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I am fantastic on Linux kernel and on Clang compiler. This article teaches me what GNU extension characteristic will be when Linux kernel is accepting more mode

I am fantastic on Linux kernel and on Clang compiler. This article teaches me what GNU extension characteristic will be when Linux kernel is accepting more modern C11 standard. For example, Linux kernel use local labels, inline assembly and builtin functions heavily. This article inspires me to persist studying in Linux kernel and Clang compiler.

jcalvinowens 2y ago
Clang supports the extensions, you can build the Linux kernel with clang today: make -s LLVM=1
e63f67dd-065b 2y ago
As sibling mentioned, you can build the kernel with clang today. `make CC=clang`, and for whatever reason I've found that it produces code that's significantly more pleasant to step through under a debugger than gcc. If anybody has an explanation for this I'd love to hear it.
- MaskRay 2y ago
  Interesting. Traditionally, Clang's -O1 and higher optimizations have been considered less debuggable than GCC's. Sony developers have proposed changes to improve the debugging experience and some work has been done, e.g. https://discourse.llvm.org/t/rfc-redefine-og-o1-and-add-a-new-level-of-og/72850 https://discourse.llvm.org/t/rfc-redefine-og-o1-and-add-a-ne... * change representation to help make -g not change codegen : https://discourse.llvm.org/t/rfc-debuginfo-proposed-changes-to-the-textual-ir-representation-for-debug-values/73491 https://discourse.llvm.org/t/rfc-debuginfo-proposed-changes-...