===== OpenROAD =====

The [[https://theopenroadproject.org/|OpenROAD]] project provides an open source flow from rtl to gds2.

==== Install ====
The [[https://github.com/The-OpenROAD-Project/OpenROAD|OpenROAD code is available on github]]. OpenROAD provides several install methods like docker, nix, bazel and cmake.

=== Install via bazel ===

Bazel promises reproducable builds which I liked. I tried it on a virtual (via UTM) debian 13 (trixie) arm64 machine. The openroad binary is a gui application which relies on qt. It seems quite difficult to have system independent gui application. OpenROAD uses prebuild libraries, for example the xcd libraries which are from [[https://github.com/The-OpenROAD-Project/qt_bazel_prebuilts/tree/main/interface_libs|OpenROADS qt_bazel_prebuilts/interface_libs]]. It turns out that prebuild libraries are build in a ubuntu docker container and the copied to the repository. Therefore they are x86_64 and do not work on the arm64 machine.

I gave up on that one for the time being.

=== Install via cmake ===

I stole the following from the [[https://github.com/The-OpenROAD-Project/OpenROAD/blob/master/Dockerfile|Dockerfile]] to build a local version on a debian 12 machine in the lab.

<code>
git clone --recurse-submodules https://github.com/The-OpenROAD-Project/OpenROAD.git
cd OpenROAD
cp etc/DependencyInstaller.sh /tmp
sudo /tmp/DependencyInstaller.sh -ci -base
sudo /tmp/DependencyInstaller.sh -ci -common -save-deps-prefixes=/etc/openroad_deps_prefixes.txt
DEPS_ARGS=$(cat /etc/openroad_deps_prefixes.txt)
echo $DEPS_ARGS
cmake -B build -S . -DCMAKE_BUILD_TYPE=Release -DOPENROAD_VERSION=${fredo} $DEPS_ARGS
cmake --build build -- -j 8

</code>

=== Regression Test ===

To be sure that the compiled tools are actually working as expected on possibly different platforms, a regression test is a good idea. The [[https://github.com/The-OpenROAD-Project/OpenROAD/blob/master/README.md|README.md]] mentions some tests. Run: 

<code>
./test/regression flow
ctest --test-dir build -j 8
</code>


=== Build Results ===

Some collected build results:

[[or_buildresults|OpenROAD Build Results]]