Installing python-ldap in cygwin took a while for me. When I tried to install with

easy_install python-ldap

I got this error

Searching for python-ldap
Reading http://pypi.python.org/simple/python-ldap/
Reading http://www.python-ldap.org/
Best match: python-ldap 2.4.10
Downloading http://pypi.python.org/packages/source/p/python-ldap/python-ldap-2.4.10.tar.gz#md5=a15827ca13c90e9101e5e9405c1d83be
Processing python-ldap-2.4.10.tar.gz
Running python-ldap-2.4.10/setup.py -q bdist_egg --dist-dir /tmp/easy_install-JXhRAd/python-ldap-2.4.10/egg-dist-tmp-1wRZxP
defines: HAVE_SASL HAVE_TLS HAVE_LIBLDAP_R
extra_compile_args:
extra_objects:
include_dirs: /opt/openldap-RE24/include /usr/include/sasl /usr/include
library_dirs: /opt/openldap-RE24/lib /usr/lib
libs: ldap_r
file Lib/ldap.py (for module ldap) not found
file Lib/ldap/controls.py (for module ldap.controls) not found
file Lib/ldap/extop.py (for module ldap.extop) not found
file Lib/ldap/schema.py (for module ldap.schema) not found
warning: no files found matching 'Makefile'
warning: no files found matching 'Modules/LICENSE'
file Lib/ldap.py (for module ldap) not found
file Lib/ldap/controls.py (for module ldap.controls) not found
file Lib/ldap/extop.py (for module ldap.extop) not found
file Lib/ldap/schema.py (for module ldap.schema) not found
file Lib/ldap.py (for module ldap) not found
file Lib/ldap/controls.py (for module ldap.controls) not found
file Lib/ldap/extop.py (for module ldap.extop) not found
file Lib/ldap/schema.py (for module ldap.schema) not found
build/temp.cygwin-1.7.17-i686-2.7/Modules/LDAPObject.o: In function `l_ldap_result4':
/tmp/easy_install-JXhRAd/python-ldap-2.4.10/Modules/LDAPObject.c:988: undefined reference to `_ber_bvfree'
build/temp.cygwin-1.7.17-i686-2.7/Modules/ldapcontrol.o: In function `encode_rfc3876':
/tmp/easy_install-JXhRAd/python-ldap-2.4.10/Modules/ldapcontrol.c:216: undefined reference to `_ber_alloc_t'
/tmp/easy_install-JXhRAd/python-ldap-2.4.10/Modules/ldapcontrol.c:227: undefined reference to `_ber_flatten'
/tmp/easy_install-JXhRAd/python-ldap-2.4.10/Modules/ldapcontrol.c:237: undefined reference to `_ber_free'
build/temp.cygwin-1.7.17-i686-2.7/Modules/ldapcontrol.o: In function `decode_rfc2696':
/tmp/easy_install-JXhRAd/python-ldap-2.4.10/Modules/ldapcontrol.c:315: undefined reference to `_ber_init'
/tmp/easy_install-JXhRAd/python-ldap-2.4.10/Modules/ldapcontrol.c:320: undefined reference to `_ber_scanf'
/tmp/easy_install-JXhRAd/python-ldap-2.4.10/Modules/ldapcontrol.c:330: undefined reference to `_ber_free'
build/temp.cygwin-1.7.17-i686-2.7/Modules/ldapcontrol.o: In function `encode_rfc2696':
/tmp/easy_install-JXhRAd/python-ldap-2.4.10/Modules/ldapcontrol.c:258: undefined reference to `_ber_alloc_t'
/tmp/easy_install-JXhRAd/python-ldap-2.4.10/Modules/ldapcontrol.c:263: undefined reference to `_ber_printf'
/tmp/easy_install-JXhRAd/python-ldap-2.4.10/Modules/ldapcontrol.c:272: undefined reference to `_ber_printf'
/tmp/easy_install-JXhRAd/python-ldap-2.4.10/Modules/ldapcontrol.c:278: undefined reference to `_ber_printf'
/tmp/easy_install-JXhRAd/python-ldap-2.4.10/Modules/ldapcontrol.c:284: undefined reference to `_ber_flatten'
/tmp/easy_install-JXhRAd/python-ldap-2.4.10/Modules/ldapcontrol.c:293: undefined reference to `_ber_free'
/tmp/easy_install-JXhRAd/python-ldap-2.4.10/Modules/ldapcontrol.c:270: undefined reference to `_ber_printf'
build/temp.cygwin-1.7.17-i686-2.7/Modules/message.o: In function `LDAPmessage_to_python':
/tmp/easy_install-JXhRAd/python-ldap-2.4.10/Modules/message.c:160: undefined reference to `_ber_free'
/tmp/easy_install-JXhRAd/python-ldap-2.4.10/Modules/message.c:199: undefined reference to `_ber_memvfree'
/tmp/easy_install-JXhRAd/python-ldap-2.4.10/Modules/message.c:243: undefined reference to `_ber_bvfree'
/tmp/easy_install-JXhRAd/python-ldap-2.4.10/Modules/message.c:134: undefined reference to `_ber_free'
/tmp/easy_install-JXhRAd/python-ldap-2.4.10/Modules/message.c:237: undefined reference to `_ber_bvfree'
build/temp.cygwin-1.7.17-i686-2.7/Modules/options.o: In function `LDAP_set_option':
/tmp/easy_install-JXhRAd/python-ldap-2.4.10/Modules/options.c:70: undefined reference to `_ber_pvt_opt_on'
collect2: ld returned 1 exit status
error: Setup script exited with error: command 'gcc' failed with exit status 1

Then I just tried to install a version of python-ldap prior to 2.4.10, like this

easy_install -N -S /usr/lib/python2.7/site-packages  -d /usr/lib/python2.7/site-packages -s /usr/local/bin  python-ldap==2.4.3

Voila. It worked fine :)