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BPABI and SysV shared libraries and executables
10.20 Automatic dynamic symbol table rules in the BPABI DLL-like model
10.20.1 See also
The following rules apply to the Base Platform Application Binary Interface (BPABI) DLL-like
model:
Executable An undefined symbol reference is an undefined symbol error.
Global symbols with STV_HIDDEN or STV_INTERNAL visibility are never exported to
the dynamic symbol table.
Global symbols with STV_PROTECTED or STV_DEFAULT visibility are not exported to
the dynamic symbol table unless --export_all or --export_dynamic is set.
DLL An undefined symbol reference is an undefined symbol error.
Global symbols with STV_HIDDEN or STV_INTERNAL visibility are never exported to
the dynamic symbol table.
Note
STV_HIDDEN or STV_INTERNAL global symbols that are required for relocation can be
placed in the dynamic symbol table, however the linker changes them into local
symbols to prevent them from being accessed from outside the shared library.
Global symbols with STV_PROTECTED or STV_DEFAULT visibility are always exported
to the dynamic symbol table.
You can manually export and import symbols using the EXPORT and IMPORT steering file
commands. Use the --edit command-line option to specify a steering file command.
Concepts
• What is a steering file? on page 7-23
Reference
• Steering file command summary on page 7-25
• Steering file format on page 7-26.
Linker Reference:
• --edit=file_list on page 2-53
• --export_all, --no_export_all on page 2-64
• --export_dynamic, --no_export_dynamic on page 2-65
• --keep_protected_symbols on page 2-91
• EXPORT on page 3-2
• IMPORT on page 3-4.
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