Bump LLVM and switch to c++20.

`grpc` and a `rules_hdl` dep needed to be bumped too.

PiperOrigin-RevId: 605077234

.bazelrc

@@ -1,16 +1,16 @@
-build --action_env=BAZEL_CXXOPTS=-std=c++17
-build --cxxopt "-std=c++17"
+build --action_env=BAZEL_CXXOPTS=-std=c++20
+build --cxxopt "-std=c++20"
 # Enable default C++ extensions (required in switching to our packaged LLVM)
 build --copt "-D_DEFAULT_SOURCE=1"
-# Signal that we're using a compliant C++17 implementation with features removed
+# Signal that we're using a compliant C++20 implementation with features removed
 # (Required for (e.g.) Boost compatibility)
 build --copt "-D_HAS_AUTO_PTR_ETC=0"
 build --copt "-Wno-sign-compare"
 build --copt "-Wno-comment"
-build --host_cxxopt "-std=c++17"
+build --host_cxxopt "-std=c++20"
 # Enable default C++ extensions (required in switching to our packaged LLVM)
 build --host_copt "-D_DEFAULT_SOURCE=1"
-# Signal that we're using a compliant C++17 implementation with features removed
+# Signal that we're using a compliant C++20 implementation with features removed
 # (Required for (e.g.) Boost compatibility)
 build --host_copt "-D_HAS_AUTO_PTR_ETC=0"
 build --host_copt "-Wno-sign-compare"

WORKSPACE

@@ -20,25 +20,23 @@ workspace(name = "com_google_xls")
 # files because it's not allowed to use `load` inside of a function.
 load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
 
-# Commit on  2023-07-17, current as of 2023-08-05.
+# Commit on  2024-01-19, current as of 2024-02-01.
 http_archive(
-    name = "com_grail_bazel_toolchain",
-    sha256 = "5fb0a6ae0f5bc72a7d80e6de0edad906c9936729734009f1c01dac4b06f966e0",
-    strip_prefix = "bazel-toolchain-f94335f1f5434256b1793dafbb7dd07773b0e76e",
-    urls = [
-        "https://github.com/grailbio/bazel-toolchain/archive/f94335f1f5434256b1793dafbb7dd07773b0e76e.zip",
-    ],
+    name = "toolchains_llvm",
+    sha256 = "5b01ab0cf15ddf9c7e4412964238e24ca869ba0e2d0825b70d055f2b2cd895a9",
+    strip_prefix = "bazel-toolchain-05f0bc1f4b1b12ad7ce0ad5ef9235a94ff39ff54",
+    url = "https://github.com/grailbio/bazel-toolchain/archive/05f0bc1f4b1b12ad7ce0ad5ef9235a94ff39ff54.tar.gz",
 )
 
-load("@com_grail_bazel_toolchain//toolchain:deps.bzl", "bazel_toolchain_dependencies")
+load("@toolchains_llvm//toolchain:deps.bzl", "bazel_toolchain_dependencies")
 
 bazel_toolchain_dependencies()
 
-load("@com_grail_bazel_toolchain//toolchain:rules.bzl", "llvm_toolchain")
+load("@toolchains_llvm//toolchain:rules.bzl", "llvm_toolchain")
 
 llvm_toolchain(
     name = "llvm_toolchain",
-    llvm_version = "16.0.0",
+    llvm_version = "17.0.2",
 )
 
 load("@llvm_toolchain//:toolchains.bzl", "llvm_register_toolchains")

dependency_support/load_external.bzl

@@ -185,13 +185,13 @@ def load_external_repositories():
         build_file = "@com_google_xls//dependency_support/linenoise:bundled.BUILD.bazel",
     )
 
-    # Released on 2023-06-01, current as of 2023-06-06.
-    # https://github.com/grpc/grpc/releases/tag/v1.55.1
+    # Released on 2023-11-28, current as of 2024-02-01.
+    # https://github.com/grpc/grpc/releases/tag/v1.60.0
     http_archive(
         name = "com_github_grpc_grpc",
-        urls = ["https://github.com/grpc/grpc/archive/v1.55.1.tar.gz"],
-        sha256 = "9c3c0a0ad986ee4fc0a9b58fd71255010068df7d1437c425b525d68c30c85ac7",
-        strip_prefix = "grpc-1.55.1",
+        urls = ["https://github.com/grpc/grpc/archive/v1.60.0.tar.gz"],
+        integrity = "sha256-Q3BouLd307M52pTTSY8dwgZCrJv6dttDq91SIYaxVCs=",
+        strip_prefix = "grpc-1.60.0",
         repo_mapping = {
             "@local_config_python": "@python39",
             "@system_python": "@python39",

dependency_support/rules_hdl/workspace.bzl

@@ -37,9 +37,9 @@ def repo():
         sha256 = "fd9e99f6ccb9e946755f9bc444abefbdd1eedb32c372c56dcacc7eb486aed178",
     )
 
-    # Current as of 2023-12-21
-    git_hash = "08884ef0ca94fc8fc4a1bd96cd02203e7788a137"
-    archive_sha256 = "d19bb835722318d61406fc58a5762dcbb52db689eadde5ff459a6a1b7941c3d2"
+    # Current as of 2024-02-01
+    git_hash = "b99dfa1869f340c0e598522960ff514345b40a7b"
+    archive_sha256 = "2a6da82f4f51aefa38ddf82291d49846736dd6abf95f3ea149129eb985ae09ed"
 
     maybe(
         http_archive,