Not finding openssl during a pkg build (mailsend)

[Harry Putnam <reader@newsguy.com>]

cat /etc/debian_version
9.4

Summary:

Trying to compile a tool called `mailsend'
 (https://github.com/muquit/mailsend/releases/)

(Which does not appear to be available in the regular repo).

But cannot get it to find openssl.

I do have openssl and libssl-dev installed;

-------       -------       ---=---       -------       -------

Details

A check of apt-get search openssl

A quick check of ./configure file suggests using:


 grep [\-]-with.*openssl ./configure
  --with-openssl=PATH     where the root of OpenSSL is installed
  --with-openssl-includes where the OpenSSL includes are.
  --with-openssl-libraris where the OpenSSL library is installed.

I tried --with-openssl=/usr/bin/openssl

  and
  --with-openssl=/usr/lib/ssl

  and
  --with-openssl-includes=/usr/include/openssl

using dpkg -L and `grep -v' (to keep down the amount of data) shows:

  dpkg -L openssl |grep -v share
  
  /etc
  /etc/ssl
  /etc/ssl/certs
  /etc/ssl/openssl.cnf
  /etc/ssl/private
  /usr
  /usr/bin
  /usr/bin/c_rehash
  /usr/bin/openssl
  /usr/lib
  /usr/lib/ssl
  /usr/lib/ssl/misc
  /usr/lib/ssl/misc/CA.pl
  /usr/lib/ssl/misc/tsget
  /usr/lib/ssl/certs
  /usr/lib/ssl/openssl.cnf
  /usr/lib/ssl/private

and
  dpkg -L libssl-dev  (95 lines of output omitted)


Are there other parts of openssl I need to install?


I'm not figuring out how to direct this build toward openssl, but the
configure process continues to show:

  [...]

  checking for OpenSSL... no

  [...]