6.6.2 Steering file command summary

Steering file commands enable you to manage symbols in the symbol table, control the copying of symbols from the static symbol table to the dynamic symbol table, and store information about the libraries that a link unit depends on.

For example, you can use steering files to protect intellectual property, or avoid namespace clashes.

The steering file commands are:

Table 6-6 Steering file command summary

Command Description
EXPORT Specifies that a symbol can be accessed by other shared objects or executables.
HIDE Makes defined global symbols in the symbol table anonymous.
IMPORT Specifies that a symbol is defined in a shared object at runtime.
RENAME Renames defined and undefined global symbol names.
REQUIRE Creates a DT_NEEDED tag in the dynamic array. DT_NEEDED tags specify dependencies to other shared objects used by the application, for example, a shared library.
RESOLVE Matches specific undefined references to a defined global symbol.
SHOW Makes global symbols visible. This command is useful if you want to make a specific symbol visible that is hidden using a HIDE command with a wildcard.

Note:

The steering file commands control only global symbols. Local symbols are not affected by any of these commands.
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