Drop support of GHC 8.4

Author: Bodigrim

.github/workflows/ci.yml

@@ -18,7 +18,7 @@ jobs:
       fail-fast: true
       matrix:
         os: [ubuntu-latest]
-        ghc: ['8.4', '8.6', '8.8', '8.10', '9.0', '9.2', '9.4', '9.6', '9.8', '9.10', '9.12']
+        ghc: ['8.6', '8.8', '8.10', '9.0', '9.2', '9.4', '9.6', '9.8', '9.10', '9.12']
         include:
         - os: macOS-latest
           ghc: 'latest'
@@ -49,7 +49,6 @@ jobs:
         cd bytestring-*/
         cabal bench --enable-tests --enable-benchmarks --benchmark-option=-l all
     - name: Haddock
-      if: matrix.ghc != '8.4'
       run: |
         cd bytestring-*/
         cabal haddock all

bench/BenchReadInt.hs

@@ -18,9 +18,6 @@ import Test.Tasty.Bench
 import Data.Int
 import Data.Word
 import Numeric.Natural
-#if !(MIN_VERSION_base(4,11,0))
-import Data.Semigroup (Semigroup((<>)))
-#endif
 import Data.Monoid (mconcat)
 
 ------------------------------------------------------------------------------

bytestring.cabal

@@ -57,17 +57,16 @@ Author:              Don Stewart,
 Maintainer:          Haskell Bytestring Team <[email protected]>, Core Libraries Committee
 Homepage:            https://github.com/haskell/bytestring
 Bug-reports:         https://github.com/haskell/bytestring/issues
-Tested-With:         GHC==9.12.1,
-                     GHC==9.10.1,
+Tested-With:         GHC==9.12.2,
+                     GHC==9.10.2,
                      GHC==9.8.4,
-                     GHC==9.6.6,
+                     GHC==9.6.7,
                      GHC==9.4.8,
                      GHC==9.2.8,
                      GHC==9.0.2,
                      GHC==8.10.7,
                      GHC==8.8.4,
-                     GHC==8.6.5,
-                     GHC==8.4.4
+                     GHC==8.6.5
 Build-Type:          Simple
 extra-source-files:  README.md Changelog.md include/bytestring-cpp-macros.h
 
@@ -110,7 +109,7 @@ common language
 
 library
   import:          language
-  build-depends:   base >= 4.11 && < 5, ghc-prim, deepseq, template-haskell
+  build-depends:   base >= 4.12 && < 5, ghc-prim, deepseq, template-haskell
 
   if impl(ghc < 9.4)
     build-depends: data-array-byte >= 0.1 && < 0.2
@@ -249,8 +248,7 @@ benchmark bytestring-bench
   hs-source-dirs:   bench
 
   ghc-options:      -O2 "-with-rtsopts=-A32m"
-  if impl(ghc >= 8.6)
-    ghc-options:    -fproc-alignment=64
+                    -fproc-alignment=64
   build-depends:    base,
                     bytestring,
                     deepseq,

include/bytestring-cpp-macros.h

@@ -23,8 +23,7 @@ which are known not to trap (either to the kernel for emulation, or crash).
 
 
 #define HS_UNALIGNED_ByteArray_OPS_OK \
-  MIN_VERSION_base(4,12,0) \
-  && (MIN_VERSION_base(4,16,1) || HS_UNALIGNED_POKES_OK)
+  MIN_VERSION_base(4,16,1) || HS_UNALIGNED_POKES_OK
 /*
 The unaligned ByteArray# primops became available with base-4.12.0/ghc-8.6,
 but require an unaligned-friendly host architecture to be safe to use