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If the problem turns out to be an inability to locate or load the necessary libraries when running a test program, you may have a path issue. Sometimes, particularly on non-Linux systems, you'll have to set a LD_LIBRARY_PATH (or similar) variable to allow the link tests to succeed, just as you will often need to set the variable at runtime when using the software.
Shibd Apache Module
If you compiled your Shibd Apache module (e.g. mod_shib_22.so) under Solaris, it may occur that it can't be loaded because libstlport.so.1 is missing. The library is located under your Solarisstudio installaion path in "prod/lib/stlport4". The easiest way is to copy it to your Shibboleth SP lib directory.