LLVM 11.0.0
Fedora 33 viene con LLVM 11.
Todos los subproyectos llvm en Fedora serán actualizados a la versión 11. Sin embargo, los paquetes que dependen actualmente en las bibliotecas clang y llvm versión 10 seguirán funcionando.
Compatibility packages clang10 and llvm10 was added to this release.
If the maintainers want to rebuild packages that depend on clang-libs or llvm-libs, but do not work with LLVM 11 yet, they have to change their spec files to depend on the clang10 and llvm10 compatibility packages.
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 Compatibility package naming change. The .0 was dropped from the package name and now the compatibility packages are called   | 
Clang 11.0.0 supports the -fstack-clash-protection flag for the x86_64 and s390x architectures. As part of this update, the rpmrc file in redhat-rpm-config was modified, so -fstack-clash-protection is added to optflags when the %toolchain macro is set to clang.
Cambios
The full list of new features, improvements and bug fixes that comes with LLVM 11 can be found in the upstream release notes.
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