linking problem: undefined reference to SHA1

[masiv1]

Hi,
  I am trying to use a function SHA1() from <openssl/sha.h> and i have
included the header in my include file. I still get an error when i type
make like so.

util.o(.text+0x893): In function `add_prefix':
: undefined reference to `SHA1'

I tried specifying the CPPFLAGS and LDFLAGS during configure

./configure CFLAGS="-I/usr/local/include/openssl" LDFLAGS="-L/usr/local/lib"

but it still throws the same error.

Any help is appreciated.

Thanks
Mahesh