fix: use ROCm 6 preset with HIP language detection for proper GPU kernel compilation

- Use --preset 'ROCm 6' for HIP build step (enables enable_language(HIP))
- Remove /opt/rocm from PATH for CPU build to prevent check_language(HIP)
- Add CMAKE_PREFIX_PATH=/opt/rocm so find_package(hip) finds hip-config.cmake
- cmake --install --component HIP now works correctly with OLLAMA_RUNNER_DIR=rocm

ai/ollama/Dockerfile

@@ -38,25 +38,37 @@ WORKDIR /build
 # ROCm paths
 ENV HIP_PATH=/opt/rocm
 ENV ROCM_PATH=/opt/rocm
-ENV PATH=/usr/local/go/bin:/opt/rocm/bin:/opt/rocm/hip/bin:/opt/rocm/hcc/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
 ENV CMAKE_GENERATOR=Ninja
 ENV LDFLAGS=-s
 
-# Step 1: Build CPU backends with GCC (default compiler)
+# Step 1: Build CPU backends with GCC (no ROCm preset)
+# Remove /opt/rocm from PATH to prevent check_language(HIP) from
+# finding a HIP compiler, which would trigger the HIP block that
+# requires find_package(hip) with proper CMAKE_PREFIX_PATH.
 RUN mkdir -p build-cpu && cd build-cpu && \
+    PATH=/usr/local/go/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin \
     cmake .. -DCMAKE_BUILD_TYPE=Release && \
     cmake --build . --target ggml-cpu -- -l $(nproc) && \
     cmake --install . --component CPU --strip --prefix /build/dist
 
-# Step 2: Build HIP backend with hipcc (legacy mode skips enable_language(HIP))
+# Step 2: Build HIP backend with ROCm preset + gfx906 target only
+# The ROCm 6 preset enables HIP language detection (enable_language(HIP))
+# which ensures GPU kernels are properly compiled for gfx906.
+# OLLAMA_RUNNER_DIR=rocm from the preset, so HIP goes to lib/ollama/rocm/
+# Need CMAKE_PREFIX_PATH so find_package(hip) finds hip-config.cmake
+# at /opt/rocm/lib/cmake/hip/hip-config.cmake.
 RUN mkdir -p build-hip && cd build-hip && \
-    CC=hipcc CXX=hipcc cmake .. \
+    cmake .. \
+      --preset 'ROCm 6' \
       -DAMDGPU_TARGETS="gfx906:xnack-" \
-      -DCMAKE_BUILD_TYPE=Release && \
+      -DCMAKE_BUILD_TYPE=Release \
-    CC=hipcc CXX=hipcc cmake --build . --target ggml-hip -- -l $(nproc) && \
+      -DCMAKE_PREFIX_PATH="/opt/rocm" && \
-    cmake --install . --component HIP --strip --prefix /build/dist
+    cmake --build . --target ggml-hip -- -l $(nproc) && \
+    cmake --install . --component HIP --strip --prefix /build/dist && \
+    echo "=== HIP install ===" && \
+    find /build/dist/lib/ollama -type f -o -type l | head -20
 
-# Step 3: Build Go binary (uses GCC for CGo linking)
+# Step 3: Build Go binary (GCC for CGo linking)
 ENV CGO_ENABLED=1
 RUN go build -trimpath -o /build/dist/ollama .
 
@@ -68,6 +80,7 @@ RUN apt-get update && DEBIAN_FRONTEND=noninteractive apt-get install -y \
     && rm -rf /var/lib/apt/lists/*
 
 # Copy ROCm 6.1 runtime libraries
+# These are needed at runtime by ggml-hip via LD_LIBRARY_PATH
 COPY --from=builder /opt/rocm/lib/ /opt/rocm/lib/
 COPY --from=builder /opt/rocm/share/ /opt/rocm/share/
 
@@ -77,7 +90,7 @@ COPY --from=builder /build/dist/lib/ /usr/lib/ollama/
 
 RUN ldconfig
 
-ENV LD_LIBRARY_PATH=/opt/rocm/lib:/usr/lib/ollama
+ENV LD_LIBRARY_PATH=/opt/rocm/lib:/usr/lib/ollama/rocm:/usr/lib/ollama
 ENV HSA_OVERRIDE_GFX_VERSION=9.0.6
 ENV HCC_AMDGPU_TARGET=gfx906
 ENV HSA_ENABLE_SDMA=0