ci: put Homebrew on PATH in the pastrami job

.github/workflows/presubmit.yml

@@ -35,9 +35,15 @@ jobs:
           module use /space/pvelesko/modulefiles
           module load oneapi/2025.0.4 llvm/22.0-native HIP/chipStar/main level-zero/dgpu
           module list
+          # This install names a deleted CI staging dir; use copies of its config that name the install.
+          stale=$(sed -n 's/^HIP_PATH=//p' "$HIP_PATH/share/.hipInfo")
+          hip="$RUNNER_TEMP/chipstar-main"
+          rm -rf "$hip" && mkdir -p "$hip/bin" "$hip/share" "$hip/lib/cmake"
+          cp "$HIP_PATH/bin/hipcc" "$hip/bin/" && cp "$HIP_PATH/share/.hipInfo" "$hip/share/" && cp -r "$HIP_PATH/lib/cmake/hip" "$hip/lib/cmake/"
+          sed -i "s|$stale|$HIP_PATH|g" "$hip/share/.hipInfo" "$hip"/lib/cmake/hip/*.cmake
           rm -rf ~/.cache/chipStar build
           cmake -S . -B build \
-            -DCMAKE_CXX_COMPILER="$(which hipcc)" \
+            -DCMAKE_CXX_COMPILER="$hip/bin/hipcc" -Dhip_DIR="$hip/lib/cmake/hip" \
             -DCMAKE_BUILD_TYPE=Release \
             -DBUILD_TEST=ON -DBUILD_BENCHMARK=OFF \
             -DAMDGPU_TEST_TARGETS="" \
@@ -106,9 +112,14 @@ jobs:
         shell: bash
         run: |
           set -e
+          export PATH="/opt/homebrew/bin:$PATH"
+          # Without an explicit deployment target, clang's HIP driver asserts in Darwin::AddDeploymentTarget.
+          export MACOSX_DEPLOYMENT_TARGET=15.0
           source /opt/homebrew/Cellar/modules/5.6.0/init/bash
           module use ~/modulefiles
           module load llvm/22.0-native pocl HIP/chipStar/main
+          # The install's .hipInfo points this override at a deleted source tree.
+          export HIPCC_COMPILE_FLAGS_APPEND="-Xarch_device -I$(dirname "$(dirname "$(which hipcc)")")/include/hip/devicelib/macOS"
           module list
           rm -rf ~/.cache/chipStar build
           cmake -S . -B build \