This uses downloaded tarballs in /mit/git/tarballs because the
autotools available on athena are too old right now.

On Athena 9.4 (solaris, multics):
backport lib/sha256.c from 7.59.0+ so it'll build. Not building newer versions get due to https://github.com/curl/curl/issues/2606
./configure --prefix=/afs/sipb.mit.edu/project/git/builds/curl-7.57.0/common --exec-prefix=/afs/sipb.mit.edu/project/git/builds/curl-7.57.0/sun4x_510 --with-gssapi=/usr/athena --enable-ldaps
gmake
gmake install

Link common for each architecture:
(cd /afs/sipb.mit.edu/project/git/builds/curl-7.57.0;\
 for arch in `ls -d *_*`; do \
  (cd $arch; \
   ln -sf ../common/* . )\
 done;)

To deploy:
(cd /mit/git/curl ; ln -sf ../builds/curl-7.57.0/*_* .)