I got to the bottom of the problem after some debugging. The short summary is - I was using "devel2" flavor which disables doc targets. The problem was it only disables them partially not fully. So even though I was able to invoke the targets I got these errors and the guide is mostly built except for the flags refs.
The long story: devel2.mk sets: BUILD_SPHINX_HTML = NO But we 'include rules/sphinx.mk' in ghc.mk unconditionally. Now, since BUILD_SPHINX_HTML is not set we filter out mkUserGuidePart from build targets: BUILD_DIRS := $(filter-out utils/mkUserGuidePart,$(BUILD_DIRS)) This results in an inconsistent state of the doc targets being available but not the mkUserGuidePart rules. So even though I was able build the docs partially I was getting these errors. -harendra On 23 August 2016 at 22:31, Harendra Kumar <harendra.ku...@gmail.com> wrote: > > Well, I tried 'make' and 'make all' (I suppose they are both same) but that did not make any difference. > > -harendra > > On 23 August 2016 at 21:37, Ben Gamari <b...@smart-cactus.org> wrote: >> >> Harendra Kumar <harendra.ku...@gmail.com> writes: >> >> > I see errors like this when using 'make html' in the topdir of the ghc repo: >> > >> Hmm, it looks like there is a missing dependency in the build system. >> The users guide depends upon a number of ReST source files generated by >> utils/mkUserGuidePart. I'd guess that you haven't built these. I'll look >> in to why this is but in the meantime the workaround is just to `make >> all` before attempting to `make html`. Sorry for the inconvenience! >> >> Cheers, >> >> - Ben > >
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