revert ineffective b04ac8a017b2: etc/settings of polyml components needs to be changed as well;
--- a/NEWS Tue Jul 11 17:07:10 2023 +0200
+++ b/NEWS Tue Jul 11 18:30:56 2023 +0200
@@ -461,10 +461,6 @@
* Update to GHC stack 2.9.3 with support for arm64-linux.
-* System option "ML_system_apple" now defaults to "false", for more
-stability: Poly/ML for ARM64 is still somewhat unstable and not
-yet officially released.
-
New in Isabelle2022 (October 2022)
--- a/etc/options Tue Jul 11 17:07:10 2023 +0200
+++ b/etc/options Tue Jul 11 18:30:56 2023 +0200
@@ -177,7 +177,7 @@
public option ML_system_64 : bool = false for build
-- "prefer native 64bit platform (change requires restart)"
-public option ML_system_apple : bool = false for build
+public option ML_system_apple : bool = true for build
-- "prefer native Apple/ARM64 platform (change requires restart)"