Consolidated patch of previously merged CYGWIN support

The combined results of merge request #49 without that
overhead plus distortion in this repository's history.

Prototyped-by: Wayne Porter <wporter82@gmail.com>

configure.ac

@@ -69,6 +69,27 @@ AC_FUNC_MMAP
 AC_FUNC_REALLOC
 AC_FUNC_STRTOD
 
+usrbin_execdir='${exec_prefix}/bin'
+AC_SUBST([usrbin_execdir])
+
+if test "x$host_os" = xcygwin
+then
+  prefix=/usr
+  sysconfdir=/etc
+  libexecdir=/usr/lib
+  localstatedir=/var
+  datadir=/usr/share
+  mandir=/usr/share/man
+  infodir=/usr/share/info
+  AC_SUBST([prefix])
+  AC_SUBST([sysconfdir])
+  AC_SUBST([libexecdir])
+  AC_SUBST([localstatedir])
+  AC_SUBST([datadir])
+  AC_SUBST([mandir])
+  AC_SUBST([infodir])
+fi
+
 AM_GNU_GETTEXT_VERSION([0.14.1])
 AM_GNU_GETTEXT([external])
 if test -d "$srcdir/po"