From d5aef6e845ed72584aba3a129268d40a9694b568 Mon Sep 17 00:00:00 2001
From: Alessandro De Blasis <alex@deblasis.net>
Date: Tue, 24 Mar 2026 08:08:29 +0100
Subject: [PATCH] build: fix freetype compilation on Windows with MSVC

Gate HAVE_UNISTD_H and HAVE_FCNTL_H behind a non-Windows check since
these headers do not exist with MSVC. Freetype includes zlib headers
which conditionally include unistd.h based on this define.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
---
 pkg/freetype/build.zig | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/pkg/freetype/build.zig b/pkg/freetype/build.zig
index ecb22cb6c..b85310a5b 100644
--- a/pkg/freetype/build.zig
+++ b/pkg/freetype/build.zig
@@ -84,11 +84,14 @@ fn buildLib(b: *std.Build, module: *std.Build.Module, options: anytype) !*std.Bu
 
         "-DFT_CONFIG_OPTION_SYSTEM_ZLIB=1",
 
-        "-DHAVE_UNISTD_H",
-        "-DHAVE_FCNTL_H",
-
         "-fno-sanitize=undefined",
     });
+    if (target.result.os.tag != .windows) {
+        try flags.appendSlice(b.allocator, &.{
+            "-DHAVE_UNISTD_H",
+            "-DHAVE_FCNTL_H",
+        });
+    }
 
     if (target.result.os.tag == .freebsd or target.result.abi == .musl) {
         try flags.append(b.allocator, "-fPIC");