[Build] Disable python binding by default; Add a pybind option to build-scalehls.sh; [Readme] Update readme accordingly

README.md

@@ -21,11 +21,14 @@ For more details, please see our [HPCA'22 paper](https://arxiv.org/abs/2107.1167
 ## Setting this up
 
 ### Prerequisites
+- python3
 - cmake
 - ninja
-- clang and lld (recommended)
+- clang and lld
+
+Optionally, the following packages are required for the Python binding.
 - pybind11
-- python3 with numpy
+- numpy
 
 ### Clone ScaleHLS
 ```sh
@@ -34,7 +37,7 @@ $ cd scalehls
 ```
 
 ### Build ScaleHLS
-Run the following script to build ScaleHLS. Note that you can use `-j xx` to specify the number of parallel linking jobs.
+Run the following script to build ScaleHLS. Optionally, add `-p ON` to enable the Python binding and `-j xx` to specify the number of parallel linking jobs.
 ```sh
 $ ./build-scalehls.sh
 ```
@@ -60,7 +63,7 @@ $ scalehls-opt test_gemm.mlir -debug-only=scalehls \
     | scalehls-translate -emit-hlscpp > test_gemm_dse.cpp
 ```
 
-Meanwhile, we provide a `pyscalehls` tool to showcase the `scalehls` Python library:
+If Python binding is enabled, we provide a `pyscalehls` tool to showcase the `scalehls` Python library:
 ```sh
 $ pyscalehls.py test_gemm.c -f test_gemm > test_gemm_pyscalehls.cpp
 ```

build-scalehls.sh

@@ -5,10 +5,11 @@ set -o pipefail
 set -o nounset
 
 # Script options.
-while getopts 'j:' opt
+while getopts 'j:p:' opt
 do
   case $opt in
     j) JOBS="${OPTARG}";;
+    p) PYBIND="${OPTARG}";;
   esac
 done
 
@@ -44,8 +45,8 @@ if [ ! -f "CMakeCache.txt" ]; then
     -DLLVM_TARGETS_TO_BUILD="host" \
     -DLLVM_ENABLE_ASSERTIONS=ON \
     -DCMAKE_BUILD_TYPE=DEBUG \
-    -DMLIR_ENABLE_BINDINGS_PYTHON=ON \
-    -DSCALEHLS_ENABLE_BINDINGS_PYTHON=ON \
+    -DMLIR_ENABLE_BINDINGS_PYTHON="${PYBIND:=OFF}" \
+    -DSCALEHLS_ENABLE_BINDINGS_PYTHON="${PYBIND:=OFF}" \
     -DLLVM_PARALLEL_LINK_JOBS="${JOBS:=}" \
     -DLLVM_USE_LINKER=lld \
     -DCMAKE_C_COMPILER=clang \