From e417cd42730df0fe257a62e95dbac762385e1840 Mon Sep 17 00:00:00 2001
From: Benjamin Burns <benjamin.c.burns@gmail.com>
Date: Mon, 13 Apr 2020 14:51:51 -0700
Subject: [PATCH] fix small issue in build script, add README.md (#3)

Signed-off-by: Ben Burns <803016+benjamincburns@users.noreply.github.com>
---
 README.md | 31 +++++++++++++++++++++++++++++++
 build.sh  |  7 ++++---
 2 files changed, 35 insertions(+), 3 deletions(-)
 create mode 100644 README.md

diff --git a/README.md b/README.md
new file mode 100644
index 00000000..f88310cb
--- /dev/null
+++ b/README.md
@@ -0,0 +1,31 @@
+# Besu Native
+
+This repository contains scripts and tooling that is used to build and package the native libraries used by Hyperledger Besu.
+
+## Prerequisites
+
+### Linux
+
+You'll need to be sure that gcc, make, autoconf, automake, and libtool are installed. If you are building on Ubuntu or Debian, the following command will install these dependencies for you:
+
+```
+sudo apt-get install build-essential automake autoconf libtool
+```
+
+### OS X
+
+You'll need to be sure that XCode Command Line Tools, make, autoconf, automake, and libtool are installed. The easiest way to do this is to install [Homebrew](https://brew.sh/), and then run the following command. Note that installing Homebrew will automatically install the XCode command line tools.
+
+```
+brew install autoconf automake libtool
+```
+
+### Windows
+
+TBD
+
+## Building
+
+1. This repository builds native libraries from source that is included as git submodules. To be sure that you have cloned those submodules into the appropriate locations, run `git submodule update`
+2. The build steps are entirely contained within the `build.sh` script at the repository root. Simply run this script, and all of the native modules contained herin will be configured with the correct build options for Hyperledger Besu, and built.
+
diff --git a/build.sh b/build.sh
index b321748d..7681efef 100755
--- a/build.sh
+++ b/build.sh
@@ -50,10 +50,11 @@ cd "$SCRIPTDIR/secp256k1/bitcoin-core-secp256k1"
 # delete old build dir, if exists
 rm -rf "$SCRIPTDIR/secp256k1/built" || true
 
+if [[ -e Makefile ]]; then
+  make clean
+fi
 
-
-make clean && \
-  ./autogen.sh && \
+./autogen.sh && \
   ./configure --prefix="$SCRIPTDIR/secp256k1/built" $SECP256K1_BUILD_OPTS && \
   make -j $CORE_COUNT && \
   make -j $CORE_COUNT install