OpenNebula

i forgot the mention that the problematic SConstruct file is the one located in the root directory (the same directory with install.sh).

this is more snippet about the part that generates this issue:
125 if not main_env.GetOption('clean'):
126 try:
127 main_env.ParseConfig('share/scons/get_xmlrpc_config server')
128 main_env.ParseConfig('share/scons/get_xmlrpc_config client')
129
130 if mysql=='yes':
131 main_env.ParseConfig('mysql_config --cflags --libs')
132
133 except Exception, e:
134 print ""
135 print "Error searching for xmlrpc-c libraries. Please check this"+\
136 " things:"
137 print ""
138 print " * You have installed development libraries for xmlrpc-c. One"+\
139 " way to check"
140 print " this is calling xmlrpc-c-config that is provided with the"+\
141 " development"
142 print " package."
143 print " * Check that the version of xmlrpc-c is at least 1.06. You"+\
144 " can do this also"
145 print " calling:"
146 print " $ xmlrpc-c-config --version"
147 print " * If all this requirements are already met please send log"+\
148 " files located in"
149 print " .xmlrpc_test to the mailing list."
150 print ""
151 exit(-1)

line 130 and 131 may generate mysql error but the exception was hardcoded to display xmlrpc error only.