[PATCH bpf] samples/bpf: Update README.rst for manually compiling LLVM and clang
From: Tiezhu Yang <yangtiezhu@loongson.cn>
Date: 2021-01-18 08:54:59
Also in:
bpf, lkml
Subsystem:
bpf [general] (safe dynamic programs and tools), the rest · Maintainers:
Alexei Starovoitov, Daniel Borkmann, Andrii Nakryiko, Eduard Zingerman, Kumar Kartikeya Dwivedi, Linus Torvalds
In the current samples/bpf/README.rst, the url of llvm and clang git may be out of date, they are unable to access: $ git clone http://llvm.org/git/llvm.git Cloning into 'llvm'... fatal: unable to access 'http://llvm.org/git/llvm.git/': Maximum (20) redirects followed $ git clone --depth 1 http://llvm.org/git/clang.git Cloning into 'clang'... fatal: unable to access 'http://llvm.org/git/clang.git/': Maximum (20) redirects followed The Clang Getting Started page [1] might have more accurate information, I verified the procedure and it is proved to be feasible, so we should update it to reflect the reality. [1] https://clang.llvm.org/get_started.html Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn> --- samples/bpf/README.rst | 8 +++----- 1 file changed, 3 insertions(+), 5 deletions(-)
diff --git a/samples/bpf/README.rst b/samples/bpf/README.rst
index dd34b2d..f606c08 100644
--- a/samples/bpf/README.rst
+++ b/samples/bpf/README.rst@@ -65,11 +65,9 @@ To generate a smaller llc binary one can use:: Quick sniplet for manually compiling LLVM and clang (build dependencies are cmake and gcc-c++):: - $ git clone http://llvm.org/git/llvm.git - $ cd llvm/tools - $ git clone --depth 1 http://llvm.org/git/clang.git - $ cd ..; mkdir build; cd build - $ cmake .. -DLLVM_TARGETS_TO_BUILD="BPF;X86" + $ git clone https://github.com/llvm/llvm-project.git + $ cd llvm-project; mkdir build; cd build + $ cmake -DLLVM_ENABLE_PROJECTS=clang -DLLVM_TARGETS_TO_BUILD="BPF;X86" -G "Unix Makefiles" ../llvm $ make -j $(getconf _NPROCESSORS_ONLN) It is also possible to point make to the newly compiled 'llc' or
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2.1.0