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clang20 and MSAN environment for cmake-re#41

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daminetreg wants to merge 12 commits intomainfrom
feature/msan-example-cppcon2025
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clang20 and MSAN environment for cmake-re#41
daminetreg wants to merge 12 commits intomainfrom
feature/msan-example-cppcon2025

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This introduces a cmake-re environment with clang20 that can be used for C++23 compilation or for MSAN instrumentation

It provides an environment that has multiple CMAKE_TOOLCHAIN_FILE that enables uses of the MSAN instrumentation on the complete stack, by also providing an instrumented libc++.

For example use, see https://github.com/tipi-build/example-cmake-re-sanitizers

  • Relates to tipi-build/specs-cmake-re#242

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