Building the most strightforward tests with GHC Bindist compiled with…

… Hadrian

WORKSPACE

@@ -418,14 +418,18 @@ rules_haskell_asterius_toolchains(
 )
 
 load(
-    "@rules_haskell//haskell:ghc_bindist.bzl",
-    "haskell_register_ghc_bindists",
+    "@rules_haskell//haskell:ghc_bindist_hadrian.bzl",
+    "haskell_register_ghc_bindists_hadrian",
 )
 
-haskell_register_ghc_bindists(
+haskell_register_ghc_bindists_hadrian(
+    url = "file:///home/guillaume/ExternalPrograms/ghc/_build/bindist/ghc-9.2.5-x86_64-unknown-linux.tar.xz",
+    sha256 = "e27724de38998dd6c3fb46ac5df4cf6818d779c1b749ea1afcd0b64e55b8217e",
+    strip_prefix = "ghc-9.2.5-x86_64-unknown-linux",
+    version = "9.2.5",
+    target = "x86_64-unknown-linux",
     cabalopts = test_cabalopts,
     ghcopts = test_ghcopts,
-    version = test_ghc_version,
 )
 
 register_toolchains(

examples/split.patch

@@ -7,7 +7,7 @@ index a60b284..1941c2f 100644
  Library
    ghc-options:       -Wall
 -  build-depends:     base <4.12
-+  build-depends:     base <5
++  build-depends:     base <6
    exposed-modules:   Data.List.Split, Data.List.Split.Internals
    default-language:  Haskell2010
    Hs-source-dirs:    src

haskell/c2hs.bzl

@@ -79,6 +79,7 @@ def _c2hs_library_impl(ctx):
             depset(cc.files),
             depset(hs.toolchain.bindir),
             depset(hs.toolchain.libdir),
+            depset(hs.toolchain.includedir),
             set.to_depset(version_macro_headers),
             inputs,
         ]),

haskell/ghc.BUILD.tpl

@@ -12,6 +12,10 @@ load(
     "haskell_import",
     "haskell_toolchain",
 )
+load(
+    "@rules_haskell//haskell:ghc_bindist_hadrian.bzl",
+    "copy_filegroups_to_this_package",
+)
 
 package(default_visibility = ["//visibility:public"])
 
@@ -24,6 +28,11 @@ filegroup(
     srcs = glob(["bin/*"]),
 )
 
+filegroup(
+    name = "include",
+    srcs = glob(["include/**"]),
+)
+
 filegroup(
     name = "lib",
     srcs = glob(["lib/**"]),
@@ -34,6 +43,18 @@ filegroup(
     srcs = glob(["%{docdir}/**"]),
 )
 
+# Since Bazel regular rules generate files in the "execroots" and GHC requires some files to be next to each other,
+# one has to move all the files coming from the GHC bindist tarball to an execroot.
+# These copied versions of the files are the 'generated_*_filegroup' targets.
+
+%{generated_bin_filegroup}
+
+%{generated_lib_filegroup}
+
+%{generated_include_filegroup}
+
+%{generated_docdir_filegroup}
+
 # Expose embedded MinGW toolchain when on Windows.
 
 filegroup(