nut-scanner depends on development files

[j-ed]

I've just compiled the latest nut v2.7.3 without any issues. As I tried to use the nut-scanner tool, the following messages were shown on the screen:

# ./nut-scanner
Cannot load USB library (libusb) : file not found. USB search disabled.
Cannot load XML library (libneon) : file not found. XML search disabled.
No start IP, skipping NUT bus (old connect method)

The libraries are definitely available on my system, therefore I used strace to identify the root cause of the problem. I found out that the program tries to load libusb.soand libneon.so, which are usually part of the development files and not available by default.

# ls -al libusb-* libneon*
lrwxrwxrwx 1 root root     17 Feb 25  2015 libneon.so.27 -> libneon.so.27.3.1
-rw-r--r-- 1 root root 143556 Feb 25  2015 libneon.so.27.3.1
lrwxrwxrwx 1 root root     19 Mar 29  2014 libusb-0.1.so.4 -> libusb-0.1.so.4.4.4
-rw-r--r-- 1 root root  14732 Mar 29  2014 libusb-0.1.so.4.4.4
lrwxrwxrwx 1 root root     19 Mar 29  2014 libusb-1.0.so.0 -> libusb-1.0.so.0.1.0
-rw-r--r-- 1 root root  76636 Mar 29  2014 libusb-1.0.so.0.1.0

As I searched for a solution of the problem I found out that this problem has already been addresses for the Fedora project files three years ago, but it seems that the changes has not been implemented in the nut base package:

[nut] do not depend on devel files (#838139)
https://lists.fedoraproject.org/archives/list/scm-commits%40lists.fedoraproject.org/message/KVXANOQPK6G7JMBPDT34XVRJWI7IBKOF/

[jimklimov]

For historic reference: work done in #2431 (several PRs, primarily #2504 and later chiseling to perfection) should probably make the patches applied (back then for NUT v2.7.x at least) by Fedora recipes not needed, with a sturdier solution to be offered out of the box with NUT v2.8.3 and later. CC @opoplawski