Fix skbuild arguments in build.sh (#124)

The previous method was incorrect and did not work as expected, for example specifying `-g` would not result in a Cython debug build.

Authors:
  - Peter Andreas Entschev (https://github.com/pentschev)

Approvers:
  - Lawrence Mitchell (https://github.com/wence-)

URL: #124

build.sh

@@ -219,9 +219,11 @@ fi
 if buildAll || hasArg ucxx; then
 
     cd ${REPODIR}/python/
-    python setup.py build_ext --inplace -- -DCMAKE_PREFIX_PATH=${INSTALL_PREFIX} -DCMAKE_BUILD_TYPE=${BUILD_TYPE} -DCMAKE_LIBRARY_PATH=${LIBUCXX_BUILD_DIR} -DCMAKE_CUDA_ARCHITECTURES=${UCXX_CMAKE_CUDA_ARCHITECTURES} ${EXTRA_CMAKE_ARGS} -- -j${PARALLEL_LEVEL:-1}
+    SKBUILD_CONFIGURE_OPTIONS="-DCMAKE_PREFIX_PATH=${INSTALL_PREFIX} -DCMAKE_BUILD_TYPE=${BUILD_TYPE} -DCMAKE_LIBRARY_PATH=${LIBCUDF_BUILD_DIR} -DCMAKE_CUDA_ARCHITECTURES=${CUDF_CMAKE_CUDA_ARCHITECTURES} ${EXTRA_CMAKE_ARGS}" \
+        SKBUILD_BUILD_OPTIONS="-j${PARALLEL_LEVEL:-1}" \
+        python setup.py build_ext --inplace
     if [[ ${INSTALL_TARGET} != "" ]]; then
-        python setup.py install --single-version-externally-managed --record=record.txt  -- -DCMAKE_PREFIX_PATH=${INSTALL_PREFIX} -DCMAKE_BUILD_TYPE=${BUILD_TYPE} -DCMAKE_LIBRARY_PATH=${LIBUCXX_BUILD_DIR} ${EXTRA_CMAKE_ARGS} -- -j${PARALLEL_LEVEL:-1}
+            python setup.py install --single-version-externally-managed --record=record.txt
     fi
 fi