The secure directory from which files can be preloaded is now /usr/lib/secure for 32-bit objects and /usr/lib/secure/64 for 64-bit objects. See "Security".
Greater flexibility in modifying the runtime linker's search paths can be achieved with the link-editor's -z nodefaultlib option, and runtime configuration files created by the new utility crle(1). See "Directories Searched by the Runtime Linker" and "Configuring the Default Search Paths".
The new extern mapfile directive enables you to use -z defs with externally defined symbols. See "Defining Additional Symbols".
The new $ISALIST, $OSNAME, and $OSREL dynamic string tokens provide greater flexibility in establishing instruction set specific, and system specific dependencies. See "Dynamic String Tokens".
The link-editor options -p and -P provide additional means of invoking runtime link auditing libraries. See "Recording Local Auditors". The runtime link auditing interfaces la_activity() and la_objsearch() have been added. See "Audit Interface Functions".
A new dynamic section tag, DT_CHECKSUM, enables you to coordinate ELF files with core images. See Table 7-42.