From c4f139996b5b0f2852f6fabf3cec4cc23b56f4b7 Mon Sep 17 00:00:00 2001
From: amstokely <andystokely@gmail.com>
Date: Mon, 18 Nov 2024 07:30:55 -0700
Subject: [PATCH] Updated pfunit install instructions in readme.

---
 obs2ioda-v2/README.md | 19 ++++++++++++++++++-
 1 file changed, 18 insertions(+), 1 deletion(-)

diff --git a/obs2ioda-v2/README.md b/obs2ioda-v2/README.md
index 8e0bcc5..61528ee 100644
--- a/obs2ioda-v2/README.md
+++ b/obs2ioda-v2/README.md
@@ -81,7 +81,24 @@ Remember to note down the library path (`<NCEP_BUFR_LIB_PATH>`) required for the
 ---
 
 ### Installing pFUnit
-To install `pFUnit`, follow the instructions for building it with `CMake` on the [pFUnit GitHub page](https://github.com/Goddard-Fortran-Ecosystem/pFUnit?tab=readme-ov-file#building-and-installing-pfunit)
+
+To install `pFUnit` version 4.10.0, follow these steps:
+
+1. Clone the `pFUnit` repository into your desired directory (`<PFUNIT_ROOT_DIR>`):
+   ```bash
+   git clone https://github.com/Goddard-Fortran-Ecosystem/pFUnit.git -b v4.10.0 <PFUNIT_ROOT_DIR>
+   ```
+
+2. Navigate to the `pFUnit` directory:
+   ```bash
+   cd <PFUNIT_ROOT_DIR>
+   ```  
+   Follow the instructions for building version 4.10.0 with `CMake`, provided on the [pFUnit GitHub page](https://github.com/Goddard-Fortran-Ecosystem/pFUnit?tab=readme-ov-file#building-and-installing-pfunit).
+
+**Note:** If you do not intend to use this installation of `pFUnit` for testing `MPI` or `OpenMP` libraries, pass the following options to `CMake` during the build process:
+   ```bash
+   -DUSE_MPI=OFF -DUSE_OPENMP=OFF
+   ```
 
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