To:* Simon Peyton Jones
> *Cc:* ghc-devs@haskell.org
> *Subject:* Re: Multiple versions of happy
>
>
>
> Hi Simon,
>
>
>
> According to the configure script, you can use the HAPPY env variable.
> e.g.
>
>
>
> $ HAPPY=/full/path/to/happy ./configure
That's (2), thanks. How about (1)?
From: Sebastian Graf
Sent: 30 March 2021 14:22
To: Simon Peyton Jones
Cc: ghc-devs@haskell.org
Subject: Re: Multiple versions of happy
Hi Simon,
According to the configure script, you can use the HAPPY env variable. e.g.
$ HAPPY=/full/path/to/happy
mechanism to install multiple versions of happy/alex
> etc? Eg I tried to build ghc-9.0 and got this:
>
> checking for makeinfo... no
>
> checking for python3... /usr/bin/python3
>
> checking for ghc-pkg matching /opt/ghc/bin/ghc... /opt/ghc/bin/ghc-pkg
>
> checking f
What's the approved mechanism to install multiple versions of happy/alex etc?
Eg I tried to build ghc-9.0 and got this:
checking for makeinfo... no
checking for python3... /usr/bin/python3
checking for ghc-pkg matching /opt/ghc/bin/ghc... /opt/ghc/bin/ghc-pkg
checking for happy... /home