There's no need to check for dlopen on cygwin.
tree9427a1653974c5aa5aa41a1c87bd2d4bd183f6f8
-rw-r--r-- 78 .cvsignore
-rw-r--r-- 2202 ANNOUNCE
-rw-r--r-- 7518 AUTHORS
-rw-r--r-- 1151 BUGS
-rw-r--r-- 26428 COPYING.LIB
-rw-r--r-- 1767111 ChangeLog
-rw-r--r-- 20528 DEVELOPERS-HINTS
-rw-r--r-- 822 LICENSE
-rw-r--r-- 1324 LICENSE.OLD
-rw-r--r-- 8931 Make.rules.in
-rw-r--r-- 4399 Makefile.in
-rw-r--r-- 9446 README
-rw-r--r-- 22 VERSION
-rwxr-xr-x 400999 configure
-rw-r--r-- 41827 configure.ac
drwxr-xr-x - controls
drwxr-xr-x - debugger
drwxr-xr-x - dlls
drwxr-xr-x - documentation
drwxr-xr-x - files
drwxr-xr-x - graphics
drwxr-xr-x - if1632
drwxr-xr-x - include
drwxr-xr-x - library
drwxr-xr-x - libtest
drwxr-xr-x - loader
drwxr-xr-x - memory
drwxr-xr-x - misc
drwxr-xr-x - miscemu
drwxr-xr-x - msdos
drwxr-xr-x - objects
drwxr-xr-x - ole
drwxr-xr-x - programs
drwxr-xr-x - relay32
drwxr-xr-x - scheduler
drwxr-xr-x - server
drwxr-xr-x - tools
drwxr-xr-x - tsx11
drwxr-xr-x - unicode
drwxr-xr-x - win32
drwxr-xr-x - windows
-rw-r--r-- 12728 winedefault.reg