zig: 0.10 fix macOS build

Relevant upstream issue: ziglang/zig#14559

The patch is a backport of fixes that landed in zig-master and can
be removed with zig-0.11 release.

Additionally, make sure we link statically against LLVM to avoid
unpleasant runtime surprises originating from mixing static and
dynamic LLVM libraries.

Finally, unbreak Zig 0.10.1 on macOS.

pkgs/development/compilers/zig/0.10.nix

@@ -35,6 +35,12 @@ stdenv.mkDerivation rec {
     llvm
   ]);
 
+  patches = [
+    # Backport alignment related panics from zig-master to 0.10.
+    # Upstream issue: https://github.com/ziglang/zig/issues/14559
+    ./zig_14559.patch
+  ];
+
   preBuild = ''
     export HOME=$TMPDIR;
   '';
@@ -49,6 +55,9 @@ stdenv.mkDerivation rec {
     # file RPATH_CHANGE could not write new RPATH
     "-DCMAKE_SKIP_BUILD_RPATH=ON"
 
+    # always link against static build of LLVM
+    "-DZIG_STATIC_LLVM=ON"
+
     # ensure determinism in the compiler build
     "-DZIG_TARGET_MCPU=baseline"
   ];
@@ -75,9 +84,5 @@ stdenv.mkDerivation rec {
     license = licenses.mit;
     maintainers = with maintainers; [ aiotter andrewrk AndersonTorres ];
     platforms = platforms.unix;
-    # Build fails on Darwin on both AArch64 and x86_64:
-    # https://github.com/NixOS/nixpkgs/pull/210324#issuecomment-1381313616
-    # https://github.com/NixOS/nixpkgs/pull/210324#issuecomment-1381236045
-    broken = stdenv.isDarwin;
   };
 }