The IMPORT command specifies that a symbol is defined in a shared object at runtime.
Note
A symbol can be imported only if the reference has STV_DEFAULT visibility.
You must use the --override_visibility command-line
option to enable the linker to override symbol visibility to STV_DEFAULT.
SyntaxIMPORT pattern [ AS replacement_pattern] [ ,pattern [ AS replacement_pattern]]
where:
patternIs a string, optionally including wildcard characters (either
*or?), that matches zero or more undefined global symbols. Ifpatternreplacement_patternIs a string, optionally including wildcard characters (either
*or?), to which the symbol is to be renamed. Wild characters must have a corresponding wildcard inpatternpatternreplacement_patternFor example:
IMPORT my_func AS funcimports and renames the undefined symbol
my_funcasfunc.
You cannot import a symbol that has been defined in the current
shared object or executable. Only one wildcard character (either * or ?)
is permitted in IMPORT.
The undefined symbol is included in the dynamic symbol table
(as replacement_patternpattern
Note
The IMPORT command only affects undefined global symbols. Symbols that have been resolved by a shared library are implicitly imported into the dynamic symbol table. The linker ignores any IMPORT directive that targets an implicitly imported symbol.
- Concepts
Using the Linker:
- Reference
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