From d933df8d01ddf3c6fdccd17039ec105fcfbd176d Mon Sep 17 00:00:00 2001
From: ghpzin <ghpzin@gmail.com>
Date: Tue, 7 Oct 2025 14:26:14 +0300
Subject: [PATCH] mupdf: fix build of vendored freeglut with gcc15

- add patch from `freeglut` upstream to vendored fork version:
https://www.github.com/freeglut/freeglut/pull/187

Fixes build failure with gcc15:
```
/build/source/src/x11/fg_init_x11.c:348:6: error: conflicting types for
'fgPlatformDestroyContext'; have 'void(SFG_PlatformDisplay,  struct __GLXcontextRec *)'
{aka 'void(struct tagSFG_PlatformDisplay,  struct __GLXcontextRec *)'}
  348 | void fgPlatformDestroyContext ( SFG_PlatformDisplay pDisplay, SFG_WindowContextType MContext )
      |      ^~~~~~~~~~~~~~~~~~~~~~~~
In file included from /build/source/src/x11/fg_init_x11.c:34:
/build/source/src/egl/fg_init_egl.h:31:13: note: previous declaration of
'fgPlatformDestroyContext' with type 'void(void)'
   31 | extern void fgPlatformDestroyContext();
      |             ^~~~~~~~~~~~~~~~~~~~~~~~
```
---
 pkgs/by-name/mu/mupdf/package.nix | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/pkgs/by-name/mu/mupdf/package.nix b/pkgs/by-name/mu/mupdf/package.nix
index cd1bea612afa..492322fd7f9b 100644
--- a/pkgs/by-name/mu/mupdf/package.nix
+++ b/pkgs/by-name/mu/mupdf/package.nix
@@ -55,7 +55,15 @@ let
       hash = "sha256-0fuE0lm9rlAaok2Qe0V1uUrgP4AjMWgp3eTbw8G6PMM=";
     };
 
-    patches = [ ];
+    patches = [
+      # Fix build with gcc15
+      # https://github.com/freeglut/freeglut/pull/187
+      (fetchpatch {
+        name = "freeglut-fix-fgPlatformDestroyContext-prototype-for-C23.patch";
+        url = "https://github.com/freeglut/freeglut/commit/800772e993a3ceffa01ccf3fca449d3279cde338.patch";
+        hash = "sha256-agXw3JHq81tx5514kkorvuU5mX4E3AV930hy1OJl4L0=";
+      })
+    ];
 
     # cmake 4 compatibility, upstream is dead
     postPatch = ''