diff -up openwsman-2.8.1/bindings/ruby/extconf.rb.orig openwsman-2.8.1/bindings/ruby/extconf.rb
--- openwsman-2.8.1/bindings/ruby/extconf.rb.orig	2025-01-23 10:23:52.000000000 +0100
+++ openwsman-2.8.1/bindings/ruby/extconf.rb	2025-10-20 12:55:46.327604671 +0200
@@ -5,16 +5,31 @@
 require 'mkmf'
 # $CFLAGS = "#{$CFLAGS} -Werror"
 
+# libwsman requires 'int facility' to be defined by the application
+# Add syslog.h for LOG_DAEMON constant
+$CFLAGS = "#{$CFLAGS} -include syslog.h"
+
 # requires wsman, wsman_client, and libxml2
+# Add build directory to library search path
+$LDFLAGS = "#{$LDFLAGS} -L/builddir/build/BUILD/openwsman/openwsman-2.8.1/build/src/lib"
+
+# Add BOTH source include roots (and their /u) to compilation flags
+$CPPFLAGS = "#{$CPPFLAGS} " \
+"-I/builddir/build/BUILD/openwsman-2.8.1/include " \
+"-I/builddir/build/BUILD/openwsman-2.8.1/include/u " \
+"-I/builddir/build/BUILD/openwsman/openwsman-2.8.1/include " \
+"-I/builddir/build/BUILD/openwsman/openwsman-2.8.1/include/u"
 
-unless have_library('wsman', 'wsman_create_doc')
+# Custom test for libwsman that includes facility definition
+unless try_link("#include <syslog.h>\n#include <wsman-xml-api.h>\nint facility = LOG_DAEMON;\nint main(void) { (void)wsman_create_doc(); return 0; }", '-lwsman -lxml2')
   STDERR.puts "Cannot find wsman_create_doc() in libwsman"
   STDERR.puts "Is openwsman-devel installed ?"
   exit 1
 end
 find_header 'wsman-xml-api.h', '/usr/include/openwsman'
 
-unless have_library('wsman_client', 'wsmc_create')
+# Custom test for libwsman_client that includes facility definition
+unless try_link("#include <syslog.h>\n#include <wsman-client-api.h>\nint facility = LOG_DAEMON;\nint main(void) { (void)wsmc_create(\"localhost\", 80, \"/wsman\", \"http\", \"u\", \"p\"); return 0; }", '-lwsman_client -lwsman -lxml2')
   STDERR.puts "Cannot find wsmc_create() in libwsman_client"
   STDERR.puts "Is openwsman-devel installed ?"
   exit 1
@@ -32,8 +47,14 @@ swig = find_executable("swig")
 raise "SWIG not found" unless swig
 
 major, minor, path = RUBY_VERSION.split(".")
-raise "SWIG failed to run" unless system("#{swig} -ruby -autorename -DRUBY_VERSION=#{major}#{minor} -I. -I/usr/include/openwsman -o openwsman_wrap.c openwsman.i")
+raise "SWIG failed to run" unless system("#{swig} -ruby -autorename -DRUBY_VERSION=#{major}#{minor} " \
+"-I. -I/usr/include/openwsman " \
+"-I/builddir/build/BUILD/openwsman-2.8.1/include " \
+"-I/builddir/build/BUILD/openwsman-2.8.1/include/u " \
+"-I/builddir/build/BUILD/openwsman/openwsman-2.8.1/include " \
+"-I/builddir/build/BUILD/openwsman/openwsman-2.8.1/include/u " \
+"-o openwsman_wrap.c openwsman.i")
 
-$CPPFLAGS = "-I/usr/include/openwsman -I.."
+$CPPFLAGS = "#{$CPPFLAGS} -I/usr/include/openwsman -I.."
 
 create_makefile('_openwsman')