wezterm: patch vendored deps for clang 19

pkgs/applications/terminal-emulators/wezterm/default.nix

@@ -29,6 +29,7 @@
   nixosTests,
   runCommand,
   vulkan-loader,
+  fetchpatch2,
 }:
 
 rustPlatform.buildRustPackage rec {
@@ -43,6 +44,21 @@ rustPlatform.buildRustPackage rec {
     hash = "sha256-Az+HlnK/lRJpUSGm5UKyma1l2PaBKNCGFiaYnLECMX8=";
   };
 
+  patches = [
+    # Remove unused `fdopen` in vendored zlib, which causes compilation failures with clang 19 on Darwin.
+    # Ref: https://github.com/madler/zlib/commit/4bd9a71f3539b5ce47f0c67ab5e01f3196dc8ef9
+    ./zlib-fdopen.patch
+
+    # Fix platform check in vendored libpng with clang 19 on Darwin.
+    (fetchpatch2 {
+      url = "https://github.com/pnggroup/libpng/commit/893b8113f04d408cc6177c6de19c9889a48faa24.patch?full_index=1";
+      extraPrefix = "deps/freetype/libpng/";
+      stripLen = 1;
+      excludes = [ "deps/freetype/libpng/AUTHORS" ];
+      hash = "sha256-zW/oUo2EGcnsxAfbbbhTKGui/lwCqovyrvUnylfRQzc=";
+    })
+  ];
+
   postPatch = ''
     cp ${./Cargo.lock} Cargo.lock
 

pkgs/applications/terminal-emulators/wezterm/zlib-fdopen.patch

@@ -0,0 +1,24 @@
+Submodule deps/freetype/zlib contains modified content
+diff --git a/deps/freetype/zlib/zutil.h b/deps/freetype/zlib/zutil.h
+index b079ea6..4e94f2f 100644
+--- a/deps/freetype/zlib/zutil.h
++++ b/deps/freetype/zlib/zutil.h
+@@ -130,17 +130,8 @@ extern z_const char * const z_errmsg[10]; /* indexed by 2-zlib_error */
+ #  endif
+ #endif
+ 
+-#if defined(MACOS) || defined(TARGET_OS_MAC)
++#if defined(MACOS)
+ #  define OS_CODE  7
+-#  ifndef Z_SOLO
+-#    if defined(__MWERKS__) && __dest_os != __be_os && __dest_os != __win32_os
+-#      include <unix.h> /* for fdopen */
+-#    else
+-#      ifndef fdopen
+-#        define fdopen(fd,mode) NULL /* No fdopen() */
+-#      endif
+-#    endif
+-#  endif
+ #endif
+ 
+ #ifdef __acorn