[ATfE] Add CMake Build Options for Multiple C Libraries#687
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- Add enable flags per libc
- Fix COPYING.NEWLIB error when creating the atfe package - Fix samples related issue
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- Replace the single LLVM_TOOLCHAIN_C_LIBRARY option with independent per-library toggles, allowing ATfE to build and package multiple C libraries such as: picolibc, newlib, newlib-nano and llvmlibc in a single build. - Add new per-library CMake options: a) LLVM_TOOLCHAIN_ENABLE_PICOLIBC, b) LLVM_TOOLCHAIN_ENABLE_NEWLIB c) LLVM_TOOLCHAIN_ENABLE_NEWLIB_NANO, and d) LLVM_TOOLCHAIN_ENABLE_LLVMLIBC as independent ON/OFF toggles. Note that picolibc defaults to ON. - Deprecate LLVM_TOOLCHAIN_C_LIBRARY. --------- Co-authored-by: Hugo Silva <hugsan02@e142605.arm.com> (cherry picked from commit bc86d60)
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- Replace the single LLVM_TOOLCHAIN_C_LIBRARY option with independent per-library toggles, allowing ATfE to build and package multiple C libraries such as: picolibc, newlib, newlib-nano and llvmlibc in a single build. - Add new per-library CMake options: a) LLVM_TOOLCHAIN_ENABLE_PICOLIBC, b) LLVM_TOOLCHAIN_ENABLE_NEWLIB c) LLVM_TOOLCHAIN_ENABLE_NEWLIB_NANO, and d) LLVM_TOOLCHAIN_ENABLE_LLVMLIBC as independent ON/OFF toggles. Note that picolibc defaults to ON. - Deprecate LLVM_TOOLCHAIN_C_LIBRARY. --------- Co-authored-by: Hugo Silva <hugsan02@e142605.arm.com> (cherry picked from commit bc86d60)
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