ninja: error: 'OpenCL::OpenCL', needed by 'lib/libur_adapter_opencl.so.0.12.0', missing and no known rule to make it

[wenju-he]

Describe the bug

Clean build of latest sycl branch is successful. However, when cmake is re-run due to change in CMakeLists.txt, there is error as shown in the issue title.
This is a regression of 10af536
Tag @sarnex

To reproduce

Configure command:

python buildbot/configure.py -DLLVM_USE_LINKER=lld -DCMAKE_C_COMPILER=clang -DCMAKE_CXX_COMPILER=clang++ --cuda --hip -DCUDAToolkit_ROOT=$CUDA_PATH -DUR_HIP_ROCM_DIR=$ROCM_PATH -DLLVM_TARGETS_TO_BUILD="host;SPIRV;NVPTX;AMDGPU" -DLIBCLC_TARGETS_TO_BUILD="nvptx64--nvidiacl;amdgcn--amdhsa"

Build command:

cd build
ninja
touch ../llvm/CMakeLists.txt
ninja

Environment

• OS: Ubuntu 24.04 LTS

• Target device and vendor: no gpu

• DPC++ version: clang --version
  clang version 21.0.0git (https://github.com/intel/llvm 542a00b)

• Dependencies version: sycl-ls --verbose

<LOADER>[INFO]: failed to load adapter 'libur_adapter_cuda.so.0' with error: libcuda.so.1: cannot open shared object file: No such file or directory
<LOADER>[INFO]: failed to load adapter '/localdisk2/wenjuhe/Intel-llvm/build/lib/libur_adapter_cuda.so.0' with error: libcuda.so.1: cannot open shared object file: No such file or directory
<LOADER>[INFO]: loaded adapter 0x0x626da41d1140 (libur_adapter_hip.so.0) from /localdisk2/wenjuhe/Intel-llvm/build/lib/libur_adapter_hip.so.0
<LOADER>[INFO]: loaded adapter 0x0x626da42bde10 (libur_adapter_level_zero.so.0) from /localdisk2/wenjuhe/Intel-llvm/build/lib/libur_adapter_level_zero.so.0
<LOADER>[INFO]: loaded adapter 0x0x626da42bd7c0 (libur_adapter_level_zero_v2.so.0) from /localdisk2/wenjuhe/Intel-llvm/build/lib/libur_adapter_level_zero_v2.so.0
<LOADER>[INFO]: failed to load adapter 'libur_adapter_native_cpu.so.0' with error: libur_adapter_native_cpu.so.0: cannot open shared object file: No such file or directory
<LOADER>[INFO]: failed to load adapter '/localdisk2/wenjuhe/Intel-llvm/build/lib/libur_adapter_native_cpu.so.0' with error: /localdisk2/wenjuhe/Intel-llvm/build/lib/libur_adapter_native_cpu.so.0: cannot open shared object file: No such file or directory
<LOADER>[INFO]: failed to load adapter 'libur_adapter_offload.so.0' with error: libur_adapter_offload.so.0: cannot open shared object file: No such file or directory
<LOADER>[INFO]: failed to load adapter '/localdisk2/wenjuhe/Intel-llvm/build/lib/libur_adapter_offload.so.0' with error: /localdisk2/wenjuhe/Intel-llvm/build/lib/libur_adapter_offload.so.0: cannot open shared object file: No such file or directory
<LOADER>[INFO]: loaded adapter 0x0x626da42c0530 (libur_adapter_opencl.so.0) from /localdisk2/wenjuhe/Intel-llvm/build/lib/libur_adapter_opencl.so.0

Platforms: 0
default_selector()      : No device of requested type available.
accelerator_selector()  : No device of requested type available.
cpu_selector()          : No device of requested type available.
gpu_selector()          : No device of requested type available.
custom_selector(gpu)    : No device of requested type available.
custom_selector(cpu)    : No device of requested type available.
custom_selector(acc)    : No device of requested type available.

[sarnex]

Looking immediately, thanks for the report.