680a80d61c
This change uses a symbol map to hide PugiXML symbols from MaterialX libraries when dependencies are built. This avoids conflict with symbols from pugixml.a used by Blender for the Grease Pencil SVG exporter. The root cause of the conflict has been addressed upstream: https://github.com/AcademySoftwareFoundation/MaterialX/pull/1944 However, the patch does not cleanly apply on 1.38, and it not cleat when the next 1.39 is released. Additional complication is that reportedly USD does not yet support MaterialX 1.39. This fix is only for Linux. Similar thing can be applied on macOS, however so far I could not reproduce the issue on macOS. Ref #124173 Pull Request: https://projects.blender.org/blender/blender/pulls/126518
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