[Insight-developers] template depth limit

[Ross Whitaker]

Not to sound "anti-template" (even though I have never used them, right
Bill!) ---

But should we reconsider an architecture which relies on such depth of
templates?  It makes me a little uncomfortable.   Does anyone see a
problem with this?

Regards,

Ross

Lydia Ng wrote:

> A few days ago I checked in multi resolution version
> of the rigid mutual information registration.
>
> This new class has manage to exceed the gcc default
> template depth limit of 17. This is why the associated
> test is failing to compile on Linux and SunOS platforms.
>
> The template depth limit can be increase to NN via flag
>   -ftemplate-depth-NN
>
> I have experimented with this on Cygwin by setting
> the CMAKE_CXX_FLAGS in the CMakeCache.txt
>
> CMAKE_CXX_FLAGS:STRING=-g -O2 -ftemplate-depth-20
>
> I re-ran CMake and the test compiled and passed.
>
> So:
>
> 1) Should we increase this depth by default for ITK
> by setting the flag in some configuration file.
>
> 2) If so, what value should we increase it to.
> Also what is the impact in increasing it.
>
> Cheers,
> Lydia
>

--
Ross T. Whitaker, Assistant Professor
50 S. Central Campus Drive, Rm. 3190
University of Utah
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web: www.cs.utah.edu/~whitaker