I am building the Debian “dpkg” utility from source, as I find doing so increases my insight on the tool. I get stopped in the “configure” step by a failure to locate header and lib for md5. There is an md5.h under /usr/include/openssl:
/usr/include/openssl/md5.h
I tried making a symlink from /usr/include/md5.h to /usr/include/openssl/md5.h and then configure passes that test, but then fails to find a library (under /usr/lib) for the md5 functions. configure does not even say under what lib name it is looking, so I can’t “cheat” on that one by making another symlink.