From 2ab66546720c3fb60678b365ed5be5474a1e2cad Mon Sep 17 00:00:00 2001
From: K900 <me@0upti.me>
Date: Thu, 1 Aug 2024 17:20:33 +0300
Subject: [PATCH] prusa-slicer: build with clang

See comment for why.
---
 pkgs/applications/misc/prusa-slicer/default.nix | 3 +++
 pkgs/top-level/all-packages.nix                 | 5 ++++-
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/pkgs/applications/misc/prusa-slicer/default.nix b/pkgs/applications/misc/prusa-slicer/default.nix
index 96fc551595b5..a9d78e9884e1 100644
--- a/pkgs/applications/misc/prusa-slicer/default.nix
+++ b/pkgs/applications/misc/prusa-slicer/default.nix
@@ -128,6 +128,9 @@ stdenv.mkDerivation (finalAttrs: {
   # prusa-slicer uses dlopen on `libudev.so` at runtime
   NIX_LDFLAGS = lib.optionalString withSystemd "-ludev";
 
+  # FIXME: remove in 2.8.0
+  NIX_CFLAGS_COMPILE = "-Wno-enum-constexpr-conversion";
+
   prePatch = ''
     # Since version 2.5.0 of nlopt we need to link to libnlopt, as libnlopt_cxx
     # now seems to be integrated into the main lib.
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 9a10324e004e..736492f80f44 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -33835,7 +33835,10 @@ with pkgs;
   printrun = callPackage ../applications/misc/printrun { };
 
   prusa-slicer = darwin.apple_sdk_11_0.callPackage ../applications/misc/prusa-slicer {
-    stdenv = if stdenv.isDarwin then overrideSDK llvmPackages_14.stdenv "11.0" else stdenv;
+    # Build with clang even on Linux, because GCC uses absolutely obscene amounts of memory
+    # on this particular code base (OOM with 32GB memory and --cores 16 on GCC, succeeds
+    # with --cores 32 on clang).
+    stdenv = if stdenv.isDarwin then overrideSDK llvmPackages.stdenv "11.0" else llvmPackages.stdenv;
   };
 
   super-slicer = darwin.apple_sdk_11_0.callPackage ../applications/misc/prusa-slicer/super-slicer.nix { };