• Paolo G. Giarrusso's avatar
    Makefile: fix recursive invocation to use `$(MAKE)` · b1da9a23
    Paolo G. Giarrusso authored
    Calling `make` is known-bad in many cases, but never as much as here:
    
    ```
    make[2]: Nothing to be done for `pre-all'.
    touch theories/algebra/ofe.vo
    touch theories/algebra/monoid.vo
    touch theories/algebra/cmra.vo
    [...]
    touch theories/heap_lang/lib/array.vo
    make[2]: Nothing to be done for `post-all'.
    make[1]: *** wait: No child processes.  Stop.
    gmake: *** [Makefile:3: all] Error 2
    ```
    b1da9a23