-shared

[Ryan Schmidt]

On Aug 6, 2010, at 19:27, 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.
> 
> Can anyone confirm that -shared will just be ignored by Apple gcc and thereby be safe in our MacPorts environment?

My recollection is that -shared is ignored by Snow Leopard's compiler but it throws a fatal error on Leopard's. If that's true, you'll want to remove -shared for compatibility. If you can't test on Leopard, send me a portfile and I can.