From f27a434274687b6cb56b3418e2474f37f2be0e8d Mon Sep 17 00:00:00 2001
From: Viktor Sonesten <v@tmplt.dev>
Date: Mon, 5 May 2025 13:58:18 +0200
Subject: [PATCH] fmi-reference-fmus: init at 0.0.38

---
 .../by-name/fm/fmi-reference-fmus/package.nix | 47 +++++++++++++++++++
 1 file changed, 47 insertions(+)
 create mode 100644 pkgs/by-name/fm/fmi-reference-fmus/package.nix

diff --git a/pkgs/by-name/fm/fmi-reference-fmus/package.nix b/pkgs/by-name/fm/fmi-reference-fmus/package.nix
new file mode 100644
index 000000000000..e41e1223d8b9
--- /dev/null
+++ b/pkgs/by-name/fm/fmi-reference-fmus/package.nix
@@ -0,0 +1,47 @@
+{
+  lib,
+  stdenv,
+  fetchFromGitHub,
+  cmake,
+
+  # Build the FMUs following the latest FMI standard
+  FMIVersion ? 3,
+}:
+
+# C.f. <https://fmi-standard.org/>
+assert lib.asserts.assertMsg (
+  FMIVersion >= 1 && FMIVersion <= 3
+) "FMIVersion must be a valid FMI specification standard: 1, 2, or 3; not ${toString FMIVersion}";
+
+# NB: this derivation does not package the fmusim executables, only
+# the FMUs.
+stdenv.mkDerivation (finalAttrs: {
+  pname = "reference-fmus";
+  version = "0.0.38";
+  src = fetchFromGitHub {
+    owner = "modelica";
+    repo = finalAttrs.pname;
+    rev = "v${finalAttrs.version}";
+    hash = "sha256-FeDKYcm9K670q1FGqy41Tp2Ag8p2JidH4z78zpHOngw=";
+  };
+
+  nativeBuildInputs = [ cmake ];
+
+  cmakeFlags = [
+    "-DFMI_VERSION=${toString FMIVersion}"
+    (lib.cmakeBool "WITH_FMUSIM" false)
+  ];
+  CFLAGS = lib.optionalString (FMIVersion == 3) "-Wno-stringop-truncation";
+
+  meta = {
+    # CMakeLists.txt explicitly states support for aarch64-darwin, but
+    # the build fails in a Nix environment. C.f.
+    # <https://github.com/NixOS/nixpkgs/pull/397658#issuecomment-2851958172>.
+    broken = with stdenv.hostPlatform; isAarch64 && isDarwin;
+    description = "Functional Mock-up Units for development, testing and debugging";
+    homepage = "https://github.com/modelica/Reference-FMUs";
+    license = lib.licenses.bsd2;
+    maintainers = with lib.maintainers; [ tmplt ];
+    platforms = lib.platforms.all;
+  };
+})