-shared

[Bradley Giesbrecht]

On Aug 6, 2010, at 5:27 PM, Bradley Giesbrecht wrote:

> I read that -shared is ignored by Apples gcc compiler.
>
> man gcc says not supported.
> ...
> -shared
>           Produce a shared object which can then be linked with  
> other objects to form an executable.  Not all systems support this  
> option.  For predictable
>           results, you must also specify the same set of options  
> that were used to generate code (-fpic, -fPIC, or model suboptions)  
> when you specify this
>           option.[1]
>
>           This option is not supported on Mac OS X.
> ...
>
> The final command of my port looks like this and the result seems to  
> be working.
>
> cc -c -dynamiclib -fno-common -undefined dynamic_lookup -fPIC - 
> shared -Wall -Wextra ......
>
> I can patch the -shared out but if it is safely ignored I'd rather  
> not because I'm trying to get a patch excepted upstream and for some  
> to other lines and would rather have as little impact as necessary.

Good grief, "trying to get a patch accepted upstream" :)

> Can anyone confirm that -shared will just be ignored by Apple gcc  
> and thereby be safe in our MacPorts environment?
>
>
> Regards,
> Bradley Giesbrecht
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> macports-dev at lists.macosforge.org
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