2.1. Version 9.4.8¶
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, 13, or 14.
2.1.1. Significant Changes¶
Issues fixed in this release include:
2.1.1.1. Compiler¶
- Fix a recompilation checking bug where GHC may miss changes in transitive dependencies when deciding to relink a program (#23724).
- Fix a compiler panic resulting from incorrect eta-reduction of join points (#23922).
- Fix a code generator bug on AArch64 platforms resulting in invalid conditional jumps (#23746).
- Improve STG code generation in certain scenarios (#23783).
- Fix a bug where we could silently truncate 64 bit values to 32 bit on 32 bit architectures.
- Fix
-split-sectionson Windows (#22834).
2.1.1.2. Runtime system¶
- Remove an assertion prone to race conditions (#22563).
- Fix some crashes and loops with the non-moving GC (#24042, :ghc-ticket:`23003).
- Properly escape characters when writing JSON profiles (
-pJ) (#23924).
2.1.1.3. Build system and packaging¶
- Ensure
-split-sectionsis enabled while building binary distributions for all platforms where this is supported (#21135). - Make the configure script use
AC_PATH_TOOLinstead ofAC_PATH_PROGto detect tools, making cross-compilation easier (#21601). - Fix a bug where
-DNOSMPwasn’t being passed to the C compiler even if the target doesn’t support SMP (#24082).
2.1.1.4. Core libraries¶
- Bump
baseto 4.17.2.1 - Bump
bytestringto 0.11.5.3 - Bump
processto 1.6.18.0
2.1.1.5. 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 | 9.4.8 | 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 | 4.17.2.1 | Core library |
| binary | 0.8.9.1 | Dependency of ghc library |
| bytestring | 0.11.5.3 | 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 | 9.4.8 | Internal compiler library |
| ghc-boot | 9.4.8 | Internal compiler library |
| ghc-compact | 0.1.0.0 | Core library |
| ghc-heap | 9.4.8 | GHC heap-walking library |
| ghc-prim | 0.9.1 | Core library |
| ghci | 9.4.8 | 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 | 9.4.8 | 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 | 1.6.18.0 | 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 |