tmate: build for cygwin

tmate/PKGBUILD

@@ -1,6 +1,6 @@
 pkgname=tmate
 pkgver=2.4.0
-pkgrel=4
+pkgrel=5
 pkgdesc="Instant Terminal Sharing http://tmate.io/"
 arch=('i686' 'x86_64')
 license=('ISC')
@@ -14,14 +14,12 @@ makedepends=('libevent-devel' 'ncurses-devel' 'openssl-devel' 'libssh-devel' 'zl
 
 source=("$pkgname"::"git+https://github.com/tmate-io/tmate.git#tag=$pkgver"
         "0001-tmux-Inherit-MSYSTEM-variable.patch"
-        "0002-configure-handle-MSYS2.patch"
         "0003-do-not-check-directory-permissions.patch"
         "0004-Avoid-unsupported-GCC-option.patch"
         "0005-Try-to-side-step-libevent-for-DNS-resolution.patch"
         "msgpack-v6.patch")
 sha256sums=('9196af6e5e48c23df9e3846f7aab1e48a40d27ba19a22b9064bdb4b89bfdcf65'
             '1914efec5861967a9a4e024cde82fbc758b414f450f952814d1ff861605e41fe'
-            'b3e80c90cd0473f12bd5ed1f7d725c36fc97f0617bd79438cd377ec55509ce71'
             'f85d637de622440e14208f4a45f33a5ecc98f84ce5d678b8e2d3169d724ddf6b'
             'b2d916cb542cdd6e70f4864c8eda4fcf2d16c3d3573990f3fa3b3e2200c74a5f'
             'c60a65e8a2dfc37fb58d661cfeb211dc529bef7a89dc09198e1da9d0e0faecac'
@@ -31,17 +29,18 @@ prepare() {
   cd ${srcdir}/$pkgname
   patch -p1 -i ${srcdir}/msgpack-v6.patch
   patch -p1 -i ${srcdir}/0001-tmux-Inherit-MSYSTEM-variable.patch
-  patch -p1 -i ${srcdir}/0002-configure-handle-MSYS2.patch
   patch -p1 -i ${srcdir}/0003-do-not-check-directory-permissions.patch
   patch -p1 -i ${srcdir}/0004-Avoid-unsupported-GCC-option.patch
   patch -p1 -i ${srcdir}/0005-Try-to-side-step-libevent-for-DNS-resolution.patch
-  test -f osdep-msys.c || cp osdep-cygwin.c osdep-msys.c
   ./autogen.sh
 }
 
 build() {
   cd ${srcdir}/$pkgname
+
+  local CYGWIN_CHOST="${CHOST/-msys/-cygwin}"
   ./configure \
+    --build=${CYGWIN_CHOST} \
     --prefix=/usr \
     --sysconfdir=/etc \
     --localstatedir=/var \