$NetBSD: patch-rts_rts.cabal.in,v 1.1 2023/01/21 04:49:25 pho Exp $

Don't assume we always build the threaded RTS. Not upstreamed yet.

--- rts/rts.cabal.in.orig	2023-01-11 05:03:17.728266721 +0000
+++ rts/rts.cabal.in
@@ -45,6 +45,8 @@ flag find-ptr
 -- threaded. The flags "compose": if you enable debug and profiling,
 -- you will produce vanilla, _thr, _debug, _p but also _thr_p,
 -- _thr_debug_p and so on.
+flag threaded
+  default: False
 flag profiling
   default: False
 flag debug
@@ -84,18 +86,26 @@ library
     -- this cabal file. We therefore declare several
     -- flavours to be available when passing the suitable (combination of)
     -- flag(s) when configuring the RTS from hadrian, using Cabal.
-    extra-library-flavours: _thr
-
+    if flag(threaded)
+      extra-library-flavours: _thr
+      if flag(dynamic)
+        extra-dynamic-library-flavours: _thr
     if flag(profiling)
-      extra-library-flavours: _p _thr_p
+      extra-library-flavours: _p
+      if flag(threaded)
+        extra-library-flavours: _thr_p
       if flag(debug)
-        extra-library-flavours: _debug_p _thr_debug_p
+        extra-library-flavours: _debug_p
+        if flag(threaded)
+          extra-library-flavours: _thr_debug_p
     if flag(debug)
-      extra-library-flavours: _debug _thr_debug
+      extra-library-flavours: _debug
+      if flag(threaded)
+        extra-library-flavours: _thr_debug
       if flag(dynamic)
-        extra-dynamic-library-flavours: _debug _thr_debug
-    if flag(dynamic)
-      extra-dynamic-library-flavours: _thr
+        extra-dynamic-library-flavours: _debug
+        if flag(threaded)
+          extra-dynamic-library-flavours: _thr_debug
 
     if flag(thread-sanitizer)
       cc-options: -fsanitize=thread