2.4. Version 9.4.2

The significant changes to the various parts of the compiler are listed in the following sections.

The LLVM backend of this release is to be used with LLVM 10, 11, 12, or 13.

2.4.1. Significant Changes

This is primarily a bug-fix release addressing packaging issues found in 9.4.1. These issues include:

  • Building with the make build system should now work reliably with GHC 9.0 (#21897, #22047)

  • Make-built binary distributions should no longer complain about incorrect GHC versions during installation (:ghc-ticket:)

  • Generated Haddock package index pages uploaded to Hackage lacked quick-jump support (#21984)

  • Cross-package identifier referenced are now linked correctly in Haddock documentation (#20001)

  • Hadrian-built binary distributions no longer attempt to install documentation if documentation was not built (#21976)

  • Package registration files installed by Hadrian-built binary distributions now have the correct permissions

In addition, a few non-packaging issues have been resolved:

  • the -no-link flag no longer attempts to link (#21866)

  • a soundness issue in GHCi has been resolved (#22042, #21083)

  • a subtle race condition in the IO manager triggered by changing the capability count was fixed (#21651)

  • GHC no longer attempts to use the platform-reserved x18 register on AArch64/Darwin (#21964)

  • GHC’s internal linker is now able to resolve symbols provided by FreeBSD’s built-in iconv implementation (#20354)

  • GHC is now able to correctly locate libc++ on FreeBSD systems

2.4.1.1. Included libraries

The package database provided with this distribution also contains a number of packages other than GHC itself. See the changelogs provided with these packages for further change information.

Package Version Reason for inclusion

ghc

9.4.5

The compiler itself

Cabal-syntax

3.8.1.0

Dependency of ghc-pkg utility

Cabal

3.8.1.0

Dependency of ghc-pkg utility

Win32

2.12.0.1

Dependency of ghc library

array

0.5.4.0

Dependency of ghc library

base

4.17.1.0

Core library

binary

0.8.9.1

Dependency of ghc library

bytestring

0.11.4.0

Dependency of ghc library

containers

0.6.7

Dependency of ghc library

deepseq

1.4.8.0

Dependency of ghc library

directory

1.3.7.1

Dependency of ghc library

exceptions

0.10.5

Dependency of ghc and haskeline library

filepath

1.4.2.2

Dependency of ghc library

ghc-boot-th

9.4.5

Internal compiler library

ghc-boot

9.4.5

Internal compiler library

ghc-compact

0.1.0.0

Core library

ghc-heap

9.4.5

GHC heap-walking library

ghc-prim

0.9.0

Core library

ghci

9.4.5

The REPL interface

haskeline

0.8.2

Dependency of ghci executable

hpc

0.6.1.0

Dependency of hpc executable

integer-gmp

1.1

Core library

libiserv

9.4.5

Internal compiler library

mtl

2.2.2

Dependency of Cabal library

parsec

3.1.16.1

Dependency of Cabal library

pretty

1.1.3.6

Dependency of ghc library

process

1.6.16.0

Dependency of ghc library

stm

2.5.1.0

Dependency of haskeline library

template-haskell

2.19.0.0

Core library

terminfo

0.4.1.5

Dependency of haskeline library

text

2.0.2

Dependency of Cabal library

time

1.12.2

Dependency of ghc library

transformers

0.5.6.2

Dependency of ghc library

unix

2.7.3

Dependency of ghc library

xhtml

3000.2.2.1

Dependency of haddock executable