[Help wanted]: can I use g++ with clangd?

I use lsp-mode && c++. For some reason, my project can only built with g++. But I use clangd as lsp server. I found that there's a parameter called "query-driver", would it take effect if I use g++ as query driver? What's more, in compile_commands.json file, I replace the compiler clang++ with g++, will it bother?

I would ask that question in clangd's discord channel.

Yes you can. They are not mutually exclusive

I use clangd with gcc (not g++, but same toolchain) every day in an embedded context. It works fine. clangd is supposed to adapt itself to the compiler used as defined in the compilation database (compile_commands.json). In an embedded context, I had an issue with a gcc option clangd didn't understand. You can deal with this easily using a `.clangd` configuration, mine contain for example: CompileFlags: Remove: -f* This remove all the optimization options (including the problematic one), the ones starting with "-f". They're not useful for LSP functions and some may be problematic. But overall the clang and clangd have very good compatibility with the GCC toolchain. Hope that helps, if it's really C++ specific there may be other "gotcha" I don't know about.

> But I use clangd as lsp server. That is fine, but know that the warnings, errors, etc., the LSP generates will come from clang. It will not run gcc. > I found that there's a parameter called "query-driver", would it take effect if I use g++ as query driver? This is only about asking gcc where the system headers are, so clangd can find them. See https://clangd.llvm.org/guides/system-headers > What's more, in compile_commands.json file, I replace the compiler clang++ with g++, will it bother? clangd will ignore that change completely and always use itself as the "compiler".

Thanks. You said "I had an issue with a gcc option clangd didn't understand", what does it mean? Will clangd report some error?

Perfect answer! So clangd just ignore my g++ compiler🤣

It was quite some time ago and I forgot the specifics... But I had to add this filtering clangd configuration to get a smooth operation.

Yeah probably also ignores any GCC ism's.

I wouldn't advice discord with all the privacy issues. The IRC or Matrix channel would be better I think.

Do they have irc/matrix channels?

i have one more question. If i don't have clang && clang++ installed, how could clangd use clang?

You can't clangd depends on clang.

I mean if there's only gcc&&g++ on my linux system, how could clangd provide the functionality like semantic checking?

You can't clangd depends on libclang.