From 4342689729bd3ea70209604b34af0a7c641b80cc Mon Sep 17 00:00:00 2001
From: Gerhard Sittig <gerhard.sittig@gmx.net>
Date: Sat, 22 Feb 2020 06:09:35 +0100
Subject: configure: add AC_C_CONST to configure.ac

This is inspired by the autobook sections on Windows DLL builds.
https://www.sourceware.org/autobook/autobook/autobook_137.html

The AC_C_CONST macro improves support for the C language 'const'
decoration in case the compiler does not understand it.
---
 configure.ac | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/configure.ac b/configure.ac
index d59e0be..3a8b163 100644
--- a/configure.ac
+++ b/configure.ac
@@ -40,6 +40,8 @@ AC_PROG_CC
 AC_PROG_INSTALL
 AC_PROG_LN_S
 
+AC_C_CONST
+
 # Required for per-target flags or subdir-objects with C sources.
 AM_PROG_CC_C_O
 
-- 
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