From 89666e7c37ebb17d9df6dfc176c6844d1540dfc0 Mon Sep 17 00:00:00 2001
From: "Todd C. Miller" <Todd.Miller@sudo.ws>
Date: Mon, 27 Jun 2022 13:02:13 -0600
Subject: [PATCH] Define _LFS64_LARGEFILE, _LARGEFILE64_SOURCE if 64-bit or
 _LARGE_FILES set. autoconf does not define _LARGEFILE64_SOURCE by default but
 zlib expects it (its own configure script will define it). Fixes a missing
 prototype for crc32_combine_gen64() on AIX and HP-UX.

---
 lib/zlib/zconf.h.in | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/lib/zlib/zconf.h.in b/lib/zlib/zconf.h.in
index 0b6bd5360..95cb5b818 100644
--- a/lib/zlib/zconf.h.in
+++ b/lib/zlib/zconf.h.in
@@ -18,6 +18,19 @@
 #undef _LARGE_FILES
 #undef const
 
+/*
+ * Configure does not define _LARGEFILE64_SOURCE by default.
+ * We need to manually define it on AIX and native 64-bit platforms.
+ */
+#if defined (_LARGE_FILES) || defined (__LP64__)
+# ifndef _LFS64_LARGEFILE
+#  define _LFS64_LARGEFILE 1
+# endif
+# ifndef _LARGEFILE64_SOURCE
+#  define _LARGEFILE64_SOURCE 1
+# endif
+#endif
+
 /* We build sudo and its libs with -fvisibility=hidden where supported. */
 #ifdef HAVE_DSO_VISIBILITY
 # if defined(__GNUC__)