Am 16.08.2014 14:00, schrieb James Holsenback:

> following up on the notion that it's compiler/configure related, I did a
> comparison of configure output the buildbot server and my system!

Does the buildbot-generated binary render the scene ok?

> This 1st output is from the buildbot server ...
>
> gcc (Ubuntu/Linaro 4.8.1-10ubuntu9) 4.8.1:
>
> Just a few entries of interest here /not/ all of them ... compare them
> with below output!
>
> Language constructs and functions
> ---------------------------------
> checking size of int... 4
> checking size of long int... 8
> checking size of size_t... 8
> checking size of float... 4

That's typical for a 64-bit machine.

> Floating Point Features
> -----------------------
> checking limits usability... yes
> checking limits presence... yes
> checking for limits... yes
> checking whether NaNs are supported... yes
> checking cmath usability... yes
> checking cmath presence... yes
> checking for cmath... yes
> checking whether NaNs can be identified using std::isnan()... no
> checking whether NaNs can be identified using global isnan()... no
> checking whether NaNs can be identified by comparison to themselves... no
> checking whether infinite values are supported... yes
> checking for cmath... (cached) yes
> checking whether infinities can be identified using std::isinf()... no
> checking whether infinities can be identified using global isinf()... no
> checking whether infinities can be identified by comparison to the
> maximum value... yes

That's typical for g++ with floating-point optimizations enabled.

> ------
>
> This output is from my system ...
>
> gcc (SUSE Linux) 4.6.2:
>
> Compare to above buildbot output ...
>
> Language constructs and functions
> ---------------------------------
> checking size of int... 4
> checking size of long int... 4
> checking size of size_t... 4
> checking size of float... 4

That's typical for a 32-bit machine.

> Did /not/ even have "Floating Point Features" section on my system!!!

That's perfectly normal for any version prior to commit f1699ea.

> The plot thickens? mkl?

No plot-thickening yet.

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