From dc9f09f3bd9dc53433d439bc2b5f2ac75399733d Mon Sep 17 00:00:00 2001
From: Martin Pulec <martin.pulec@cesnet.cz>
Date: Mon, 11 Aug 2025 15:22:12 +0200
Subject: [PATCH] configure.ac: accept also cygwin as Windows

The variable #MSYSTEM_CHOST is taken as the base (/etc/config.site) and
contains now in MSYS x86_64-pc-cygwin resulting in $host_os=cygwin. Not
sure where the variable is defined, anyways...
---
 configure.ac | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/configure.ac b/configure.ac
index bf74f8b0e..93189e0dc 100644
--- a/configure.ac
+++ b/configure.ac
@@ -126,7 +126,7 @@ if test "$host_vendor" = "apple"; then
 	AC_DEFINE([HAVE_MACOSX], [1], [This is Mac X OS])
         APPEXT=.app
 elif expr "x$host_os" : "x.*mingw32.*" > /dev/null ||
-expr "x$host_os" : "x.*msys.*" > /dev/null; then
+  expr "x$host_os" : "x.*msys.*" > /dev/null || test "$host_os" = cygwin; then
         system=Windows
         APPEXT=.exe
 	AC_DEFINE([WIN32], [1], [This is an Windows OS])