Generate headers from jitify so that they're available

ci/clang_tidy.sh

@@ -22,9 +22,12 @@ set -u
 
 RAPIDS_VERSION_MAJOR_MINOR="$(rapids-version-major-minor)"
 
-# Run the CMake configure step and set the build directory for clang-tidy.
-cmake -S cpp -B cpp/build -DCMAKE_BUILD_TYPE=Release -DCMAKE_EXPORT_COMPILE_COMMANDS=ON -GNinja
+# Run the CMake configure step and set the build directory for clang-tidy. We
+# also have to build the jitify generated files or they won't exist for
+# clang-tidy to discover.
 export CUDF_ROOT="${PWD}/cpp/build"
+cmake -S cpp -B "${CUDF_ROOT}" -DCMAKE_BUILD_TYPE=Release -DCMAKE_EXPORT_COMPILE_COMMANDS=ON -GNinja
+cmake --build "${CUDF_ROOT}" --target jitify_preprocess_run
 
 # Run pre-commit checks
 pre-commit run --all-files --show-diff-on-failure --hook-stage manual clang-tidy