BUILD.ghc

# Template for a GHC bindist that is compatible with Hazel.
package(default_visibility = [ "//visibility:public" ])

load("@io_tweag_rules_haskell//haskell:haskell.bzl", "haskell_toolchain")
load("@io_tweag_rules_haskell//haskell:c2hs.bzl", "c2hs_toolchain")

filegroup(
    name = "bin",
    srcs = glob(["bin/*"]),
)

# Provide the GHC executable separately, so that it can be used in a
# repository rule to compile Hazel.  (Repository rules can't use "generated" files,
# including filegroups, but are allowed to use files provided via
# `exports_files`.
exports_files(["bin/ghc"])

filegroup(
  name = "lib",
  srcs = glob(["lib/**/*.so*", "lib/**/*.a"]),
)

filegroup(
  name = "include",
  srcs = glob(["include/*.h"]),
)

cc_library(
  name = "threaded-rts",
  srcs = glob(["lib/ghc-*/rts/libHSrts_thr-ghc*." + ext for ext in ["so", "dylib"]]),
  hdrs = glob(["lib/ghc-*/include/**/*.h"]),
  strip_include_prefix = glob(["lib/ghc-*/include"], exclude_directories=0)[0],
)

# TODO: detect this more automatically.
cc_library(
  name = "unix-includes",
  hdrs = glob(["lib/ghc-*/unix-*/include/*.h"]),
  strip_include_prefix = glob(["lib/ghc-*/unix-*/include"], exclude_directories=0)[0],
)

haskell_toolchain(
    name = "ghc",
    version = "8.2.2",
    tools = ":bin",
    locale_archive = select({
      # For some reason glibcLocales is not available on Darwin.
      "@bazel_tools//src/conditions:darwin": None,
      "//conditions:default": "@glib_locales//:locale-archive",
    }),
)