[Qt-creator] Theory of Operation question concerning configurations

Jonathan S. Shapiro shap at eros-os.org
Thu May 31 19:11:32 CEST 2012

On Wed, May 30, 2012 at 4:28 PM, Konstantin Tokarev <annulen at yandex.ru>wrote:

> Use -fPIC, Luke :)
> --
> Regards,
> Konstantin

I think you are kidding, but just in case you are not...

There are target environments where -fPIC/-fpic are not supported. There
are other target environments where the runtime overhead of
position-independent code is very substantial.

In target environments that support shared libraries, object files produced
with -fPIC (or equivalent) can *usually* be used in a static library for
the same environment, but there is a significant loss of efficiency.

For this reason, it is a nearly universal convention to compile library
source files twice: once for position-independent shared use and the other
for position-dependent linkage.

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