Add deadbeef patches

Author: angerman

overlays/bootstrap.nix

@@ -281,6 +281,7 @@ in {
                 # Allow loading static external plugins into cross compilers
                 ++ final.lib.optional (versionAtLeast "9.6.1"  && versionLessThan"9.10" && (final.stdenv.targetPlatform != final.stdenv.hostPlatform)) ./patches/ghc/5c80a27488acfe3610ddfcb99a1e961002e386d0.patch
                 ++ final.lib.optional (versionAtLeast "9.6.1"  && versionLessThan"9.10" && (final.stdenv.targetPlatform != final.stdenv.hostPlatform)) ./patches/ghc/f8beb54a1d5725bd0d8a4b0a909d1b41d742b50b.patch
+                ++ final.lib.optional (versionAtLeast "9.6"    && versionLessThan "9.9" && (final.stdenv.targetPlatform.isAndroid && final.stdenv.targetPlatform.is32bit || final.stdenv.targetPlatform.isMusl)) ./patches/ghc/ghc-9.6-missing-symbols-deadbeef.patch
                 # These two patches are needed for libblst, which has now hidden symbols, which the linker doesn't know how to deal with.
                 ++ final.lib.optional (versionAtLeast "8.10"   && versionLessThan "8.11") ./patches/ghc/ghc-8.10-0006-Adds-support-for-Hidden-symbols.patch
                 ++ final.lib.optional (versionAtLeast "8.10"   && versionLessThan "8.11") ./patches/ghc/ghc-8.10-0006-Adds-support-for-Hidden-symbols-2.patch

overlays/patches/ghc/ghc-9.6-missing-symbols-deadbeef.patch

@@ -0,0 +1,26 @@
+diff --git a/rts/linker/elf_got.c b/rts/linker/elf_got.c
+index 4d0c978..96a9d60 100644
+--- a/rts/linker/elf_got.c
++++ b/rts/linker/elf_got.c
+@@ -99,7 +99,8 @@ fillGot(ObjectCode * oc) {
+                             } else {
+                                 errorBelch("Failed to lookup symbol: %s\n",
+                                            symbol->name);
+-                                return EXIT_FAILURE;
++                                // return EXIT_FAILURE;
++                                symbol->addr = 0xDEADBEEF;
+                             }
+                         }
+                     } else {
+diff --git a/rts/Linker.c b/rts/Linker.c
+index 2356818..727e845 100644
+--- a/rts/Linker.c
++++ b/rts/Linker.c
+@@ -1088,6 +1088,7 @@ SymbolAddr* lookupSymbol( SymbolName* lbl )
+                    "See top entry above.\n", lbl);
+         IF_DEBUG(linker, printLoadedObjects());
+         fflush(stderr);
++        r = 0xDEADBEEF;
+     }
+
+     if (!runPendingInitializers()) {