From 1407a818f056ce706c4b1d5242dbc115f8cc1653 Mon Sep 17 00:00:00 2001
From: Simonas Kazlauskas <git@kazlauskas.me>
Date: Thu, 23 Feb 2023 21:48:51 +0200
Subject: [PATCH] Fix jdk cross-compilation

---
 flake.nix |  4 ++--
 jdk.nix   | 18 ++++++++++++++++++
 2 files changed, 20 insertions(+), 2 deletions(-)
 create mode 100644 jdk.nix

diff --git a/flake.nix b/flake.nix
index 324048c..c1ba270 100644
--- a/flake.nix
+++ b/flake.nix
@@ -7,8 +7,8 @@
     outputs = { flake-utils, nixpkgs, ... }:
     let
         overlay = final: prev: rec {
-            jdk-openhab = final.jdk11;
-            openhab = final.callPackage ./openhab.nix { inherit jdk-openhab; };
+            jdk-openhab = final.callPackage ./jdk.nix {};
+            openhab = final.callPackage ./openhab.nix { };
             openhab-addons = final.callPackage ./openhab-addons.nix {};
         };
         pkgs = system: import nixpkgs { inherit system; overlays = [ overlay ]; };
diff --git a/jdk.nix b/jdk.nix
new file mode 100644
index 0000000..d4d4126
--- /dev/null
+++ b/jdk.nix
@@ -0,0 +1,18 @@
+{ buildPlatform, hostPlatform, jdk11, which, zip, buildPackages }:
+
+if buildPlatform == hostPlatform
+then jdk11
+else (jdk11.override {
+    # libIDL does not compile in cross-compile scenarios.
+    enableGnome2 = false;
+}).overrideAttrs (old: {
+    # lol, nixpkgs can’t get pkgs right
+    # AUTOCONF = "${autoconf}/bin/autoconf";
+    nativeBuildInputs = old.nativeBuildInputs ++ [ which zip ];
+    depsBuildBuild = with buildPackages; [ stdenv.cc autoconf ];
+    configureFlags = old.configureFlags ++ [
+        "--with-jtreg=no"
+        "--disable-hotspot-gtest"
+        "--with-build-jdk=${buildPackages.jdk11}"
+    ];
+})