docs: add commented-out OpenROAD-from-source instructions to MODULE.bazel

Add template showing how to build OpenROAD from source instead of
using the Docker image. Useful for testing pre-release OpenROAD.

Co-Authored-By: Claude Opus 4.6 (1M context) <[email protected]>
Signed-off-by: Øyvind Harboe <[email protected]>

Author: oharboe

MODULE.bazel

@@ -53,6 +53,27 @@ orfs.default(
 )
 use_repo(orfs, "docker_orfs")
 
+# Uncomment to build OpenROAD from source instead of using the ORFS image.
+# This is useful to test the latest OpenROAD before the ORFS image is updated.
+# See: https://github.com/The-OpenROAD-Project/bazel-orfs/blob/main/docs/openroad.md
+#
+# bazel_dep(name = "openroad")
+# git_override(
+#     module_name = "openroad",
+#     commit = "df79404cd806cc435b3c3b53678ebf2441c31313",
+#     init_submodules = True,
+#     patch_strip = 1,
+#     patches = ["@bazel-orfs//:openroad-llvm-root-only.patch", "@bazel-orfs//:openroad-visibility.patch"],
+#     remote = "https://github.com/The-OpenROAD-Project/OpenROAD.git",
+# )
+# bazel_dep(name = "qt-bazel")
+# git_override(
+#     module_name = "qt-bazel",
+#     commit = "df022f4ebaa4130713692fffd2f519d49e9d0b97",
+#     remote = "https://github.com/The-OpenROAD-Project/qt_bazel_prebuilts",
+# )
+# bazel_dep(name = "toolchains_llvm", version = "1.5.0")
+
 # Auto-generate orfs_flow() targets from config.mk files.
 # See bazel-orfs.md for usage.
 orfs_designs = use_repo_rule("@bazel-orfs//private:designs.bzl", "orfs_designs")

bazel-orfs.md

@@ -233,7 +233,7 @@ To limit parallelism:
 bazelisk test --jobs=4 ...
 ```
 
-A full test suite run (46 designs, 6 platforms) takes roughly 3-4 hours
+A full test suite run (53 designs, 6 platforms) takes roughly 4-5 hours
 on a 48-core machine with default parallelism (overcommitted). Individual
 design times vary from ~1 minute (gcd) to ~63 minutes (cva6 on asap7).