Add spack build instructions.

README.md

@@ -1 +1,44 @@
 # SDS Distributed Key-Value
+sdsdkv is a configurable distributed key-value service.
+
+## Building
+sdsdkv depends on several pieces of software infrastructure, so it is convenient
+to build these dependencies using spack. If spack is already configured in your
+environment, then please skip to **Install dependencies**. Please note that a
+bash-like environment is assumed herein.
+
+### Get spack.
+
+```
+git clone https://github.com/spack/spack.git
+```
+
+### Configure spack and build environment.
+
+```
+source spack/share/spack/setup-env.sh
+# Setup spack for modules support.
+spack bootstrap
+```
+
+### Install dependencies.
+
+```
+# Checkout sds-repo
+git clone https://xgitlab.cels.anl.gov/sds/sds-repo.git
+# Add to spack.
+spack repo add sds-repo
+# Install via spack.
+spack install sdskeyval
+# Refresh spack environment.
+source spack/share/spack/setup-env.sh
+# Load sdskeyval modules.
+source <(spack module loads --dependencies sdskeyval)
+```
+
+### Get and build sdsdkv.
+
+```
+git clone https://xgitlab.cels.anl.gov/sds/sdsdkv.git
+cd sdsdkv && ./autogen && ./configure CXX=mpic++ && make
+```