Re: [Lilypond-auto] Issue 3577 in lilypond: Patch: Build: Fix bison-less build from tarball.

[lilypond]

Comment #12 on issue 3577 by address@hidden: Patch: Build: Fix bison-less  
build from tarball.
http://code.google.com/p/lilypond/issues/detail?id=3577

I have no actual idea why the presence of Documentation/out/ly-grammar.txt  
should make _any_ difference for an out-of-tree build.

Or why deleting the autoconf cache should make a difference.  Now clearly  
we also have the problem that the dependencies for ly-grammar.txt are  
wrong: I see
git grep ly-grammar.txt
Documentation/GNUmakefile:OUT_DIST_FILES = $(outdir)/ly-grammar.txt
Documentation/GNUmakefile:$(outdir)/notation.texi: $(outdir)/ly-grammar.txt
Documentation/GNUmakefile:$(outdir)/ly-grammar.txt:  
$(top-src-dir)/lily/parser.yy
Documentation/contributor.texi:@verbatiminclude ly-grammar.txt
Documentation/de/notation.tely:@verbatiminclude ly-grammar.txt
So we have an outdated dependency of notation.texi on ly-grammar.txt but it  
turns out that even that outdated dependency simply was wrong since  
notation.texi will _still_ contain the @verbatiminclude and consequently  
_not_ depend on ly-grammar.txt.  What actually depends on ly-grammar.txt is  
any target compiled _from_ notation.texi.  Or now, contributor.texi.

We still need to fix that.  But in the mean time, we can reduce the number  
of points we need to take care of by forcing the Bison dependency.  That  
also avoids Heisenbugs based on whether Bison is run or not.

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