Documentation will not build on platforms where GNU make is not called make

I have tried to build the source tarball on FreeBSD, but it always stops somewhere around the documentation bits with the following error message:

[..]
make -C utils/haddock/doc html SPHINX_BUILD=/usr/local/bin/sphinx-build
make: illegal option -- -
usage: make [-BPSXeiknpqrstv] [-C directory] [-D variable]
        [-d flags] [-E variable] [-f makefile] [-I directory]
        [-j max_jobs] [-m directory] [-V variable]
        [variable=value] [target ...]
utils/haddock/doc/ghc.mk:22: recipe for target 'html_utils/haddock/doc' failed
gmake[1]: *** [html_utils/haddock/doc] Error 2
Makefile:129: recipe for target 'all' failed
gmake: *** [all] Error 2

That is probably because FreeBSD has GNU make(1) as gmake, it should be invoked with that name, that is, the value of the $(MAKE) variable is not respected at the recursive invocation of make(1).

I have attached a patch for the haddock repository that fixes this problem.

Trac metadata

Trac field	Value
Version	8.0.1
Type	Bug
TypeOfFailure	OtherFailure
Priority	highest
Resolution	Unresolved
Component	Build System
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