Re: finding isnan

[Joerg Sonnenberger <joerg%bec.de@localhost>]

On Monday, November 6, 2023 12:21:49 AM CET Thomas Klausner wrote:
> Hi!
> 
> math/py-scikit-learn currently doesn't build because it doesn't find
> 'isnan'.
> 
> As I understand it, that symbol should be available for C++ files from
> C++11 onwards, so I tried adding 'c++11' to USE_LANGUAGES, but that
> didn't help, even though -std=c++11 ended up on the compiler line.
> 
> http://www.ki.nu/pkgsrc/reports/current/NetBSD-9.0/20231104.1950/py310-scikit-learn-1.3.2/build.log

If it is including cmath, it should be using std::isnan. If it is mixing math.h and cmath,
it should stop doing that, ideally by including cmath first.

Joerg