expect: build for cygwin

I'm not quite sure about the config.guess/sub removals,
but the autotools and build output are the same without them.

expect/PKGBUILD

@@ -4,7 +4,7 @@
 
 pkgname=expect
 pkgver=5.45.4
-pkgrel=5
+pkgrel=6
 pkgdesc="A tool for automating interactive applications"
 arch=('i686' 'x86_64')
 url="https://www.nist.gov/el/msid/expect.cfm"
@@ -15,28 +15,22 @@ license=('custom')
 depends=('tcl')
 makedepends=('autotools' 'gcc' 'tcl-devel')
 source=(https://downloads.sourceforge.net/project/expect/Expect/${pkgver}/expect${pkgver}.tar.gz
-        config.guess
-        config.sub
-        5.45-openpty.patch
-        5.45-msysize.patch)
+        5.45-openpty.patch)
 sha256sums=('49a7da83b0bdd9f46d04a04deec19c7767bb9a323e40c4781f89caf760b92c34'
-            '5744cab7fda627ef53dbd0d8cb1fa08b30d3702e01a621e028c5a12deee7c21c'
-            '6ef568e79ee95214ecb8b187bf14f168bd0889575e922e5e866c455186cfb063'
-            '51767a9781b8844280265b290ac894fda176b7b92dad9b868f07b4e83b478207'
-            '4f0bd47194289969877b5c75f72e99db8120c430a063c99b1465179ac8cbb7b4')
+            '51767a9781b8844280265b290ac894fda176b7b92dad9b868f07b4e83b478207')
 
 prepare() {
   cd ${srcdir}/expect${pkgver}
   patch -p2 -i ${srcdir}/5.45-openpty.patch
-  patch -p1 -i ${srcdir}/5.45-msysize.patch
-  cp ${srcdir}/config.guess tclconfig/config.guess
-  cp ${srcdir}/config.sub   tclconfig/config.sub
+
   autoreconf -vfi
 }
 
 build() {
   cd ${srcdir}/expect${pkgver}
-  ./configure --prefix=/usr --mandir=/usr/share/man 
+  export MSYSTEM=CYGWIN
+  local CYGWIN_CHOST="${CHOST/-msys/-cygwin}"
+  ./configure --build=${CYGWIN_CHOST} --prefix=/usr --mandir=/usr/share/man 
   make SHLIB_LD='$(CC) -shared -Wl,--out-implib,[email protected]'
 }