Robert Osfield wrote:
> The errors don't make any sense to me, the line is:
>
>
> inline float log2(float v) { return logf(v) * static_cast<float>(INVLN_2);
}
>
> And the error you get is:
>
> /usr/src/OpenSceneGraph/include/osg/Math:197: error: expected `)'
> before '/' token
> /usr/src/OpenSceneGraph/include/osg/Math:197: error: expected `,' or
> `;' before '/' token
>
> It's like the compiler is treating the definition of INVLN_2 as a
> macro not a const double. The definition of INVLN_2 is near the top
> of include/osg/Math :
>
> const double LN_2 = 0.69314718055994530942;
> const double INVLN_2 = 1.0 / LN_2;
>
> This really looks like a bug in the compiler. Perhaps changing the
> above be a hardwired value i.e. const double INVLN_2 = 1.442... might
> get around this bug, could you try this?
>
> Robert.
I tried the change you suggested but no go. I think it might be deeper in
/usr/include/math.h where they do a define on log2 and log2f as follows
but....
#define log2(x) (log(x) / M_LOG2_E)
#define log2f(x) (logf(x) / (float) M_LOG2_E)
not sure.
bk
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