SSL problem in Cygwin/Mingw32

[Maria del Rocío Walias Marcos <mrwm@tid.es>]

Hello,

    I'm trying to compile Openldap in Cygwin/Mingw32 with ssl, but when I
put the configure option --with-tls it says:
.
.
checking for openssl/ssl.h... yes
checking for ssl.h... no
checking for SSLeay_add_ssl_algorithms in -lssl... no
checking for SSL_library_init in -lssl... no
checking for ssl3_accept in -lssl... no
configure: error: Could not locate TLS/SSL package

but I set:
export CPPFLAGS="-I/usr/local/include -I<path to ssl include>"
export LDFLAGS="-L/usr/local/lib -L<path to ssl lib>"

and in the path to ssl lib there's a libssl.a

What I'm doing wrong?

Thanks in advance.

Rocío Walias