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Diffstat (limited to 'third_party/bazel/rules_haskell/haskell/cc.bzl')
| -rw-r--r-- | third_party/bazel/rules_haskell/haskell/cc.bzl | 353 |
1 files changed, 0 insertions, 353 deletions
diff --git a/third_party/bazel/rules_haskell/haskell/cc.bzl b/third_party/bazel/rules_haskell/haskell/cc.bzl deleted file mode 100644 index 1ec803764a..0000000000 --- a/third_party/bazel/rules_haskell/haskell/cc.bzl +++ /dev/null @@ -1,353 +0,0 @@ -"""Interop with cc_* rules - -These rules are deprecated. -""" - -load("@bazel_tools//tools/cpp:toolchain_utils.bzl", "find_cpp_toolchain") -load( - "@bazel_tools//tools/build_defs/cc:action_names.bzl", - "CPP_LINK_DYNAMIC_LIBRARY_ACTION_NAME", - "C_COMPILE_ACTION_NAME", -) -load(":private/path_utils.bzl", "ln") -load("@bazel_skylib//lib:paths.bzl", "paths") -load(":private/set.bzl", "set") -load( - "@io_tweag_rules_haskell//haskell:providers.bzl", - "HaskellInfo", -) - -CcInteropInfo = provider( - doc = "Information needed for interop with cc rules.", - fields = { - "tools": "Tools from the CC toolchain", - # See the following for why this is needed: - # https://stackoverflow.com/questions/52769846/custom-c-rule-with-the-cc-common-api - "files": "Files for all tools (input to any action that uses tools)", - "hdrs": "CC headers", - "cpp_flags": "Preprocessor flags", - "compiler_flags": "Flags for compilation", - "linker_flags": "Flags to forward to the linker", - "include_args": "Extra include dirs", - }, -) - -def cc_interop_info(ctx): - """Gather information from any CC dependencies. - - *Internal function - do not use.* - - Args: - ctx: Rule context. - - Returns: - CcInteropInfo: Information needed for CC interop. - """ - ccs = [dep[CcInfo] for dep in ctx.attr.deps if CcInfo in dep and HaskellInfo not in dep] - - hdrs = [] - include_args = [] - cpp_flags = [] - for cc in ccs: - cc_ctx = cc.compilation_context - hdrs.append(cc_ctx.headers) - include_args.extend(["-I" + include for include in cc_ctx.includes]) - cpp_flags.extend( - [ - "-D" + define - for define in cc_ctx.defines - ] + [ - f - for include in cc_ctx.quote_includes - for f in ["-iquote", include] - ] + [ - f - for include in cc_ctx.system_includes - for f in ["-isystem", include] - ], - ) - - hdrs = depset(transitive = hdrs) - - # XXX Workaround https://github.com/bazelbuild/bazel/issues/6874. - # Should be find_cpp_toolchain() instead. - cc_toolchain = ctx.attr._cc_toolchain[cc_common.CcToolchainInfo] - feature_configuration = cc_common.configure_features( - cc_toolchain = cc_toolchain, - requested_features = ctx.features, - unsupported_features = ctx.disabled_features, - ) - compile_variables = cc_common.create_compile_variables( - feature_configuration = feature_configuration, - cc_toolchain = cc_toolchain, - ) - compiler_flags = cc_common.get_memory_inefficient_command_line( - feature_configuration = feature_configuration, - action_name = C_COMPILE_ACTION_NAME, - variables = compile_variables, - ) - link_variables = cc_common.create_link_variables( - feature_configuration = feature_configuration, - cc_toolchain = cc_toolchain, - is_linking_dynamic_library = False, - is_static_linking_mode = True, - ) - linker_flags = cc_common.get_memory_inefficient_command_line( - feature_configuration = feature_configuration, - action_name = CPP_LINK_DYNAMIC_LIBRARY_ACTION_NAME, - variables = link_variables, - ) - - # Generate cc wrapper script on Darwin that adjusts load commands. - hs_toolchain = ctx.toolchains["@io_tweag_rules_haskell//haskell:toolchain"] - if hs_toolchain.is_darwin: - cc_wrapper = ctx.actions.declare_file("osx_cc_wrapper") - cc = cc_wrapper.path - ctx.actions.expand_template( - template = hs_toolchain.osx_cc_wrapper_tpl, - output = cc_wrapper, - substitutions = { - "%{cc}": cc_toolchain.compiler_executable(), - }, - ) - cc_files = ctx.files._cc_toolchain + [ - cc_wrapper, - ] - else: - cc = cc_toolchain.compiler_executable() - cc_files = ctx.files._cc_toolchain - - # XXX Workaround https://github.com/bazelbuild/bazel/issues/6876. - linker_flags = [flag for flag in linker_flags if flag not in ["-shared"]] - - tools = { - "ar": cc_toolchain.ar_executable(), - "cc": cc, - "ld": cc_toolchain.ld_executable(), - "cpp": cc_toolchain.preprocessor_executable(), - "nm": cc_toolchain.nm_executable(), - } - - # If running on darwin but XCode is not installed (i.e., only the Command - # Line Tools are available), then Bazel will make ar_executable point to - # "/usr/bin/libtool". Since we call ar directly, override it. - # TODO: remove this if Bazel fixes its behavior. - # Upstream ticket: https://github.com/bazelbuild/bazel/issues/5127. - if tools["ar"].find("libtool") >= 0: - tools["ar"] = "/usr/bin/ar" - - return CcInteropInfo( - tools = struct(**tools), - files = cc_files, - hdrs = hdrs.to_list(), - cpp_flags = cpp_flags, - include_args = include_args, - compiler_flags = compiler_flags, - # XXX this might not be the right set of flags for all situations, - # but this will anyways all be replaced (once implemented) by - # https://github.com/bazelbuild/bazel/issues/4571. - linker_flags = linker_flags, - ) - -def _cc_import_impl(ctx): - strip_prefix = ctx.attr.strip_include_prefix - - # cc_library's strip_include_prefix attribute accepts both absolute and - # relative paths. For simplicity we currently only implement absolute - # paths. - if strip_prefix.startswith("/"): - prefix = strip_prefix[1:] - else: - prefix = paths.join(ctx.label.workspace_root, ctx.label.package, strip_prefix) - - roots = set.empty() - for f in ctx.files.hdrs: - # If it's a generated file, strip off the bin or genfiles prefix. - path = f.path - if path.startswith(ctx.bin_dir.path): - path = paths.relativize(path, ctx.bin_dir.path) - elif path.startswith(ctx.genfiles_dir.path): - path = paths.relativize(path, ctx.genfiles_dir.path) - - if not path.startswith(prefix): - fail("Header {} does not have expected prefix {}".format( - path, - prefix, - )) - roots = set.insert(roots, f.root.path if f.root.path else ".") - - include_directories = [paths.join(root, prefix) for root in set.to_list(roots)] - - cc_toolchain = ctx.attr._cc_toolchain[cc_common.CcToolchainInfo] - feature_configuration = cc_common.configure_features(cc_toolchain = cc_toolchain) - - compilation_context = cc_common.create_compilation_context( - headers = depset(transitive = [l.files for l in ctx.attr.hdrs]), - includes = depset(direct = include_directories), - ) - linking_context = cc_common.create_linking_context( - libraries_to_link = [ - cc_common.create_library_to_link( - actions = ctx.actions, - feature_configuration = feature_configuration, - cc_toolchain = cc_toolchain, - dynamic_library = f, - ) - for f in ctx.attr.shared_library.files - ], - ) - - return [ - CcInfo( - compilation_context = compilation_context, - linking_context = linking_context, - ), - ] - -haskell_cc_import = rule( - _cc_import_impl, - attrs = { - "shared_library": attr.label( - # NOTE We do not list all extensions here because .so libraries may - # have numeric suffixes like foo.so.1.2.3, and if they also have - # SONAME with numeric suffix, matching file must be provided, so this - # attributes must accept libraries with almost arbitrary extensions. - # It would be easier if Skylark supported regexps. - allow_files = True, - doc = """A single precompiled shared library. - -Bazel ensures it is available to the binary that depends on it -during runtime. -""", - ), - "hdrs": attr.label_list( - allow_files = [".h"], - doc = """ - -The list of header files published by this precompiled library to be -directly included by sources in dependent rules. -""", - ), - "strip_include_prefix": attr.string( - doc = """ -The prefix to strip from the paths of the headers of this rule. -When set, the headers in the `hdrs` attribute of this rule are -accessible at their path (relative to the repository) with this -prefix cut off. - -If it's a relative path, it's taken as a package-relative one. If it's an -absolute one, it's understood as a repository-relative path. -""", - ), - "_cc_toolchain": attr.label( - default = Label("@bazel_tools//tools/cpp:current_cc_toolchain"), - ), - }, -) -"""Imports a prebuilt shared library. - -Use this to make `.so`, `.dll`, `.dylib` files residing in external -[external repositories][bazel-ext-repos] available to Haskell rules. - -*This rule is temporary replacement for [cc_import][cc_import] and is -deprecated. Use [cc_library][cc_library] instead as shown in the example.* - -Example: - ```bzl - # Deprecated, use cc_library instead. - # haskell_cc_import(name = "zlib", shared_library = "@zlib//:lib") - - cc_library(name = "zlib", srcs = ["@zlib//:lib"]) - - haskell_import( - name = "base_pkg", - package = "base", - ) - - haskell_binary( - name = "crc32sum", - srcs = ["Main.hs"], - deps = [ - "bazel_pkg", - ":zlib", - ], - ) - ``` - -[bazel-ext-repos]: https://docs.bazel.build/versions/master/external.html -[cc_import]: https://docs.bazel.build/versions/master/be/c-cpp.html#cc_import -[cc_library]: https://docs.bazel.build/versions/master/be/c-cpp.html#cc_library -""" - -def _cc_haskell_import(ctx): - dyn_libs = set.empty() - - if HaskellInfo in ctx.attr.dep: - set.mutable_union(dyn_libs, ctx.attr.dep[HaskellInfo].dynamic_libraries) - else: - fail("{0} has to provide `HaskellInfo`".format(ctx.attr.dep.label.name)) - - return [ - DefaultInfo( - files = set.to_depset(dyn_libs), - default_runfiles = ctx.runfiles( - files = ctx.attr.dep.default_runfiles.files.to_list(), - collect_default = True, - ), - data_runfiles = ctx.runfiles( - files = ctx.attr.dep.data_runfiles.files.to_list(), - collect_data = True, - ), - ), - ] - -cc_haskell_import = rule( - _cc_haskell_import, - attrs = { - "dep": attr.label( - doc = """ -Target providing a `HaskellInfo` such as `haskell_library` or -`haskell_binary`. -""", - ), - }, - toolchains = ["@io_tweag_rules_haskell//haskell:toolchain"], -) -"""Exports a Haskell library as a CC library. - -Given a [haskell_library](#haskell_library) or -[haskell_binary](#haskell_binary) input, outputs the shared object files -produced as well as the object files it depends on directly and -transitively. This is very useful if you want to link in a Haskell shared -library from `cc_library`. - -There is a caveat: this will not provide any shared libraries that -aren't explicitly given to it. This means that if you're using -`prebuilt_dependencies` and relying on GHC to provide those objects, -they will not be present here. You will have to provide those -separately to your `cc_library`. If you're getting -`prebuilt_dependencies` from your toolchain, you will likely want to -extract those and pass them in as well. - -*This rule is deprecated.* - -Example: - ```bzl - haskell_library( - name = "my-lib", - ... - ) - - cc_haskell_import( - name = "my-lib-objects", - dep = ":my-lib", - ) - - cc_library( - name = "my-cc", - srcs = ["main.c", ":my-lib-objects"], - ) - ``` - -[bazel-cpp-sandwich]: https://github.com/bazelbuild/bazel/issues/2163 -""" |