[setup] Fix config files for Resolute

Author: jwnimmer-tri

setup/ubuntu/binary_distribution/install_prereqs.sh

@@ -66,7 +66,9 @@ apt-get install ${maybe_yes} --no-install-recommends lsb-release
 
 codename=$(lsb_release -sc)
 
-if ! [[ "${codename}" =~ (jammy|noble) ]]; then
+if [[ "${codename}" =~ (resolute) ]]; then
+  echo 'WARNING: This script is unsupported on Ubuntu 26.04 (Resolute)' >&2
+elif ! [[ "${codename}" =~ (jammy|noble) ]]; then
   echo 'ERROR: This script requires Ubuntu 22.04 (Jammy) or 24.04 (Noble)' >&2
   exit 2
 fi

setup/ubuntu/binary_distribution/packages-resolute.txt

@@ -3,12 +3,12 @@ libblas-dev
 libegl1
 libeigen3-dev
 libgfortran5
-libglib2.0-0
+libglib2.0-0t64
 libglx0
 libgomp1
 liblapack3
 libopengl0
-libpython3.12
+libpython3.13
 libspdlog-dev
 libx11-6
 ocl-icd-libopencl1

tools/ubuntu-resolute.bazelrc

@@ -13,7 +13,7 @@ build:clang --host_action_env=CXX=clang++-19
 build:clang --copt=-fno-assume-unique-vtables
 build:clang --host_copt=-fno-assume-unique-vtables
 
-build --define=UBUNTU_VERSION=24.04
+build --define=UBUNTU_VERSION=26.04
 
 # This flag tells our drake_cc.bzl rules which GCC version they should expect to
 # see, so that the rules can tweak our warning flags. Note that this is not

tools/workspace/mkdoc_internal/libclang_setup.py

@@ -40,15 +40,17 @@ def add_library_paths(parameters=None):
             if os.path.exists(sdkroot):
                 parameters += ["-isysroot", sdkroot]
     elif platform.system() == "Linux":
-        # By default we expect Clang 15 to be installed, but on Ubuntu 24.04
-        # we'll use Clang 19 for compatibility with GCC 14.
+        # By default we expect Clang 15 to be installed, but on Ubuntu >= 24.04
+        # we'll use Clang 19 for compatibility with GCC >= 14.
         version = 15
         try:
             completed_process = subprocess.run(
                 ["lsb_release", "-sr"], stdout=subprocess.PIPE, encoding="utf-8"
             )
             if completed_process.returncode == 0:
-                if completed_process.stdout.strip() == "24.04":
+                output = completed_process.stdout.strip()
+                ubuntu_major = int(output.split(".")[0])
+                if ubuntu_major >= 24:
                     version = 19
         except Exception:
             pass