[Ecls-list] configure and make dependencies

[Raymond Toy]

While playing around with ecl on sparc, I ran into some small issues.

First, configure wants to create the directory build and then configure 
there.  Could this be extended so that I can configure in any 
directory?  Then I can have just one source tree and many build-foo 
directories.  XEmacs supports this.  Clisp's configure basically does 
what ecl's configure does, but allows the user to name the directory.

Second, the makefile dependencies are kind of lacking.  I added a hack 
to ecl/src/h/ecl.h.  But doing make in build doesn't recompile 
anything.  So then I changed build/ecl/ecl.h.  Still nothing gets 
rebuilt.  Ok.  I removed build/libeclmin.a.  Make again.  Nothing gets 
built.  Ok.  Remove c/print.o and c/numbers.o.  Finally, the things I 
want to rebuild actually do get rebuilt.  Yay!

Is that the way it's supposed to work?  I know it's kind of hard to get 
all the dependencies right, but it sure is nice when it works.

Ray