From: Jan-Simon Moeller <jsmoeller@linuxfoundation.org>
Date: Fri, 29 May 2026 00:00:00 +0000
Subject: [PATCH] zlib: add missing <unistd.h> include in gzguts.h

GCC 14 makes -Wimplicit-function-declaration an error in C99+ mode.
The bundled zlib uses lseek() in gzlib.c without including <unistd.h>
(where lseek is declared), causing a build failure on newer hosts.

Upstream-Status: Inappropriate [version-specific bundled copy]
Signed-off-by: Jan-Simon Moeller <jsmoeller@linuxfoundation.org>
---
 third_party/zlib/gzguts.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/third_party/zlib/gzguts.h b/third_party/zlib/gzguts.h
index 1111111..2222222 100644
--- a/third_party/zlib/gzguts.h
+++ b/third_party/zlib/gzguts.h
@@ -19,6 +19,7 @@
 #endif

 #include <stdio.h>
+#include <unistd.h>
 #include "zlib.h"
 #ifdef STDC
 #  include <string.h>