From f7d6b178759083890234a83f0ab539f676a8ca6f Mon Sep 17 00:00:00 2001
From: Reno Dakota <paparodeo@proton.me>
Date: Tue, 31 Dec 2024 03:17:50 -0800
Subject: [PATCH] libossp_uuid: remove invalid ac_cv_va_copy value

use `ac_cv_va_copy=C99` rather than the invalid value of `yes`

Change 5c7cfbc0f11e360f50467b20a407c675c976d3a0 set ac_cv_va_copy=yes
which results in
```
```
and there is no definition for __VA_COPY_USE_yes, it needs to be
__VA_COPY_USE_{ASP,...,C99,...,GCM}.

While __VA_COPY_USE_yes is wrong it didn't cause issues because
stdarg.h is included later and just redefines va_copy.

However, the headers with clang-19 do not redefine va_copy and the
compile fails.
---
 pkgs/by-name/li/libossp_uuid/package.nix | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pkgs/by-name/li/libossp_uuid/package.nix b/pkgs/by-name/li/libossp_uuid/package.nix
index a04339778f05..57078f4741eb 100644
--- a/pkgs/by-name/li/libossp_uuid/package.nix
+++ b/pkgs/by-name/li/libossp_uuid/package.nix
@@ -14,7 +14,7 @@ stdenv.mkDerivation rec {
   };
 
   configureFlags = [
-    "ac_cv_va_copy=yes"
+    "ac_cv_va_copy=C99"
   ] ++ lib.optional stdenv.hostPlatform.isFreeBSD "--with-pic";
 
   patches = [ ./shtool.patch ];