RE: changing configure --prefix later?

> OK, I'm building ghc-5.04.3 freshly from source, but when running
> ./configure initially, I forgot to use the --prefix= option to set the
> final installation location.  Now, after fourteen hours of building,
> I use `make install' and discover the mistake.  :-(  How can I recover
> the situation?

As it happens, I did this myself the other day, so I know the best way
to recover without 'make clean'.  This should do the trick:

  cd ghc/driver; make clean boot; make
  cd ghc/utils; make clean boot; make
  cd libraries; make boot
  cd hslibs; make boot

The last two steps are needed to rebuild package.conf which was killed
in step 1.

> I tried re-running ./configure with the intended --prefix option.
> No joy.  I tried deleting config.cache first, then re-running
> configure, and then `make install'.  In all cases, the installed
> ghc driver script still points to the wrong place (/usr/local/...)
> If I edit the installed driver script to point to the right location,
> I get errors later in the installation that the pointed-to binary
> doesn't exist.  And indeed it doesn't, because the scripts are
> installed *before* the binaries they point to, but the installation
> process itself seems to call GHC to build something.  In this case,
> the error is:
> 
>     
> --------------------------------------------------------------
> ----------
>     ==fptools== make install -wr;
>      in /grp/haskell/ghc-5.04.3/ghc/compiler
>     
> --------------------------------------------------------------
> ----------
>     /export/home/malcolm/bin/ghc -ldl -cpp -fglasgow-exts 
> -Rghc-timing -I. -IcodeGen -InativeGen -Iparser 
> -iutils:basicTypes:types:hsSyn:prelude:rename:typecheck:deSuga
> r:coreSyn:specialise:simplCore:stranal:stgSyn:simplStg:codeGen
> :absCSyn:main:profiling:parser:usageSP:cprAnalysis:compMan:ndp
> Flatten:nativeGen -package concurrent -package posix -package 
> util -recomp -Rghc-timing -H16M '-#include "hschooks.h"' -O   
>  -c main/Config.hs -o main/Config.o
> 
>     /export/home/malcolm/bin/ghc: 
> /usr/local/lib/ghc-5.04.3/ghc-5.04.3:
>     not found

I'm not sure what's happened here.  Probably Config.hs is being rebuilt
because you re-configured and it picked up a dependency, but it should
be using the compiler you originally built with.  Perhaps the act of
re-configuring has reset that to point to a compiler which doesn't
exist, in which case you should configure again and specify an explicit
--with-ghc option.

Cheers,
        Simon