Managing multiple installations of GHC
Hi folks! I want to test the new version 7 of GHC, but don't want to replace the packaged version 6.12 with it. I'm not very advanced with the internals of GHC and have some problems. So these are my questions: I installed GHC into a subdir of my homedir, let's call it ~/ghc7. How can I install additional libs there? How can I install GHC 7 parallel to GHC 6.12 with the option to choose? My OS is GNU/Linux, my Distro is Ubuntu (Lucid). Thank you very much, yours Robert Clausecker
On Wed, Dec 1, 2010 at 10:16 PM, Robert Clausecker
Hi folks!
I want to test the new version 7 of GHC, but don't want to replace the packaged version 6.12 with it. I'm not very advanced with the internals of GHC and have some problems. So these are my questions:
I installed GHC into a subdir of my homedir, let's call it ~/ghc7. How can I install additional libs there?
How can I install GHC 7 parallel to GHC 6.12 with the option to choose? My OS is GNU/Linux, my Distro is Ubuntu (Lucid).
Thank you very much, yours Robert Clausecker
If you're doing user installations of packages with 'cabal-install' it will take care of everything - all of the things that it installs are in per-GHC-version directories. I do this quite a bit and I haven't run into many hiccups yet. Except for the haddock documentation that cabal-install installs - different versions of GHC/haddock are pretty much always breaking each other when I switch back and forth. I pick which one I want by adjusting which ghc/ghci binaries are in my path. You can also tell Cabal which GHC you'd like to use as a command line option when installing packages. Antoine
_______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
On Dec 1, 2010, at 8:38 PM, Antoine Latter wrote:
If you're doing user installations of packages with 'cabal-install' it will take care of everything - all of the things that it installs are in per-GHC-version directories. ... Except for the haddock documentation that cabal-install installs - different versions of GHC/haddock are pretty much always breaking each other when I switch back and forth.
This is because cabal's default layout *doesn't* install everything in per-GHC-version directories. The layout is: <prefix> -- /usr/local if --global, ~/.cabal if --user bin -- binaries ($bindir) lib -- ($libdir) <pkgid> <compiler> -- libraries & .hi files ($libdir/$libsubdir, $dynlibdir) include -- include files ($includedir) libexec -- private binaries ($libexecdir) share -- ($datadir) <pkgid> -- data files ($datadir/$datasubdir) doc <pkgid> -- documentation ($docdir) html -- html doc ($htmldir, $haddockdir) man -- man pages ($mandir) Notice that only libraries, .hi files and includes are uner a per-compiler directory. All the other things aren't, and as you notice they clobber each other. I propose that the default in Cabal be changed to: <prefix> -- /usr/local/haskell if --global, ~/.cabal if --user, <compiler> <pkgid> bin -- binaries ($bindir) lib -- libraries & .hi files ($libdir, $libdir/$libsubdir, $dynlibdir) include -- include files ($includedir) libexec -- private binaries ($libexecdir) share -- data files ($datadir, $datadir/$datasubdir) doc -- documentation ($docdir) html -- html doc ($htmldir, $haddockdir) man -- man pages ($mandir) bin -- symlinks to binaries doc html -- master index of html doc man -- symlinks to man pages current -- symlink to current <compiler> bin -- symlink to current/bin doc -- symlink to current/doc This would put everything under a per-compiler top level dir, which is how most other language systems install (for example perl and python both do it this way) This would also allow very easy removal of an old compiler and everything that was installed for it. Removing packages is also easier: you just one <pkgid> dir per <compiler> to find and get rid of -- and you can do it with a wildcard! Thoughts? - Mark Mark Lentczner http://www.ozonehouse.com/mark/ IRC: mtnviewmark
On Dec 1, 2010, at 8:38 PM, Antoine Latter wrote:
If you're doing user installations of packages with 'cabal-install' it will take care of everything - all of the things that it installs are in per-GHC-version directories. ... Except for the haddock documentation that cabal-install installs - different versions of GHC/haddock are pretty much always breaking each other when I switch back and forth.
This is because cabal's default layout *doesn't* install everything in per-GHC-version directories. The layout is:
<prefix> -- /usr/local if --global, ~/.cabal if --user bin -- binaries ($bindir) lib -- ($libdir) <pkgid> <compiler> -- libraries & .hi files ($libdir/$libsubdir, $dynlibdir) include -- include files ($includedir) libexec -- private binaries ($libexecdir) share -- ($datadir) <pkgid> -- data files ($datadir/$datasubdir) doc <pkgid> -- documentation ($docdir) html -- html doc ($htmldir, $haddockdir) man -- man pages ($mandir)
Notice that only libraries, .hi files and includes are uner a per-compiler directory. All the other things aren't, and as you notice they clobber each other.
I propose that the default in Cabal be changed to:
<prefix> -- /usr/local/haskell if --global, ~/.cabal if --user, <compiler> <pkgid> bin -- binaries ($bindir) lib -- libraries & .hi files ($libdir, $libdir/$libsubdir, $dynlibdir) include -- include files ($includedir) libexec -- private binaries ($libexecdir) share -- data files ($datadir, $datadir/$datasubdir) doc -- documentation ($docdir) html -- html doc ($htmldir, $haddockdir) man -- man pages ($mandir) bin -- symlinks to binaries doc html -- master index of html doc man -- symlinks to man pages current -- symlink to current <compiler> bin -- symlink to current/bin doc -- symlink to current/doc
This would put everything under a per-compiler top level dir, which is how most other language systems install (for example perl and python both do it this way) This would also allow very easy removal of an old compiler and everything that was installed for it. Removing packages is also easier: you just one <pkgid> dir per <compiler> to find and get rid of -- and you can do it with a wildcard!
+1
On Thu, Dec 2, 2010 at 05:16, Robert Clausecker wrote:
How can I install GHC 7 parallel to GHC 6.12 with the option to choose? My OS is GNU/Linux, my Distro is Ubuntu (Lucid).
I created this for my Ubuntu VM: https://github.com/spl/multi-ghc Regards, Sean
participants (5)
-
Antoine Latter -
Mark Lentczner -
Robert Clausecker -
Sean Leather -
steffen