From 7b1db8b2fb32ddf73f9c75436f25e92855b56ef3 Mon Sep 17 00:00:00 2001
From: teejusb <5017202+teejusb@users.noreply.github.com>
Date: Mon, 17 Jan 2022 14:59:34 -0800
Subject: [PATCH] Define ssize_t to be the same width of size_t

The size of size_t is defined by the architecture (32bit or 64bit). Since ssize_t is not part of the standard, unlike size_t, it might not be defined but it should always be the same size as size_t.
---
 src/config.in.hpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/config.in.hpp b/src/config.in.hpp
index 44be021359..ccbfc81dd7 100644
--- a/src/config.in.hpp
+++ b/src/config.in.hpp
@@ -120,7 +120,8 @@ typedef unsigned long size_t;
 /* Provide a fallback if ssize_t is not defined. */
 #cmakedefine HAVE_SIZEOF_SSIZE_T 1
 #if !defined(HAVE_SIZEOF_SSIZE_T)
-typedef long ssize_t;
+#include <type_traits>
+typedef std::make_signed<size_t>::type ssize_t;
 #endif
 
 /* Defined to 1 if the underlying system uses little endian. */