Difference between revisions of "Upgrading packages/Updating to GHC 6.10"

From HaskellWiki
Jump to: navigation, search
(→‎Updating to GHC 6.10 and Cabal 1.6)
Line 2: Line 2:
  
 
If you maintain a Haskell package this is for you.
 
If you maintain a Haskell package this is for you.
−
 
 
For older versions of this document:
 
For older versions of this document:
  
 
* [[/Updating to GHC 6.8]]
 
* [[/Updating to GHC 6.8]]
  
−
== Updating to GHC 6.10 and Cabal 1.6 ==
+
'''Updating to GHC 6.10 and Cabal 1.6'''
 +
 
 +
When upgrading to GHC 6.10, any of your packages that worked against
 +
the base-3 library will continue to work. GHC 6.10 provides both the old
 +
base-3 library and the new base-4.
 +
 
 +
To ensure your old code continues to work, you can have the code compile
 +
and link against base-3, and then, over time, migrate code to the base-4
 +
series.
 +
 
 +
== Adding base-3 constraints ==
  
−
Main changes:
+
How to do this depends on how you build your Haskell code. We'll start
 +
with the most simplistic build mechanisms. cabal-install, the most
 +
sophisticated tool, will sort this all out for you anyway, so things
 +
should change.
  
−
* base-3 '''and''' base-4 will be installed, meaning you can always
+
=== ghc --make ===
−
  force packages to build against the old base.
+
 
 +
Force use of package base-3 when using --make,
 +
 
 +
    ghc --make --package base-3.0.3.0
 +
 
 +
===runhaskell ===
 +
 
 +
If you build your packages with the 'runhaskell Setup.hs configure'
 +
method, then you can force the use of base-3,
 +
 
 +
    --constraint="base<4"
  
 
=== cabal-install===
 
=== cabal-install===
  
−
===runhaskell ===
+
No change required. Should it be necessary to override, use
  
−
Packages that require base-3 (e.g. for old implementations of the
+
    --constraint="base<4"
−
exceptoin type, can be built using runhaskell Setup.hs with:
 
  
−
    --constraint="base==3.*"
+
== Changes in base 4 ==
  
 +
* Exceptions
  
 
[[Category:Libraries]]
 
[[Category:Libraries]]

Revision as of 04:06, 9 October 2008

A list of things that need updating when porting packages to newer library/cabal versions.

If you maintain a Haskell package this is for you. For older versions of this document:

Updating to GHC 6.10 and Cabal 1.6

When upgrading to GHC 6.10, any of your packages that worked against the base-3 library will continue to work. GHC 6.10 provides both the old base-3 library and the new base-4.

To ensure your old code continues to work, you can have the code compile and link against base-3, and then, over time, migrate code to the base-4 series.

Adding base-3 constraints

How to do this depends on how you build your Haskell code. We'll start with the most simplistic build mechanisms. cabal-install, the most sophisticated tool, will sort this all out for you anyway, so things should change.

ghc --make

Force use of package base-3 when using --make, 

   ghc --make --package base-3.0.3.0

runhaskell

If you build your packages with the 'runhaskell Setup.hs configure' method, then you can force the use of base-3, 

   --constraint="base<4"

cabal-install

No change required. Should it be necessary to override, use 

   --constraint="base<4"

Changes in base 4

  • Exceptions
Retrieved from "https://wiki.haskell.org/index.php?title=Upgrading_packages/Updating_to_GHC_6.10&oldid=23385"