ARROW-8333: [C++] Compile benchmarks in at least one C++ CI entry

None of our every-commit CI builds compile the benchmarks, which may cause some of them to be broken when there are API changes.

Closes #6839 from wesm/ARROW-8333

Authored-by: Wes McKinney <wesm+git@apache.org>
Signed-off-by: Wes McKinney <wesm+git@apache.org>

ci/scripts/cpp_build.sh

@@ -47,6 +47,7 @@ pushd ${build_dir}
 cmake -G "${CMAKE_GENERATOR:-Ninja}" \
       -DARROW_BOOST_USE_SHARED=${ARROW_BOOST_USE_SHARED:-ON} \
       -DARROW_BUILD_BENCHMARKS=${ARROW_BUILD_BENCHMARKS:-OFF} \
+      -DARROW_BUILD_BENCHMARKS_REFERENCE=${ARROW_BUILD_BENCHMARKS:-OFF} \
       -DARROW_BUILD_EXAMPLES=${ARROW_BUILD_EXAMPLES:-OFF} \
       -DARROW_BUILD_INTEGRATION=${ARROW_BUILD_INTEGRATION:-OFF} \
       -DARROW_BUILD_SHARED=${ARROW_BUILD_SHARED:-ON} \

ci/scripts/cpp_test.sh

@@ -42,7 +42,7 @@ esac
 
 pushd ${build_dir}
 
-ctest --output-on-failure -j${n_jobs}
+ctest -L unittest --output-on-failure -j${n_jobs}
 
 if [ "${ARROW_FUZZING}" == "ON" ]; then
     # Fuzzing regression tests

docker-compose.yml

@@ -119,6 +119,7 @@ services:
       ARROW_ENABLE_TIMING_TESTS:  # inherit
       ARROW_USE_LD_GOLD: "ON"
       ARROW_USE_PRECOMPILED_HEADERS: "ON"
+      ARROW_BUILD_BENCHMARKS: "ON"
     volumes: &conda-volumes
       - .:/arrow:delegated
       - ${ARCH}-conda-cache:/build:delegated