The weak variable attribute

The weak variable attribute causes the symbol resulting from the variable declaration to appear in the object file as a weak symbol, rather than a global one. The language feature provides the programmer writing library functions with a way to allow variable definitions in user code to override the library declaration without causing duplicate name errors.

weak variable attribute syntax
 
>>-__attribute__--((--+-weak-----+--))-------------------------><
                      '-__weak__-'
 

Related information

• #pragma weak in the ILE C/C++ Compiler Reference
• The weak function attribute