shared objects

[lara]

Hi,

Is there a way to find whether an object(.o file ) is compiled with -pic or not.

Regards,
Lara

[Stuart Browne]

Not 100% sure I'm afriad, but by doing some tests locally, using '-fPIC' (as '-pic' using a modern gcc doesn't work), with the tool 'readelf', a -fPIC binary has references to "_GLOBAL_OFFSET_TABLE_", where as an object compiled without -fPIC doesn't..

I've not done enough programming to actually know what '-pic' or '-fPIC' are supposed to do..

[lara]

Seems to be not neccessarly true. Anyway thanks for your suggestion.

Lara

[lara]

Seems to be not necessarly true. Anyway thanks for your suggestion.

Lara

[Umapathy S]

Lara,
I dont have a linux box nearby to test it. But in hpux the file command gives out "relocatable" for position independent code. As you might be aware for the shared libs you need to have PIC.
Just compile a c file both ways and test it on the box.

HTH,
Umapathy

[lara]

Umapathy,

relocatable need not necessarly mean the object file has position independent code.

Lara