ZIP file jboss-ep-native-5.1.0-solaris10-sparc64.zip from jbossas-installer-native-5.1.0.CR1.tar.gz (http://download.devel.redhat.com/devel/candidates/JBEAP5.0.0/JBEAP-5.1.0-CR1/) doesn't contain SASL libraries, only few .h files.

Other Solaris native ZIP files contain SASL libraries.

Hudson: http://hudson.qa.jboss.com/hudson/view/EAP-native/job/eap5-native-connectors-solaris-ews/2/jdk=java16_default,label=native-solaris10-sparc/
unzip -l jboss-ep-native-5.1.0-solaris10-sparc64.zip | grep sasl
0 06-11-10 01:47 jboss-ep-5.1/native/include/sasl/
1368 06-11-10 01:47 jboss-ep-5.1/native/include/sasl/hmac-md5.h
1442 06-11-10 01:47 jboss-ep-5.1/native/include/sasl/md5.h
1086 06-11-10 01:47 jboss-ep-5.1/native/include/sasl/md5global.h
49845 06-11-10 01:47 jboss-ep-5.1/native/include/sasl/sasl.h
32920 06-11-10 01:47 jboss-ep-5.1/native/include/sasl/saslplug.h
2648 06-11-10 01:47 jboss-ep-5.1/native/include/sasl/saslutil.h
7273 06-11-10 01:47 jboss-ep-5.1/native/include/sasl/prop.h