| But I have already built several ghc versions from source,
| -- while Happy is not visible on my computer:
|   > which happy
|     happy: Command not found.
|
| For example, in the end of this letter I show the  config.log  file of
| making ghc-6.8.3 with itself.
| (configure:5707: checking for happy
|  configure:5740: result: no
|  ...
| )
| And still ghc-6.8.3 builds itself from source.

I have no idea how -- Happy has been needed for some time.  Maybe someone else 
does.

| 1. Mayby, it finds Happy somewhere inside the installed GHC ?
|
| 2. Do you mean that GHC has changed the 'make' process after 6.8.3,
|    so that one needs to install Happy separately before making GHC
|    from source ?

I don't think this aspect has changed, but maybe Ian or Simon know.

Simon

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