Makefile searches for wrong oslrd plugin version - CentOS 7

[marchaase]

$ cat /etc/redhat-release
CentOS Linux release 7.7.1908 (Core)

Installing olsrd from source olsrd-0.9.0.3.tar.bz2 (http://www.olsr.org/mediawiki/index.php/Releases) on my system installs the binary and plugins to /usr/local instead of /usr

$ which olsrd
/usr/local/sbin/olsrd

the tutorial Makefile/rules.mk uses find to find the txtinfo plugin location, but it searches /usr/lib* so on my system it does not find it:

$ sudo find /usr/lib* -name "olsrd_txtinfo.so*" | wc -l
0

so on my system all of the routingN.conf plugin files have a bad stanza because the sed line replaces OLSRTXTINFO with an empty string. Making the routing config files look like:

LoadPlugin ""
{
PlParam "accept" "0.0.0.0"
}

Took a bit of debugging to figure out. Noticed olsrd wasn't running inside of the NEM containers and I had to manually run olsrd with debug mode to see a cryptic error:

$ sudo olsrd -f routing1.conf -d 2
...snip...
---------- LOADING LIBRARY  ----------
Checking plugin interface version: FAILED: "/usr/local/sbin/olsrd: undefined symbol: olsrd_plugin_interface_version"
---------- LIBRARY  FAILED ----------

This was indicative of olsrd trying to load the "" plugin and not being able to grab it's plugin interface version.

I was unable to figure out with the olsrd Makefile how to get it to install to a different location. I normally would use a ./configure script to change the prefix, but I couldn't see any easy way in olsrd's Makefile.

if I change the Makefile to remove the /lib* I can find it:

$ find /usr -name "olsrd_txtinfo.so*" | wc -l
1

My current solution was to modify the rules.mk to find the correct location of the txtinfo plugin:

diff --git a/rules.mk b/rules.mk
index 7ba97f9..4020d67 100644
--- a/rules.mk
+++ b/rules.mk
@@ -52,7 +52,7 @@ edit= sed -e 's|@NEMID[@]|$*|g' \
           -e 's|@NEMXML[@]|$(NEM_XML)|g ' \
           -e 's|@TOPDIR[@]|$(shell dirname $$(pwd))|g' \
           -e 's|@OLSRTXTINFO[@]|$(shell basename \
-                 $$(find /usr/lib* -name "olsrd_txtinfo.so*" -print 2> /dev/null))|g' \
+                 $$(find /usr -name "olsrd_txtinfo.so*" -print 2> /dev/null))|g' \
           -e 's|@NODECOUNT[@]|$(shell if [ -n "$(NODE_COUNT)" ]; \
                                       then \
                                         echo $(NODE_COUNT); \