++ jool changes

jool-get-build-install.sh

@@ -5,6 +5,25 @@ set -e
 
 version=4.0.6
 
+cat <<EOF
+Required for building:
+
+Devuan:
+- dkms
+- kernel headers for current kernel
+
+Alpine:
+
+apk add build-base libnl3-dev iptables-dev argp-standalone
+
+Compiling on alpine requires:
+
+LDFLAGS=-largp
+LDFLAGS=-largp ./configure
+LDFLAGS=-largp make
+make install
+EOF
+
 wget -c https://github.com/NICMx/Jool/releases/download/v${version}/jool-${version}.tar.gz
 tar xfz jool-${version}.tar.gz