Switch to a preconfigured Clang for k8 and armv7
This one reuses more of Bazel's builtin features to remain up to date
more easily, and it's easier to expand support for more platforms. This
also takes care of upgrading to a newer Clang.
This will require updating to raspios bullseye on the Raspberry Pis.
This also renames armhf-debian to armv7 to match the broader Bazel
ecosystem's name for this architecture.
Change-Id: I3e2a4f4efea43e76314ca34a9293c7b4b45edd2c
Signed-off-by: Brian Silverman <bsilver16834@gmail.com>
diff --git a/third_party/bazel-toolchain/toolchain/rules.bzl b/third_party/bazel-toolchain/toolchain/rules.bzl
index 92d2d33..f27e387 100644
--- a/third_party/bazel-toolchain/toolchain/rules.bzl
+++ b/third_party/bazel-toolchain/toolchain/rules.bzl
@@ -95,6 +95,19 @@
"paths. Else, the value will be assumed to be a bazel package containing the " +
"filegroup targets as in BUILD.llvm_repo."),
),
+ "target_toolchain_roots": attr.string_dict(
+ mandatory = True,
+ # TODO: Ideally, we should be taking a filegroup label here instead of a package path, but
+ # we ultimately need to subset the files to be more selective in what we include in the
+ # sandbox for which operations, and it is not straightforward to subset a filegroup.
+ doc = ("System or package path, for each target OS and arch pair you want to support " +
+ "({}), ".format(", ".join(_supported_os_arch_keys())) +
+ "to be used as the LLVM toolchain distributions. " +
+ "If the value begins with exactly one forward slash '/', then the value is " +
+ "assumed to be a system path and the toolchain is configured to use absolute " +
+ "paths. Else, the value will be assumed to be a bazel package containing the " +
+ "filegroup targets as in BUILD.llvm_repo."),
+ ),
"sysroot": attr.string_dict(
mandatory = False,
doc = ("System path or fileset, for each target OS and arch pair you want to support " +
@@ -112,6 +125,67 @@
"({}); ".format(", ".join(_supported_os_arch_keys())) +
"see documentation for bazel's create_cc_toolchain_config_info."),
),
+ "standard_libraries": attr.string_dict(
+ mandatory = False,
+ doc = ("The C++ standard library to use, " +
+ "for each target OS and arch pair you want to support " +
+ "({}), ".format(", ".join(_supported_os_arch_keys())) +
+ "used to find this version in the sysroot or host system. " +
+ "If set to \"libc++\" \"libstdc++\", that will be passed to clang directly. " +
+ "If set to \"libstdc++-N\", then explicit paths for major version N of " +
+ "libstdc++ will be passed to clang."),
+ ),
+ "additional_target_compatible_with": attr.string_list_dict(
+ mandatory = False,
+ doc = ("Additional target_compatible_with values, " +
+ "for each target OS and arch pair you want to support " +
+ "({}), ".format(", ".join(_supported_os_arch_keys())) +
+ "in addition to the @platforms//os and @platforms//cpu entries " +
+ "added automatically."),
+ ),
+ "conlyopts": attr.string_list_dict(
+ mandatory = False,
+ doc = ("Extra flags for compiling C (not C++) files, " +
+ "for each target OS and arch pair you want to support " +
+ "({}), ".format(", ".join(_supported_os_arch_keys())) + "."),
+ ),
+ "cxxopts": attr.string_list_dict(
+ mandatory = False,
+ doc = ("Extra flags for compiling C++ (not C) files, " +
+ "for each target OS and arch pair you want to support " +
+ "({}), ".format(", ".join(_supported_os_arch_keys())) + "."),
+ ),
+ "copts": attr.string_list_dict(
+ mandatory = False,
+ doc = ("Extra flags for compiling C, C++, and assembly files, " +
+ "for each target OS and arch pair you want to support " +
+ "({}), ".format(", ".join(_supported_os_arch_keys())) + "."),
+ ),
+ "opt_copts": attr.string_list_dict(
+ mandatory = False,
+ doc = ("Extra flags for compiling C, C++, and assembly files, " +
+ "for each target OS and arch pair you want to support " +
+ "({}), ".format(", ".join(_supported_os_arch_keys())) +
+ "used only with -c opt."),
+ ),
+ "dbg_copts": attr.string_list_dict(
+ mandatory = False,
+ doc = ("Extra flags for compiling C, C++, and assembly files, " +
+ "for each target OS and arch pair you want to support " +
+ "({}), ".format(", ".join(_supported_os_arch_keys())) +
+ "used only with -c dbg."),
+ ),
+ "linkopts": attr.string_list_dict(
+ mandatory = False,
+ doc = ("Extra flags to pass to the linker, " +
+ "for each target OS and arch pair you want to support " +
+ "({}), ".format(", ".join(_supported_os_arch_keys())) + "."),
+ ),
+ "static_libstdcxx": attr.bool(
+ default = True,
+ doc = "Link the C++ standard library statically. Note that this applies " +
+ "to all C++ standard libraries, like the -static-libstdc++ clang flag.",
+ ),
"absolute_paths": attr.bool(
default = False,
doc = "Use absolute paths in the toolchain. Avoids sandbox overhead.",