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From Egor Pasko <egor.pa...@gmail.com>
Subject Re: [general] which version of gcc to use for distributables?
Date Thu, 21 Dec 2006 11:17:01 GMT
On the 0x246 day of Apache Harmony Gregory Shimansky wrote:
> Egor Pasko wrote:
> > On the 0x245 day of Apache Harmony Geir Magnusson, Jr. wrote:
> >> There's been some comment on the fact that I'm using GCC v4.x for the
> >> em64t builds, requiring users of the snapshot to use libstdc++ v6.
> >>
> >> Is this a real problem?  Shouldn't we be using the newest major
> >> version of gcc for our builds?
> > I found a relatively simple approach in [1] (but supposedly not
> > universal):
> > shell> ln -s `g++ -print-file-name=libstdc++.a`
> > shell> g++ -static-libgcc -L. -o example example.cpp
> > works on my em64t on a simple test. Modifying the build is quing to
> > be
> >  somewhat painful. Volunteers wecome!
> > [1] Linking libstdc++ statically
> >     http://www.trilithium.com/johan/2005/06/static-libstdc/
> >
> 
> I am afraid we'll hit the same problem with static linking on x86_64
> as we had with static libjpeg, libpng and liblcms. The libstdc++.a
> library in most distributions is likely built without -fPIC because it
> is required only for shared libraries.

yes, you are right! we need libstdc++.a with -fPIC
but it is not for development, just to make binary releases and
snapshots. Yet, probably, too much...

another alternative is 2 versions of each linux snapshot.. which I do
not like

> While it is usually possible to create a shared library on x86 linking
> it against static libraries built without -fPIC on x86, on x86_64 it
> seems to just never work.
> 
> The solution for classlib natives which need libjpeg, libpng and
> liblcms libraries could be to have our own specially compiled static
> libraries which are built with -fPIC. But now if we'll need a special
> build of gcc, it may be too much.
> 
> -- 
> Gregory
> 
> 

-- 
Egor Pasko


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