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2021-04-13etcpak: Fix handling of pthread naming API for Linux and MinGWRémi Verschelde
For MinGW this is tricky to do as a two-step process like it was implemented, as `std::thread::native_handle()` is implementation-defined and depending on the MinGW distribution, it may or may not be a pthread handle. With mingw-gcc as packaged in Linux distros with pthread support it worked fine, but with llvm-mingw it was problematic. Setting the name in the thread directly as done for Apple platforms is simpler and works fine. Co-authored-by: Hein-Pieter van Braam-Stewart <hp@tmm.cx>
2021-04-13Add `etcpak` library for faster ETC/ETC2/S3TC imports.K. S. Ernest (iFire) Lee
- `etc` module was renamed to `etcpak` and modified to use the new library. - PKM importer is removed in the process, it's obsolete. - Old library `etc2comp` is removed. - S3TC compression no longer done via `squish` (but decompression still is). - Slight modifications to etcpak sources for MinGW compatibility, to fix LLVM `-Wc++11-narrowing` errors, and to allow using vendored or system libpng. Co-authored-by: Rémi Verschelde <rverschelde@gmail.com>