83:  What should I do if I have trouble building Emacs?

  First look in the file PROBLEMS (in the top-level directory when you
  unpack the Emacs source) to see if there is already a solution for your
  problem.  Next, look for other questions in this FAQ that have to do with
  Emacs installation and compilation problems.

  If you'd like to have someone look at your problem and help solve it, see
  question 21.

  If you don't find a solution, then report your problem via e-mail to
  bug-gnu-emacs@prep.ai.mit.edu.  Please do not post it to gnu.emacs.help
  or e-mail it to help-gnu-emacs@prep.ai.mit.edu.  For further guidelines,
  see question 10.