ghc:8.10.2Binary bootstrap for 8.8 on aarch64 (NixOS#97407)

pkgs/development/compilers/ghc/8.10.2-binary.nix

@@ -82,7 +82,6 @@ stdenv.mkDerivation rec {
       patchShebangs ghc-${version}/utils/
       patchShebangs ghc-${version}/configure
     '' +
-
     # We have to patch the GMP paths for the integer-gmp package.
     ''
       find . -name integer-gmp.buildinfo \
@@ -91,6 +90,12 @@ stdenv.mkDerivation rec {
       find . -name base.buildinfo \
           -exec sed -i "s@extra-lib-dirs: @extra-lib-dirs: ${libiconv}/lib@" {} \;
     '' +
+    # aarch64 does HAVE_NUMA so -lnuma requires it in library-dirs in rts/package.conf.in
+    # FFI_LIB_DIR is a good indication of places it must be needed.
+    stdenv.lib.optionalString stdenv.hostPlatform.isAarch64 ''
+      find . -name package.conf.in \
+          -exec sed -i "s@FFI_LIB_DIR@FFI_LIB_DIR ${numactl.out}/lib@g" {} \;
+    '' +
     # Rename needed libraries and binaries, fix interpreter
     stdenv.lib.optionalString stdenv.isLinux ''
       find . -type f -perm -0100 -exec patchelf \
@@ -128,14 +133,35 @@ stdenv.mkDerivation rec {
 
   # On Linux, use patchelf to modify the executables so that they can
   # find editline/gmp.
-  postFixup = stdenv.lib.optionalString stdenv.isLinux ''
-    for p in $(find "$out" -type f -executable); do
-      if isELF "$p"; then
-        echo "Patchelfing $p"
-        patchelf --set-rpath "${libPath}:$(patchelf --print-rpath $p)" $p
-      fi
-    done
-  '' + stdenv.lib.optionalString stdenv.isDarwin ''
+  postFixup = stdenv.lib.optionalString stdenv.isLinux
+    (if stdenv.hostPlatform.isAarch64 then
+      # Keep rpath as small as possible on aarch64 for patchelf#244.  All Elfs
+      # are 2 directories deep from $out/lib, so pooling symlinks there makes
+      # a short rpath.
+      ''
+      (cd $out/lib; ln -s ${ncurses6.out}/lib/libtinfo.so.6)
+      (cd $out/lib; ln -s ${gmp.out}/lib/libgmp.so.10)
+      (cd $out/lib; ln -s ${numactl.out}/lib/libnuma.so.1)
+      for p in $(find "$out/lib" -type f -name "*\.so*"); do
+        (cd $out/lib; ln -s $p)
+      done
+
+      for p in $(find "$out/lib" -type f -executable); do
+        if isELF "$p"; then
+          echo "Patchelfing $p"
+          patchelf --set-rpath "\$ORIGIN:\$ORIGIN/../.." $p
+        fi
+      done
+      ''
+    else
+      ''
+      for p in $(find "$out" -type f -executable); do
+        if isELF "$p"; then
+          echo "Patchelfing $p"
+          patchelf --set-rpath "${libPath}:$(patchelf --print-rpath $p)" $p
+        fi
+      done
+    '') + stdenv.lib.optionalString stdenv.isDarwin ''
     # not enough room in the object files for the full path to libiconv :(
     for exe in $(find "$out" -type f -executable); do
       isScript $exe && continue
@@ -169,6 +195,11 @@ stdenv.mkDerivation rec {
     enableShared = true;
   };
 
-  meta.license = stdenv.lib.licenses.bsd3;
-  meta.platforms = ["x86_64-linux" "armv7l-linux" "aarch64-linux" "i686-linux" "x86_64-darwin"];
+  meta = {
+    homepage = "http://haskell.org/ghc";
+    description = "The Glasgow Haskell Compiler";
+    license = stdenv.lib.licenses.bsd3;
+    platforms = ["x86_64-linux" "armv7l-linux" "aarch64-linux" "i686-linux" "x86_64-darwin"];
+    maintainers = with stdenv.lib.maintainers; [ lostnet ];
+  };
 }

pkgs/development/compilers/ghc/8.8.4.nix

@@ -119,7 +119,11 @@ stdenv.mkDerivation (rec {
   postPatch = "patchShebangs .";
 
   # GHC is a bit confused on its cross terminology.
-  preConfigure = ''
+  preConfigure = stdenv.lib.optionalString stdenv.isAarch64 ''
+    # Aarch64 allow backward bootstrapping since earlier versions are unstable.
+    find . -name \*\.cabal\* -exec sed -i -e 's/\(base.*\)4.14/\14.16/' {} \; \
+      -exec sed -i -e 's/\(prim.*\)0.6/\10.8/' {} \;
+  '' + ''
     for env in $(env | grep '^TARGET_' | sed -E 's|\+?=.*||'); do
       export "''${env#TARGET_}=''${!env}"
     done

pkgs/top-level/haskell-packages.nix

@@ -1,4 +1,4 @@
-{ buildPackages, pkgs, newScope }:
+{ buildPackages, pkgs, newScope, stdenv }:
 
 let
   # These are attributes in compiler and packages that don't support integer-simple.
@@ -73,7 +73,11 @@ in {
       llvmPackages = pkgs.llvmPackages_7;
     };
     ghc884 = callPackage ../development/compilers/ghc/8.8.4.nix {
-      bootPkgs = packages.ghc865Binary;
+      # aarch64 ghc865Binary gets SEGVs due to haskell#15449 or similar
+      bootPkgs = if stdenv.isAarch64 then
+          packages.ghc8102Binary
+        else
+          packages.ghc865Binary;
       inherit (buildPackages.python3Packages) sphinx;
       buildLlvmPackages = buildPackages.llvmPackages_7;
       llvmPackages = pkgs.llvmPackages_7;
@@ -85,7 +89,11 @@ in {
       llvmPackages = pkgs.llvmPackages_9;
     };
     ghc8102 = callPackage ../development/compilers/ghc/8.10.2.nix {
-      bootPkgs = packages.ghc865Binary;
+      # aarch64 ghc865Binary gets SEGVs due to haskell#15449 or similar
+      bootPkgs = if stdenv.isAarch64 then
+          packages.ghc8102Binary
+        else
+          packages.ghc865Binary;
       inherit (buildPackages.python3Packages) sphinx;
       buildLlvmPackages = buildPackages.llvmPackages_9;
       llvmPackages = pkgs.llvmPackages_9;