Update README.md
Added explanations and csh/tcsh/fish specific instructions.
diff --git a/README.md b/README.md
index 5b3580e..5bdb687 100644
--- a/README.md
+++ b/README.md
@@ -24,7 +24,7 @@
git submodule update --init --recursive --progress
```
-All following commands assume you remain in the `mpact-compiler` directory.
+All of the following commands assume you remain in the `mpact-compiler` directory.
### Setup Python virtual environment
@@ -32,13 +32,30 @@
```shell
python3.11 -m venv mpact_venv # one time set up
-source mpact_venv/bin/activate # for each session
```
-Also make sure to set the Python paths as follows.
+NOTE: every session you have in this repo requires one of the following
+three commands (maybe add it to your .*sh file?). (Remember to replace
+"<path_to_mpact_compiler>" with your specific path.)
+```shell
+source <path_to_mpact_compiler>/mpact_venv/bin/activate # for bash/sh/etc.
+
+source <path_to_mpact_compiler>/mpact_venv/bin/activate.csh # for csh/tcsh/etc.
+
+source <path_to_mpact_compiler>/mpact_venv/bin/activate.fish # for fish/etc.
+```
+
+Also make sure to set the Python paths as follows -- note that shell
+syntax depends on the shell you're running, and you need to replace
+"<path_to_mpact_compiler>" with your specific path.
```shell
-export PYTHONPATH=`pwd`/build/tools/torch-mlir/python_packages/torch_mlir:`pwd`/build/tools/mpact/python_packages/mpact
+# FOR bash/sh/etc.
+export PYTHONPATH=<path_to_mpact_compiler>/build/tools/torch-mlir/python_packages/torch_mlir: \\
+ <path_to_mpact_compiler>/build/tools/mpact/python_packages/mpact
+
+# FOR csh/tcsh/etc.
+setenv PYTHONPATH <path_to_mpact_compiler>/build/tools/torch-mlir/python_packages/torch_mlir:<path_to_mpact_compiler>/build/tools/mpact/python_packages/mpact
```
### Install build requirements
@@ -58,6 +75,12 @@
project completely *in-tree*, which means that both LLVM as well as torch-mlir
are built from source.
+NOTE: if using csh/tcsh/etc., run the following command:
+
+```shell
+rehash
+```
+
```shell
cmake -GNinja -Bbuild \
-DCMAKE_BUILD_TYPE=Release \
