$ spack install [email protected]+icd
...
     422    [  6%] Building CXX object lib/llvmopencl/CMakeFiles/llvmpasses.dir/AutomaticLocals.cc.o
     423    cd /mnt/local/cache/sbulut/spack-stage/spack-stage-pocl-1.4-wazdhmsjveyxwziwictlaykklv7tnx54/spack-build/lib/llvmopencl && /mnt/local/spack/lib/spack/env/gcc/g++  -DCL_TARGET_OP
            ENCL_VERSION=220 -DCL_USE_DEPRECATED_OPENCL_1_0_APIS -DCL_USE_DEPRECATED_OPENCL_1_1_APIS -DCL_USE_DEPRECATED_OPENCL_1_2_APIS -DCL_USE_DEPRECATED_OPENCL_2_0_APIS -DCL_USE_DEPRECA
            TED_OPENCL_2_1_APIS -I/cache/sbulut/spack-stage/spack-stage-pocl-1.4-wazdhmsjveyxwziwictlaykklv7tnx54/spack-src/include -I/mnt/local/cache/sbulut/spack-stage/spack-stage-pocl-1.
            4-wazdhmsjveyxwziwictlaykklv7tnx54/spack-build -I/cache/sbulut/spack-stage/spack-stage-pocl-1.4-wazdhmsjveyxwziwictlaykklv7tnx54/spack-src/lib/llvmopencl/../CL -I/cache/sbulut/s
            pack-stage/spack-stage-pocl-1.4-wazdhmsjveyxwziwictlaykklv7tnx54/spack-src/lib/llvmopencl/../CL/devices  -I/mnt/local/spack/opt/spack/linux-centos7-skylake/gcc-8.3.0/llvm-9.0.1-
            pihcuq2rglg3pp4scasu6z7q4hvioeuj/include -std=c++11    -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -O2 -g -DNDEBUG -fPIC   -Werror=implic
            it-function-declaration -Werror=incompatible-pointer-types -o CMakeFiles/llvmpasses.dir/AutomaticLocals.cc.o -c /cache/sbulut/spack-stage/spack-stage-pocl-1.4-wazdhmsjveyxwziwic
            tlaykklv7tnx54/spack-src/lib/llvmopencl/AutomaticLocals.cc
     424    CMakeFiles/poclcc.dir/__/lib/poclu/misc.c.o: In function `poclu_load_program_multidev':
  >> 425    /cache/sbulut/spack-stage/spack-stage-pocl-1.4-wazdhmsjveyxwziwictlaykklv7tnx54/spack-src/lib/poclu/misc.c:399: undefined reference to `clCreateProgramWithIL'
  >> 426    collect2: error: ld returned 1 exit status
  >> 427    make[2]: *** [bin/poclcc] Error 1
     428    make[2]: Leaving directory `/mnt/local/cache/sbulut/spack-stage/spack-stage-pocl-1.4-wazdhmsjveyxwziwictlaykklv7tnx54/spack-build'
  >> 429    make[1]: *** [bin/CMakeFiles/poclcc.dir/all] Error 2
     430    make[1]: *** Waiting for unfinished jobs....