clangd can’t find standard library headers

[mickey298]

OS

ubuntu 22 内核：5.15.0

neovim

$ nvim -v
NVIM v0.8.1
Build type: Release
LuaJIT 2.1.0-beta3
Compiled by runner@fv-az178-366

Features: +acl +iconv +tui
See ":help feature-compile"

   system vimrc file: "$VIM/sysinit.vim"
  fall-back for $VIM: "/share/nvim"

Run :checkhealth for more info

checkhealth

• OK: neovim version >= 0.7.0
  23 - OK: Go: go version go1.18.1 linux/amd64
  22 - OK: cargo: cargo 1.65.0 (4bc8f24d3 2022-10-20)
  21 - WARNING: luarocks: not available
  20 - WARNING: Ruby: not available
  19 - WARNING: RubyGem: not available
  18 - WARNING: Composer: not available
  17 - WARNING: PHP: not available
  16 - OK: npm: 6.14.8
  15 - OK: node: v14.9.0
  14 - OK: python3: Python 3.10.6
  13 - OK: pip3: pip 22.0.2 from /usr/lib/python3/dist-packages/pip (python 3.10)
  12 - OK: javac: javac 18.0.2-ea
  11 - OK: java: openjdk version "18.0.2-ea" 2022-07-19
  10 - WARNING: julia: not available
  9 - OK: wget: GNU Wget 1.21.2 在 linux-gnu 上编译。
  8 - OK: curl: curl 7.81.0 (x86_64-pc-linux-gnu) libcurl/7.81.0 OpenSSL/3.0.2 zlib/1.2.11 ↳ brotli/1.0.9 zstd/1.4.8 libidn2/2.3.2 libpsl/0.21.0 (+libidn2/2.3.2) libssh/0.9.6/openssl/zlib ↳ nghttp2/1.43.0 librtmp/2.3 OpenLDAP/2.5.13
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  4 - OK: bash: GNU bash，版本 5.1.16(1)-release (x86_64-pc-linux-gnu)
  3 - OK: sh: Ok
  2 - OK: python3_host_prog: Python 3.10.6
  1 - OK: python3_host_prog pip: pip 22.0.2 from /usr/lib/python3/dist-packages/pip (python 3.10)
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packersync

所有都是already up to date

其他

使用

if command -v curl >/dev/null 2>&1; then
    bash -c "$(curl -fsSL https://raw.githubusercontent.com/ayamir/nvimdots/HEAD/install/install.sh)"
else
    bash -c "$(wget -O- https://raw.githubusercontent.com/ayamir/nvimdots/HEAD/install/install.sh)"
fi

安装后一切都保持默认

问题

1

c/cpp的头文件找不到，同时也没有自动补全

2

lsplog错误

同时打开时间久了后出现轻微的卡顿。

logfile

lsp.log

1 我想问下默认安装后还需不要单独配置某种语言（默认支持哪些？）
2 如何配置？

万分感谢！

[Jint-lzxy]

c/cpp的头文件找不到，同时也没有自动补全

• That's weird. First, you’ll need the standard library (and any other libraries you depend on) installed on your system. Even if you don’t actually build on this machine, clangd needs to parse the headers (which means you need to install the latest version of any modern C++ compiler on your machine). You should then set the compiler you desire here:
  

  nvimdots/lua/modules/completion/lsp.lua

  Lines 121 to 122 in 71ae7c6

  	-- You MUST set this arg ↓ to your c/cpp compiler location (if not included)!
  	"--query-driver=/usr/bin/clang++,/usr/bin/**/clang-*,/bin/clang,/bin/clang++,/usr/bin/gcc,/usr/bin/g++",

• The standard library headers are often found relative to the compiler. Try start clangd with "--log=verbose", (append in this table). This can tell you the cc1 command, including which paths were searched for the standard library. You can then compare this to the output of clang -### <args> to see if the search path is missing. Often the standard library headers are not found because the include folder is not in the search path of the compiler. You may use the CPATH environment variable to adjust the global search path, for example:

export CPATH="${CPATH}:/usr/local/include"

• Besides, in order to better configure clangd, you could provide a config file. See fix(clangd[lsp]): Args aren't being passed correctly. #193 (comment) for more information. Looks like some features you need would be supported by a newer C++ standard. You can also set it here with:

CompileFlags:
  Add: [-std=c++??]

---

1 我想问下默认安装后还需不要单独配置某种语言（默认支持哪些？） 2 如何配置？

• Neovim offers IDE-like features such as real-time diagnostics and goto definitions through communicating with the language server protocol (LSP, click to read more!). The pre-configured language servers (by default) can be found here (a.k.a, gopls, sumneko_lua, clangd, jsonls, efm, html-languageserver). But you still need to install the corresponding executable! Only the configuration is provided here.
  • In neovim instances, you can use :Mason to download any language server, while the global LSPs can be installed using your favorite package manager. When you open a file, neovim will spawn the corresponding executable(s) according to the filetype deduced.
• We use nvim-lspconfig to configure the language server. You can view the setup parameters supported by each language server here.
  • If you just want to use the default configuration, you don't need to modify anything - we will automatically complete the setup for you, just ensure that the executable has been installed 👍
  • If you need custom setup, a general template is (append here):

elseif server == "DESIRED_SERVER_NAME" then
	nvim_lsp.DESIRED_SERVER_NAME.setup({
		capabilities = capabilities,
		on_attach = custom_attach,
		settings = {--[[Your setup table--]]},
	})

• Also, FYI the code formatting feature is provided by efm. You would also need to use :Mason or a package manager to install the corresponding executables and set it here according to the file type. You can use the default configuration of efmls-configs-nvim or setup on your own! (Click link 1 and (link 2.1, link 2.2) to see example configs)

[mickey298]

@Jint-lzxy Thank you for your reply!

1

both of gcc/g++ and clang/clang++ has been installed on my machine.

$which g++
/usr/bin/g++

$which clang++
/usr/bin/clang++

2

Try to run this command,not found cc1 command

$ clangd --background-index --pch-storage=memory --query-driver=/usr/bin/clang++,/usr/bin/**/clang-*,/bin/clang,/bin/clang++,/usr/bin/gcc,/usr/bin/g++ --clang-tidy --all-scopes-completion --cross-file-rename --completion-style=detailed --header-insertion-decorators --header-insertion=iwyu --log=verbose
The flag `-cross-file-rename` is obsolete and ignored.
clangd is a language server that provides IDE-like features to editors.

It should be used via an editor plugin rather than invoked directly. For more information, see:
        https://clangd.llvm.org/
        https://microsoft.github.io/language-server-protocol/

clangd accepts flags on the commandline, and in the CLANGD_FLAGS environment variable.

I[12:53:17.264] Ubuntu clangd version 14.0.0-1ubuntu1
I[12:53:17.264] Features: linux+grpc
I[12:53:17.264] PID: 2405
I[12:53:17.264] Working directory: /home/warren
I[12:53:17.264] argv[0]: clangd
I[12:53:17.264] argv[1]: --background-index
I[12:53:17.264] argv[2]: --pch-storage=memory
I[12:53:17.264] argv[3]: --query-driver=/usr/bin/clang++,/usr/bin/**/clang-*,/bin/clang,/bin/clang++,/usr/bin/gcc,/usr/bin/g++
I[12:53:17.264] argv[4]: --clang-tidy
I[12:53:17.264] argv[5]: --all-scopes-completion
I[12:53:17.264] argv[6]: --cross-file-rename
I[12:53:17.264] argv[7]: --completion-style=detailed
I[12:53:17.264] argv[8]: --header-insertion-decorators
I[12:53:17.264] argv[9]: --header-insertion=iwyu
I[12:53:17.264] argv[10]: --log=verbose
V[12:53:17.264] User config file is /home/warren/.config/clangd/config.yaml
I[12:53:17.264] Starting LSP over stdin/stdout

but i did't found the file :/home/warren/.config/clangd/config.yaml . So i copy it from #193 (comment),
Get the same output using the above command.

The error still exists,Did i missing any thing?

PS:I will try install and config neovim on a new vm ,See if they have the same problem.post results later.

[Jint-lzxy]

but i did't found the file :/home/warren/.config/clangd/config.yaml

@mickey298 This is only to help you better configure clangd. It does not exist by default. You can view all available options here.

---

Try to run this command,not found cc1 command

You cannot use stdout of standalone clangd to view logs. You should copy "--log=verbose", to the setup table and view the logs using the lsp.log generated.

But anyway, can you first run echo '' | clang++ -v -x c++ - and paste the complete output here? I can try to confirm whether the include path is contaminated.

Example Output

Homebrew clang version 15.0.6
Target: x86_64-apple-darwin21.6.0
Thread model: posix
InstalledDir: /usr/local/opt/llvm/bin
 "/usr/local/Cellar/llvm/15.0.6/bin/clang-15" -cc1 -triple x86_64-apple-macosx12.0.0 -Wundef-prefix=TARGET_OS_ -Werror=undef-prefix -Wdeprecated-objc-isa-usage -Werror=deprecated-objc-isa-usage -emit-obj -mrelax-all --mrelax-relocations -disable-free -clear-ast-before-backend -disable-llvm-verifier -discard-value-names -main-file-name - -mrelocation-model pic -pic-level 2 -mframe-pointer=all -ffp-contract=on -fno-rounding-math -funwind-tables=2 -target-sdk-version=13.1 -fcompatibility-qualified-id-block-type-checking -fvisibility-inlines-hidden-static-local-var -target-cpu penryn -tune-cpu generic -mllvm -treat-scalable-fixed-error-as-warning -debugger-tuning=lldb -target-linker-version 820.1 -v -fcoverage-compilation-dir=<user-directory> -resource-dir /usr/local/Cellar/llvm/15.0.6/lib/clang/15.0.6 -isysroot /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk -I. -I/usr/local/include -stdlib=libc++ -internal-isystem /usr/local/opt/llvm/bin/../include/c++/v1 -internal-isystem /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/local/include -internal-isystem /usr/local/Cellar/llvm/15.0.6/lib/clang/15.0.6/include -internal-externc-isystem /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include -fdeprecated-macro -fdebug-compilation-dir=<user-directory> -ferror-limit 19 -stack-protector 1 -fblocks -fencode-extended-block-signature -fregister-global-dtors-with-atexit -fgnuc-version=4.2.1 -fcxx-exceptions -fexceptions -fmax-type-align=16 -fcolor-diagnostics -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /var/folders/jy/91xg_8j9169dydct2k4r7yw80000gn/T/--b5727a.o -x c++ -
clang -cc1 version 15.0.6 based upon LLVM 15.0.6 default target x86_64-apple-darwin21.6.0
ignoring nonexistent directory "/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/local/include"
ignoring nonexistent directory "/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/Library/Frameworks"
#include "..." search starts here:
#include <...> search starts here:
 .
 /usr/local/include
 /usr/local/opt/llvm/bin/../include/c++/v1
 /usr/local/Cellar/llvm/15.0.6/lib/clang/15.0.6/include
 /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include
 /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/System/Library/Frameworks (framework directory)
End of search list.
 "/usr/bin/ld" -demangle -lto_library /usr/local/Cellar/llvm/15.0.6/lib/libLTO.dylib -no_deduplicate -dynamic -arch x86_64 -platform_version macos 12.0.0 13.1 -syslibroot /Library/Developer/CommandLineTools/SDKs/MacOSX12.sdk -o a.out -L/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/lib /var/folders/jy/91xg_8j9169dydct2k4r7yw80000gn/T/--b5727a.o -lc++ -lSystem /usr/local/Cellar/llvm/15.0.6/lib/clang/15.0.6/lib/darwin/libclang_rt.osx.a

[mickey298]

@Jint-lzxy my fault. misunderstanding the "--log=verbose" means.

$ echo '' | clang++ -v -x c++ - -v
Ubuntu clang version 14.0.0-1ubuntu1
Target: x86_64-pc-linux-gnu
Thread model: posix
InstalledDir: /usr/bin
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/10
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/11
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/12
Selected GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/12
Candidate multilib: .;@m64
Selected multilib: .;@m64
 "/usr/lib/llvm-14/bin/clang" -cc1 -triple x86_64-pc-linux-gnu -emit-obj -mrelax-all --mrelax-relocations -disable-free -clear-ast-before-backend -disable-llvm-verifier -discard-value-names -main-file-name - -mrelocation-model pic -pic-level 2 -pic-is-pie -mframe-pointer=all -fmath-errno -ffp-contract=on -fno-rounding-math -mconstructor-aliases -funwind-tables=2 -target-cpu x86-64 -tune-cpu generic -mllvm -treat-scalable-fixed-error-as-warning -debugger-tuning=gdb -v -v -fcoverage-compilation-dir=/home/warren -resource-dir /usr/lib/llvm-14/lib/clang/14.0.0 -internal-isystem /usr/bin/../lib/gcc/x86_64-linux-gnu/12/../../../../include/c++ -internal-isystem /usr/bin/../lib/gcc/x86_64-linux-gnu/12/../../../../include/c++/x86_64-linux-gnu -internal-isystem /usr/bin/../lib/gcc/x86_64-linux-gnu/12/../../../../include/c++/backward -internal-isystem /usr/lib/llvm-14/lib/clang/14.0.0/include -internal-isystem /usr/local/include -internal-isystem /usr/bin/../lib/gcc/x86_64-linux-gnu/12/../../../../x86_64-linux-gnu/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -fdeprecated-macro -fdebug-compilation-dir=/home/warren -ferror-limit 19 -fgnuc-version=4.2.1 -fcxx-exceptions -fexceptions -fcolor-diagnostics -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /tmp/--f9bfb5.o -x c++ -
clang -cc1 version 14.0.0 based upon LLVM 14.0.0 default target x86_64-pc-linux-gnu
ignoring nonexistent directory "/usr/bin/../lib/gcc/x86_64-linux-gnu/12/../../../../include/c++/x86_64-linux-gnu"
ignoring nonexistent directory "/usr/bin/../lib/gcc/x86_64-linux-gnu/12/../../../../include/c++/backward"
ignoring nonexistent directory "/usr/bin/../lib/gcc/x86_64-linux-gnu/12/../../../../x86_64-linux-gnu/include"
ignoring nonexistent directory "/include"
#include "..." search starts here:
#include <...> search starts here:
 /usr/bin/../lib/gcc/x86_64-linux-gnu/12/../../../../include/c++
 /usr/lib/llvm-14/lib/clang/14.0.0/include
 /usr/local/include
 /usr/include/x86_64-linux-gnu
 /usr/include
End of search list.
 "/usr/bin/ld" -pie -z relro --hash-style=gnu --build-id --eh-frame-hdr -m elf_x86_64 -dynamic-linker /lib64/ld-linux-x86-64.so.2 -o a.out /lib/x86_64-linux-gnu/Scrt1.o /lib/x86_64-linux-gnu/crti.o /usr/bin/../lib/gcc/x86_64-linux-gnu/12/crtbeginS.o -L/usr/bin/../lib/gcc/x86_64-linux-gnu/12 -L/usr/bin/../lib/gcc/x86_64-linux-gnu/12/../../../../lib64 -L/lib/x86_64-linux-gnu -L/lib/../lib64 -L/usr/lib/x86_64-linux-gnu -L/usr/lib/../lib64 -L/usr/lib/llvm-14/bin/../lib -L/lib -L/usr/lib /tmp/--f9bfb5.o -lstdc++ -lm -lgcc_s -lgcc -lc -lgcc_s -lgcc /usr/bin/../lib/gcc/x86_64-linux-gnu/12/crtendS.o /lib/x86_64-linux-gnu/crtn.o
/usr/bin/ld: 找不到 -lstdc++: 没有那个文件或目录
clang: error: linker command failed with exit code 1 (use -v to see invocation)

Here is new logfile with --log=verbose
lsp.log

[Jint-lzxy]

@mickey298 Can you execute the following command to determine the location of standard library header files?

1. Update locate database (It may take some time)

sudo updatedb

2. Then paste the output of:

locate unordered_map

here 👍

And please also include whether clang++ can compile simple cpp files like "hello world". Looks like your C++ toolchain is broken and libstdc++ is not found.