Update rules_hdl to use more bzlmod deps.

This is in preparation to use parts of ortools that use eigen, which conflicts with how rules_hdl sets up ortools+eigen. While we're at it, let's bump to the latest rules_hdl.

Related: hdl/bazel_rules_hdl#336
PiperOrigin-RevId: 861361594

Author: grebe

MODULE.bazel

@@ -115,6 +115,7 @@ maven.artifact(
 )
 
 # Used both by XLS and rules_hdl.
+bazel_dep(name = "eigen", version = "4.0.0-20241125.bcr.2")
 bazel_dep(name = "rules_pkg", version = "1.2.0")
 
 # Workaround suggested by a Bazel team member; only needed for WORKSPACE to work correctly.
@@ -127,6 +128,14 @@ proto_bazel_features(name = "proto_bazel_features")
 bazel_dep(name = "rules_bison", version = "0.3")
 bazel_dep(name = "rules_flex", version = "0.3")
 bazel_dep(name = "rules_m4", version = "0.3")
+bazel_dep(name = "swig", version = "4.3.0")
+
+# TODO: rigge - Remove this override once the patch is in the main repo.
+single_version_override(
+    module_name = "swig",
+    patch_strip = 1,
+    patches = ["//dependency_support/rules_hdl:swig_bzlmod.patch"],
+)
 
 # Dev dependencies
 bazel_dep(name = "fuzztest", version = "20250805.0", dev_dependency = True, repo_name = "com_google_fuzztest")

MODULE.bazel.lock

@@ -0,0 +1,26 @@
+diff --git a/dependency_support/com_github_yosyshq_nextpnr/bundled.BUILD.bazel b/dependency_support/com_github_yosyshq_nextpnr/bundled.BUILD.bazel
+index ca6a2f7..b63fd7a 100644
+--- dependency_support/com_github_yosyshq_nextpnr/bundled.BUILD.bazel
++++ dependency_support/com_github_yosyshq_nextpnr/bundled.BUILD.bazel
+@@ -42,7 +42,7 @@ DEPS = [
+     "@boost//:python",
+     "@boost//:system",
+     "@boost//:thread",
+-    "@eigen//:eigen3",
++    "@eigen//:eigen",
+     "@rules_python//python/cc:current_py_cc_headers",
+ ]
+
+diff --git a/dependency_support/org_theopenroadproject/build_helper.bzl b/dependency_support/org_theopenroadproject/build_helper.bzl
+index fd4259c..2b58b21 100644
+--- dependency_support/org_theopenroadproject/build_helper.bzl
++++ dependency_support/org_theopenroadproject/build_helper.bzl
+@@ -299,7 +299,7 @@ OPENROAD_LIBRARY_DEPS = [
+     "@boost//:property_tree",
+     "@boost//:stacktrace",
+     "@boost//:thread",
+-    "@eigen//:eigen3",
++    "@eigen//:eigen",
+     "@com_github_quantamhd_lemon//:lemon",
+     "@org_llvm_openmp//:openmp",
+     "@com_github_gabime_spdlog//:spdlog",

dependency_support/rules_hdl/rename_eigen.patch

@@ -0,0 +1,29 @@
+index b5c1242..7a43e4f 100644
+--- dependency_support/org_theopenroadproject/tcl_wrap_cc.bzl
++++ dependency_support/org_theopenroadproject/tcl_wrap_cc.bzl
+@@ -85,6 +85,9 @@ def _tcl_wrap_cc_impl(ctx):
+         outputs = [output_file],
+         inputs = src_inputs,
+         arguments = [args],
++        env = {
++            "SWIG_LIB": "external/swig~/Lib",
++        },
+-        tools = ctx.files._swig,
++        tools = ctx.files._swig_lib,
+         executable = ([file for file in ctx.files._swig if file.basename == "swig"][0]),
+     )
+@@ -135,8 +138,13 @@ tcl_wrap_cc = rule(
+         "swig_options": attr.string_list(
+             doc = "args to pass directly to the swig binary",
+         ),
++        "_swig_lib": attr.label(
++            default = "@swig//:lib_tcl",
++            allow_files = True,
++            cfg = "exec",
++        ),
+         "_swig": attr.label(
+-            default = "@org_swig//:swig_stable",
++            default = "@swig//:swig",
+             allow_files = True,
+             cfg = "exec",
+         ),

dependency_support/rules_hdl/rename_swig.patch

@@ -0,0 +1,42 @@
+diff --git a/dependency_support/dependency_support.bzl b/dependency_support/dependency_support.bzl
+index 5f559a7..310c40f 100644
+--- dependency_support/dependency_support.bzl
++++ dependency_support/dependency_support.bzl
+@@ -32,10 +32,6 @@ load("//dependency_support/com_github_westes_flex:com_github_westes_flex.bzl", "
+ load("//dependency_support/com_github_yosyshq_nextpnr:com_github_yosyshq_nextpnr.bzl", "com_github_yosyshq_nextpnr")
+ load("//dependency_support/com_github_yosyshq_prjtrellis:com_github_yosyshq_prjtrellis.bzl", "com_github_yosyshq_prjtrellis")
+ load("//dependency_support/com_github_yosyshq_prjtrellis_db:com_github_yosyshq_prjtrellis_db.bzl", "com_github_yosyshq_prjtrellis_db")
+-load("//dependency_support/com_google_absl:com_google_absl.bzl", "com_google_absl")
+-load("//dependency_support/com_google_googletest:com_google_googletest.bzl", "com_google_googletest")
+-load("//dependency_support/com_google_ortools:com_google_ortools.bzl", "com_google_ortools")
+-load("//dependency_support/com_google_protobuf:com_google_protobuf.bzl", "com_google_protobuf")
+ load("//dependency_support/com_google_skywater_pdk:com_google_skywater_pdk.bzl", "com_google_skywater_pdk")
+ load("//dependency_support/com_icarus_iverilog:com_icarus_iverilog.bzl", "com_icarus_iverilog")
+ load("//dependency_support/com_opencircuitdesign_magic:com_opencircuitdesign_magic.bzl", "com_opencircuitdesign_magic")
+@@ -55,7 +51,6 @@ load("//dependency_support/org_nixos_patchelf:org_nixos_patchelf.bzl", "org_nixo
+ load("//dependency_support/org_pcre_ftp:org_pcre_ftp.bzl", "org_pcre_ftp")
+ load("//dependency_support/org_sourceware_bzip2:org_sourceware_bzip2.bzl", "org_sourceware_bzip2")
+ load("//dependency_support/org_sourceware_libffi:org_sourceware_libffi.bzl", "org_sourceware_libffi")
+-load("//dependency_support/org_swig:org_swig.bzl", "org_swig")
+ load("//dependency_support/org_theopenroadproject:org_theopenroadproject.bzl", "org_theopenroadproject")
+ load("//dependency_support/org_theopenroadproject_asap7_pdk_r1p7:org_theopenroadproject_asap7_pdk_r1p7.bzl", "org_theopenroadproject_asap7_pdk_r1p7")
+ load("//dependency_support/org_theopenroadproject_asap7sc6t_26:org_theopenroadproject_asap7sc6t_26.bzl", "org_theopenroadproject_asap7sc6t_26")
+@@ -86,10 +81,6 @@ def dependency_support(register_toolchains = True):
+     com_github_yosyshq_nextpnr()
+     com_github_yosyshq_prjtrellis()
+     com_github_yosyshq_prjtrellis_db()
+-    com_google_absl()
+-    com_google_googletest()
+-    com_google_protobuf()
+-    com_google_ortools()
+     com_google_skywater_pdk()
+     com_icarus_iverilog()
+     com_opencircuitdesign_magic()
+@@ -109,7 +100,6 @@ def dependency_support(register_toolchains = True):
+     org_pcre_ftp()
+     org_sourceware_bzip2()
+     org_sourceware_libffi()
+-    org_swig()
+     org_theopenroadproject()
+     org_theopenroadproject_asap7_pdk_r1p7()
+     org_theopenroadproject_asap7sc6t_26()

dependency_support/rules_hdl/rules_hdl_deps.patch

@@ -0,0 +1,20 @@
+diff --git a/BUILD b/BUILD
+index a2b99dc83..d5e6f7a8b 100644
+--- a/BUILD
++++ b/BUILD
+@@ -161,3 +161,15 @@ filegroup(
+     licenses = ["notice"],  # simple notice license for Lib/
+     visibility = ["//visibility:public"],
+ )
++
++filegroup(
++    name = "lib_tcl",
++    srcs = glob([
++        "Lib/*",
++        "Lib/tcl/*",
++        "Lib/std/*",
++        "Lib/typemaps/*",
++    ]),
++    licenses = ["notice"],  # simple notice license for Lib/
++    visibility = ["//visibility:public"],
++)

dependency_support/rules_hdl/swig_bzlmod.patch

@@ -29,15 +29,20 @@ def repo():
         sha256 = "fd9e99f6ccb9e946755f9bc444abefbdd1eedb32c372c56dcacc7eb486aed178",
     )
 
-    # Current as of 2025-11-07
-    git_hash = "d17bb1646fa36e6172b349cc59af8d31a427cf23"
+    # Current as of 2026-01-26
+    git_hash = "af93b9a5893e482f9959ce351834960e09a45a7b"
 
     maybe(
         http_archive,
         name = "rules_hdl",
-        integrity = "sha256-aWjEZVtMMTiO80C3a2c3WBtKJA0WzUgUzqMkA0QLsjs=",
+        integrity = "sha256-qphNuOxqovqNpGtk7sKxclWLPtxnoPm8ViyT+hiMaiw=",
         strip_prefix = "bazel_rules_hdl-%s" % git_hash,
         urls = [
             "https://github.com/hdl/bazel_rules_hdl/archive/%s.tar.gz" % git_hash,
         ],
+        patches = [
+            Label("@//dependency_support/rules_hdl:rules_hdl_deps.patch"),
+            Label("@//dependency_support/rules_hdl:rename_eigen.patch"),
+            Label("@//dependency_support/rules_hdl:rename_swig.patch"),
+        ],
     )

dependency_support/rules_hdl/workspace.bzl

@@ -173,7 +173,7 @@ cc_test(
         "@com_google_absl//absl/flags:flag",
         "@com_google_absl//absl/status",
         "@com_google_absl//absl/types:span",
-        "@eigen//:eigen3",
+        "@eigen",
     ],
 )
 
@@ -546,7 +546,7 @@ cc_test(
         "@com_google_absl//absl/log",
         "@com_google_absl//absl/random",
         "@com_google_absl//absl/status:statusor",
-        "@eigen//:eigen3",
+        "@eigen",
         "@googletest//:gtest",
     ] + [":bfloat16_" + top + "_jit_wrapper" for top in BFLOAT16_CMP_TOPS],
 )
@@ -582,7 +582,7 @@ cc_test(
         "@com_google_absl//absl/log:check",
         "@com_google_absl//absl/random",
         "@com_google_absl//absl/status:statusor",
-        "@eigen//:eigen3",
+        "@eigen",
         "@googletest//:gtest",
     ],
 )

xls/dslx/stdlib/tests/BUILD

@@ -272,7 +272,7 @@ TEST_F(PipelineSchedulingPassTest, FdoWithMultipleProcs) {
                            GetXlsRunfilePath("third_party/yosys/yosys"));
   XLS_ASSERT_OK_AND_ASSIGN(
       std::filesystem::path sta_path,
-      GetXlsRunfilePath("@org_theopenroadproject/opensta"));
+      GetXlsRunfilePath("@org_theopenroadproject/src/sta/opensta"));
   XLS_ASSERT_OK_AND_ASSIGN(
       std::filesystem::path lib_path,
       GetXlsRunfilePath("@com_google_skywater_pdk_sky130_fd_sc_hd/timing/"