From 605184768dd2605049b8e927449790ac2e1339c3 Mon Sep 17 00:00:00 2001
From: ghpzin <ghpzin@gmail.com>
Date: Mon, 22 Dec 2025 17:05:21 +0300
Subject: [PATCH] liblqr1: fix build on darwin

- change `env.NIX_CFLAGS_COMPILE = "-std=gnu17"` to only apply to gcc

Fixes build failure with clangStdenv and darwin:
```
checking how to run the C++ preprocessor... /lib/cpp
configure: error: in `/build/source':
configure: error: C++ preprocessor "/lib/cpp" fails sanity check
See `config.log' for more details
...
configure:4591: clang++ -c   conftest.cpp >&5
error: invalid argument '-std=gnu17' not allowed with 'C++'
```
---
 pkgs/by-name/li/liblqr1/package.nix | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/pkgs/by-name/li/liblqr1/package.nix b/pkgs/by-name/li/liblqr1/package.nix
index b6737fb2306f..337381f04d71 100644
--- a/pkgs/by-name/li/liblqr1/package.nix
+++ b/pkgs/by-name/li/liblqr1/package.nix
@@ -23,7 +23,9 @@ stdenv.mkDerivation (finalAttrs: {
   };
 
   # Fix build with gcc15
-  env.NIX_CFLAGS_COMPILE = "-std=gnu17";
+  env = lib.optionalAttrs stdenv.cc.isGNU {
+    NIX_CFLAGS_COMPILE = "-std=gnu17";
+  };
 
   nativeBuildInputs = [ pkg-config ];
   propagatedBuildInputs = [ glib ];