
-
-AC_ARG_ENABLE(libffi-adjustors,
-    [AS_HELP_STRING(
-        [--enable-libffi-adjustors],
-        [Force use of libffi for adjustors, even on platforms which have support for more efficient, native adjustors.])],
-    UseLibffiForAdjustors=$enableval,
-    dnl do nothing
+GHC_ADJUSTORS_METHOD([Target])
+AC_SUBST([UseLibffiForAdjustors])
+AS_IF([test x"${UseLibffiForAdjustors}" = x"YES"],
+  [CabalLibffiAdjustors=True],
+  [CabalLibffiAdjustors=False]
 )
-
-AC_MSG_CHECKING([whether to use libffi for adjustors])
-AC_MSG_RESULT([$UseLibffiForAdjustors])
-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)
-    CabalLibffiAdjustors=True
-    UseLibffiForAdjustors=YES
-    ;;
-native)
-    CabalLibffiAdjustors=False
-    UseLibffiForAdjustors=NO
-    ;;
-*)
-    AC_MSG_ERROR([Internal error: Invalid AdjustorType])
-    exit 1
-esac
-
 AC_SUBST([CabalLibffiAdjustors])
-AC_SUBST([UseLibffiForAdjustors])
 
 dnl ** Other RTS features
 dnl --------------------------------------------------------------