The C compiler’s readme file highlights important information about the compiler. It is now part of the What's New in Oracle Solaris Studio 12.2 guide and includes:
Information discovered after the manuals were printed
New and changed features
Problems and workarounds
Limitations and incompatibilities
Go to the Oracle Solaris Studio 12.2 documentation page at http://www.oracle.com/technetwork/server-storage/solarisstudio/documentation .to find the What's New guide.