Question related to -fPIC behaviour across architectures

Florian Weimer
Tue May 3 14:29:58 GMT 2022

* vincent Dupaquis:

> - Did I miss anything ?

The linker can perform relaxations (e.g., elimination of GOT
indirection) based on whole-program analysis, something the compiler
cannot do.  Such optimizations are very much target-dependent, and they
often need some previous ABI work to define new relaxable relocations
for relocatable object files.

> - Is there somewhere a common definition of what mean PIC for the
>   different architectures ?

Not really, not even for ELF.  There are some common assumptions in the
background for ELF implementations (e.g., one canonical function
address), but how you get there varies somewhat.


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