Update readme with simple config

README.md

@@ -2,16 +2,16 @@
 
 ## Scratch-pad of build configurations that have worked
 
-### VSCode settings for configuring CMake
+## Quick start
 
-```json
-"cmake.configureArgs": [
-  "-DLLVM_TARGETS_TO_BUILD=X86",
-  "-DLLVM_ENABLE_PROJECTS=mlir;npcomp",
-  "-DPYTHON_EXECUTABLE=/bin/python3",
-  "-DLLVM_EXTERNAL_PROJECTS=npcomp",
-  "-DLLVM_ENABLE_ASSERTIONS:BOOL=ON"
-]
+```
+export LLVM_SRC_DIR=/path/to/llvm-project
+./tools/install_mlir.sh
+./tools/cmake_configure.sh
+
+cd build
+ninja
+./python/run_tests.py
 ```
 
 ### Installing pybind11

python/run_tests.py

@@ -16,7 +16,7 @@ TEST_MODULES = (
 
 # Compute PYTHONPATH for sub processes.
 DIRSEP = ":" if os.path.pathsep == "/" else ";"
-PYTHONPATH = os.path.dirname(__file__)
+PYTHONPATH = os.path.abspath(os.path.dirname(__file__))
 if "PYTHONPATH" in os.environ:
   PYTHONPATH = PYTHONPATH + DIRSEP + os.environ["PYTHONPATH"]
 CHILD_ENVIRON = dict(os.environ)