haskell.compiler.ghc902: remove at 9.0.2

Let's drop everyone's least favorite GHC version.

doc/release-notes/rl-2511.section.md

@@ -26,6 +26,8 @@
 
 - GHC 8.6 and its package set have been removed. It was only used to bootstrap GHC for powerpc64le, but this was probably broken anyway.
 
+- GHC 9.0 and its package set have been removed.
+
 - `base16-builder` node package has been removed due to lack of upstream maintenance.
 
 - `python3Packages.bjoern` has been removed, as the upstream is unmaintained and it depends on a 14-year-old version of http-parser with numerous vulnerabilities.

pkgs/development/compilers/ghc/9.0.2.nix

@@ -1,4 +0,0 @@
-import ./common-make-native-bignum.nix {
-  version = "9.0.2";
-  sha256 = "140e42b96346322d1a39eb17602bcdc76e292028ad4a69286b230bab188a9197";
-}

pkgs/development/compilers/ghc/common-make-native-bignum.nix

@@ -355,7 +355,7 @@ stdenv.mkDerivation (
         ]
     )
 
-    ++ lib.optionals (lib.versionAtLeast version "9.2") [
+    ++ [
       # Don't generate code that doesn't compile when --enable-relocatable is passed to Setup.hs
       # Can be removed if the Cabal library included with ghc backports the linked fix
       (fetchpatch {
@@ -366,17 +366,6 @@ stdenv.mkDerivation (
       })
     ]
 
-    ++ lib.optionals (lib.versionOlder version "9.2.2") [
-      # Add flag that fixes C++ exception handling; opt-in. Merged in 9.4 and 9.2.2.
-      # https://gitlab.haskell.org/ghc/ghc/-/merge_requests/7423
-      (fetchpatch {
-        name = "ghc-9.0.2-fcompact-unwind.patch";
-        # Note that the test suite is not packaged.
-        url = "https://gitlab.haskell.org/ghc/ghc/-/commit/c6132c782d974a7701e7f6447bdcd2bf6db4299a.patch?merge_request_iid=7423";
-        sha256 = "sha256-b4feGZIaKDj/UKjWTNY6/jH4s2iate0wAgMxG3rAbZI=";
-      })
-    ]
-
     # fix hyperlinked haddock sources: https://github.com/haskell/haddock/pull/1482
     ++ lib.optionals (lib.versionOlder version "9.4") [
       (fetchpatch {
@@ -417,12 +406,7 @@ stdenv.mkDerivation (
       # These cause problems as they're not eliminated by GHC's dead code
       # elimination on aarch64-darwin. (see
       # https://github.com/NixOS/nixpkgs/issues/140774 for details).
-      (
+      ./Cabal-at-least-3.6-paths-fix-cycle-aarch64-darwin.patch
-        if lib.versionAtLeast version "9.2" then
-          ./Cabal-at-least-3.6-paths-fix-cycle-aarch64-darwin.patch
-        else
-          ./Cabal-3.2-3.4-paths-fix-cycle-aarch64-darwin.patch
-      )
     ];
 
     postPatch = "patchShebangs .";
@@ -483,7 +467,7 @@ stdenv.mkDerivation (
 
       echo -n "${buildMK}" > mk/build.mk
     ''
-    + lib.optionalString (lib.versionOlder version "9.2" || lib.versionAtLeast version "9.4") ''
+    + lib.optionalString (lib.versionAtLeast version "9.4") ''
       sed -i -e 's|-isysroot /Developer/SDKs/MacOSX10.5.sdk||' configure
     ''
     + lib.optionalString (stdenv.hostPlatform.isLinux && hostPlatform.libc == "glibc") ''
@@ -495,7 +479,7 @@ stdenv.mkDerivation (
     + lib.optionalString stdenv.hostPlatform.isDarwin ''
       export NIX_LDFLAGS+=" -no_dtrace_dof"
     ''
-    + lib.optionalString (stdenv.hostPlatform.isDarwin && lib.versionAtLeast version "9.2") ''
+    + lib.optionalString (stdenv.hostPlatform.isDarwin) ''
 
       # GHC tries the host xattr /usr/bin/xattr by default which fails since it expects python to be 2.7
       export XATTR=${lib.getBin xattr}/bin/xattr
@@ -603,11 +587,6 @@ stdenv.mkDerivation (
     ]
     ++ lib.optionals enableDocs [
       sphinx
-    ]
-    ++ lib.optionals (stdenv.hostPlatform.isDarwin && lib.versions.majorMinor version == "9.0") [
-      # TODO(@sternenseemann): backport addition of XATTR env var like
-      # https://gitlab.haskell.org/ghc/ghc/-/merge_requests/6447
-      xattr
     ];
 
     # Everything the stage0 compiler needs to build stage1: CC, bintools, extra libs.

pkgs/top-level/haskell-packages.nix

@@ -110,15 +110,6 @@ in
         llvmPackages = pkgs.llvmPackages_12;
       };
       ghc810 = compiler.ghc8107;
-      ghc902 = callPackage ../development/compilers/ghc/9.0.2.nix {
-        bootPkgs = bb.packages.ghc8107Binary;
-        inherit (buildPackages.python311Packages) sphinx; # a distutils issue with 3.12
-        python3 = buildPackages.python311; # so that we don't have two of them
-        inherit (buildPackages.darwin) autoSignDarwinBinariesHook xattr;
-        buildTargetLlvmPackages = pkgsBuildTarget.llvmPackages_12;
-        llvmPackages = pkgs.llvmPackages_12;
-      };
-      ghc90 = compiler.ghc902;
       ghc928 = callPackage ../development/compilers/ghc/9.2.8.nix {
         bootPkgs =
           # GHC >= 9.0 removed the armv7l bindist
@@ -361,12 +352,6 @@ in
         compilerConfig = callPackage ../development/haskell-modules/configuration-ghc-8.10.x.nix { };
       };
       ghc810 = packages.ghc8107;
-      ghc902 = callPackage ../development/haskell-modules {
-        buildHaskellPackages = bh.packages.ghc902;
-        ghc = bh.compiler.ghc902;
-        compilerConfig = callPackage ../development/haskell-modules/configuration-ghc-9.0.x.nix { };
-      };
-      ghc90 = packages.ghc902;
       ghc928 = callPackage ../development/haskell-modules {
         buildHaskellPackages = bh.packages.ghc928;
         ghc = bh.compiler.ghc928;
@@ -458,6 +443,7 @@ in
         );
     }
     // pkgs.lib.optionalAttrs config.allowAliases {
+      ghc90 = throw "'haskell.packages.ghc90' has been removed."; # Added 2025-09-07
       ghcjs = throw "'haskell.packages.ghcjs' has been removed. Please use 'pkgsCross.ghcjs' instead."; # Added 2025-09-06
       ghcjs810 = throw "'haskell.packages.ghcjs810' has been removed. Please use 'pkgsCross.ghcjs' instead."; # Added 2025-09-06
     };

pkgs/top-level/release-haskell.nix

@@ -64,7 +64,6 @@ let
   # list of all compilers to test specific packages on
   released = with compilerNames; [
     ghc8107
-    ghc902
     ghc928
     ghc948
     ghc963
@@ -556,7 +555,6 @@ let
         # of core packages, it is not always reasonable to get cabal-install to
         # work with older compilers.
         compilerNames.ghc8107
-        compilerNames.ghc902
         compilerNames.ghc928
         compilerNames.ghc948
       ] released;
@@ -578,14 +576,11 @@ let
       haskell-language-server = lib.subtractLists [
         # Support ceased as of 2.3.0.0
         compilerNames.ghc8107
-        # Support ceased as of 2.5.0.0
-        compilerNames.ghc902
         # Support ceased as of 2.10.0.0
         compilerNames.ghc928
       ] released;
       hoogle = released;
       hlint = lib.subtractLists [
-        compilerNames.ghc902
         compilerNames.ghc9101
         compilerNames.ghc9102
         compilerNames.ghc9122
@@ -598,7 +593,6 @@ let
       titlecase = released;
       ghc-api-compat = [
         compilerNames.ghc8107
-        compilerNames.ghc902
       ];
       ghc-bignum = [
         compilerNames.ghc8107
@@ -687,11 +681,9 @@ let
         constituents = accumulateDerivations [
           jobs.pkgsMusl.haskell.compiler.ghc8107Binary
           jobs.pkgsMusl.haskell.compiler.ghc8107
-          jobs.pkgsMusl.haskell.compiler.ghc902
           jobs.pkgsMusl.haskell.compiler.ghc928
           jobs.pkgsMusl.haskell.compiler.ghcHEAD
           jobs.pkgsMusl.haskell.compiler.integer-simple.ghc8107
-          jobs.pkgsMusl.haskell.compiler.native-bignum.ghc902
           jobs.pkgsMusl.haskell.compiler.native-bignum.ghc928
           jobs.pkgsMusl.haskell.compiler.native-bignum.ghcHEAD
         ];

pkgs/top-level/release.nix

@@ -363,8 +363,6 @@ let
           packages =
             genAttrs
               [
-                # TODO: share this list between release.nix and release-haskell.nix
-                "ghc90"
                 "ghc92"
                 "ghc94"
                 "ghc96"