Chapter 5. Changes in LLVM Toolset

LLVM Toolset has been updated from version 15.0.7 to 16.0.6 on RHEL 8 and RHEL 9. Notable changes include:

Improvements to optimization
Support for new CPU extensions
Improved support for new C++ versions

Notable backwards incompatible changes include:

Clang’s default C++ standard is now gnu++17 instead of gnu++14.
The -Wimplicit-function-declaration, -Wimplicit-int and -Wincompatible-function-pointer-types options now default to error for C code. This might affect the behavior of configure scripts.

By default, Clang 16 uses the libstdc++ library version 13 and binutils 2.40 provided by GCC Toolset 13.

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