added comments about summit build steps

 * Cuccaro et al, quant-ph/0410184

 */

// Summit compile:

// Summit set-up:

// module load cmake/3.20.2 python/3.8.10 gcc/9.3.0 cuda/11.4.0

// Interactive node request:

// bsub -Is -W 1:00 -nnodes 1 -P PHYXXX $SHELL

// Note: Summit can be **fully-booked** (running leadership-type jobs) hence the above

// request can be pending in a long time. 

// Using DM-Sim:

// qcor -linker g++ -qrt nisq adder.qasm -shots 1024 -qpu dm-sim[gpus:4]

// Note: on a login node,GPU-GPU comm is disabled, hence can only run with 1 GPU.

// Utils:

// See number of GPU's: nvidia-smi --query-gpu=name --format=csv,noheader | wc -l

// XACC/LLVM-CSP/QCOR compile:

// LLVM-CSP

// cmake ../llvm -DCMAKE_INSTALL_PREFIX=~/.llvm -DCMAKE_C_COMPILER=/sw/summit/gcc/9.3.0-2/bin/gcc -DCMAKE_CXX_COMPILER=/sw/summit/gcc/9.3.0-2/bin/g++ -DLLVM_ENABLE_PROJECTS="clang;mlir" -DBUILD_SHARED_LIBS=TRUE

// QCOR: (must add paths to the specific gcc module paths)

// cmake .. -DXACC_DIR=~/.xacc -DLLVM_ROOT=~/.llvm -DMLIR_DIR=~/.llvm/lib/cmake/mlir -DQCOR_BUILD_TESTS=TRUE -DCMAKE_BUILD_TYPE=Debug -DQCOR_EXTRA_HEADERS="/sw/summit/gcc/9.3.0-2/include/c++/9.3.0/powerpc64le-unknown-linux-gnu/;/sw/summit/gcc/9.3.0-2/include/c++/9.3.0/"

// export PATH=~/.xacc/bin:$PATH

OPENQASM 3;