From c7659332cb3aae43cde1cf3e18fe7f44a42cd585 Mon Sep 17 00:00:00 2001
From: Joel Rosdahl <joel@rosdahl.net>
Date: Wed, 2 Sep 2020 09:51:54 +0200
Subject: [PATCH] Set _FILE_OFFSET_BITS to 64

This allows for operating on large files when compiled in 32-bit mode.

Fixes #649.
---
 cmake/config.h.in | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/cmake/config.h.in b/cmake/config.h.in
index 9e764223d6..e264cfba48 100644
--- a/cmake/config.h.in
+++ b/cmake/config.h.in
@@ -42,6 +42,11 @@
 #  define _XOPEN_SOURCE_EXTENDED
 #endif
 
+// Handle large files when compiled in 32-bit mode.
+#ifndef _FILE_OFFSET_BITS
+#  define _FILE_OFFSET_BITS 64
+#endif
+
 // clang-format off
 #cmakedefine _WIN32_WINNT @_WIN32_WINNT@
 // clang-format on