[Insight-developers] itk/gdcm build errors on Fedora 12

[Mathieu Malaterre]

On Thu, Nov 19, 2009 at 9:57 PM, kent williams
<norman-k-williams at uiowa.edu> wrote:
> I know why the problem is happening, but I'm not sure how to fix it for
> Arnaud.
>
> Betweeen Fedora Core 11 and Fedora Core 12, they started using the OSSP
> library for UUID management.
>
> http://www.ossp.org/pkg/lib/uuid/
>
> The OSSP dudes decided that it would be better if the UUID type was opaque,
> which is "Good Software Engineering." If you use this library, instead of
> doing this:
>
> uuid_t g;
> uuid_generate(g)
>
> You do this:
>
> uuid_t *g;
> uuid_create(&g);
>
> Now the unfortunate thing for Arnaud -- and any other Fedora Core 12 users
> with the crazy idea they might use ITK -- is that there's a DIFFERENT uuid
> API apparently that has a function with this signature:
>
> uuid_i g;
> uuid_rc_t t;
> uuid_create(&g,&rv);
>
> Which means basically if you use Fedora Core 12, or any other system that
> has adopted OSSP UUID as its uuid library, you're screwed.
>
> At any rate GDCM 1.x is never going to work with this library without some
> hacking because it assumes that it can always generate a UUID and that it
> will fit in a 16 byte character array.  OSSP doesn't really help out much
> there -- I see no function that will give you a UUID as a 16 byte array.

I have not check, but there are two major UUID library (in *NIX)
world. The one on linux/macosx I had been playing with and one in the
FreeBSD world, which I never got access to. if you grep GDCM (1.x, 2x.
?) code, you'll see I should be able to use either signature the
uuid_generate or uuid_create.

2cts
-- 
Mathieu