[arch-general] Meshroom/OpenEXR: Missing lmath library

[Peter Nabbefeld]

Hello,

I want to install "meshroom-git" from the AUR, which fails. After some
investigations, I found out, openEXR 3.x is missing the lmath library,
which was bundled in versions 2.x (see
https://github.com/AcademySoftwareFoundation/openexr/blob/master/README.md#openexr-and-imath-version-3).

What will be my best option to get the meshroom build working?

Kind regards

Peter