-j3 compilation problem

[Werner LEMBERG]

After saying

  make -j3 all
  make -j3 web

I get this error:

  Processing `/home/wl/git/lilypond.compiled/input/wilhelmus.ly'
  Parsing...
  Interpreting music... [8][16][24]
  Preprocessing graphical objects...
  error: cannot find font: `emmentaler-23'

Indeed, the emmentaler-23 and emmentaler-26 stuff isn't linked
properly in the out/share/lilypond/current/fonts tree.

It seems that the problem is related to this line in mf/GNUmakefile:

  default: $(ALL_GEN_FILES) \
           $(outdir)/emmentaler-20.otf \
           tree-regen \
           $(outdir)/fonts.conf

Within a parallel build the order of execution of the prerequisites is
unspecified, thus `tree-regen' is accidentally executed too early.

A quick solution is simple (namely, running `make all' twice'), but...


    Werner