NAME

       clangd - manual page for clangd 14

DESCRIPTION

       OVERVIEW: 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.

       USAGE: clangd [options]

       OPTIONS:

       Generic Options:

       --help                          - Display available options (--help-hidden for more)

       --help-list                     - Display list of available options (--help-list-hidden for more)

       --version                       - Display the version of this program

       clangd compilation flags options:

       --compile-commands-dir=<string>  -  Specify a path to look for compile_commands.json. If path is invalid,
              clangd will look in the current directory and parent paths of each source file

       --query-driver=<string>         - Comma separated list of globs for white-listing gcc-compatible  drivers
              that  are  safe  to  execute.  Drivers  matching any of these globs will be used to extract system
              includes. e.g. /usr/bin/**/clang-*,/path/to/repo/**/g++-*

       clangd feature options:

       --all-scopes-completion         - If set to true, code completion will include index symbols that are not
              defined in the scopes (e.g. namespaces) visible from the code completion point.  Such  completions
              can insert scope qualifiers

       --background-index              - Index project code in the background and persist index on disk.

       --clang-tidy                    - Enable clang-tidy diagnostics

       --completion-style=<value>      - Granularity of code completion suggestions

       =detailed
              -   One completion item for each semantically distinct completion, with full type information

       =bundled
              -    Similar completion items (e.g. function overloads) are combined. Type information shown where
              possible

       --fallback-style=<string>       - clang-format style to apply by default when no  .clang-format  file  is
              found

       --function-arg-placeholders     - When disabled, completions contain only parentheses for function calls.
              When enabled, completions also contain placeholders for method parameters

       --header-insertion=<value>      - Add #include directives when accepting code completions

       =iwyu  -    Include  what  you  use. Insert the owning header for top-level symbols, unless the header is
              already directly included or the symbol is forward-declared

       =never -   Never insert #include directives as part of code completion

       --header-insertion-decorators   - Prepend a circular dot or space before the completion label,  depending
              on whether an include line will be inserted or not

       --limit-references=<int>         -  Limit  the  number of references returned by clangd. 0 means no limit
              (default=1000)

       --limit-results=<int>           - Limit the number of results  returned  by  clangd.  0  means  no  limit
              (default=100)

       --project-root=<string>         - Path to the project root. Requires remote-index-address to be set.

       --remote-index-address=<string> - Address of the remote index server

       clangd miscellaneous options:

       --check[=<string>]                 -  Parse one file in isolation instead of acting as a language server.
              Useful to  investigate/reproduce  crashes  or  configuration  problems.  With  --check=<filename>,
              attempts to parse a particular file.

       --check-lines[=<string>]           -  If  specified,  limits  the range of tokens in -check file on which
              various features are  tested.  Example  --check-lines=3-7  restricts  testing  to  lines  3  to  7
              (inclusive) or --check-lines=5 to restrict to one line. Default is testing entire file.

       --enable-config                 - Read user and project configuration from YAML files.
              Project  config  is  from  a  .clangd  file  in  the  project  directory.   User  config  is  from
              clangd/config.yaml in the following directories:

       Windows: %USERPROFILE%\AppData\Local
              Mac OS: ~/Library/Preferences/ Others: $XDG_CONFIG_HOME, usually ~/.config

              Configuration is documented at https://clangd.llvm.org/config.html

       -j=<uint>                       - Number of async workers used by clangd. Background index also uses this
              many workers.

       --malloc-trim                   - Release memory periodically via malloc_trim(3).

       --pch-storage=<value>           - Storing PCHs  in  memory  increases  memory  usages,  but  may  improve
              performance

       =disk  -   store PCHs on disk

       =memory
              -   store PCHs in memory

       clangd protocol and logging options:

       --log=<value>                   - Verbosity of log messages written to stderr

       =error
              -   Error messages only

       =info  -   High level execution tracing

       =verbose
              -   Low level details

       --offset-encoding=<value>        -  Force  the offsetEncoding used for character positions. This bypasses
              negotiation via client capabilities

       =utf-8
              -   Offsets are in UTF-8 bytes

       =utf-16
              -   Offsets are in UTF-16 code units

       =utf-32
              -   Offsets are in unicode codepoints

       --path-mappings=<string>        - Translates between client paths (as seen by a remote editor) and server
              paths (where clangd sees files on disk). Comma  separated  list  of  '<client_path>=<server_path>'
              pairs,     the     first     entry     matching     a     given     path     is     used.     e.g.
              /home/project/incl=/opt/include,/home/project=/workarea/project

       --pretty                        - Pretty-print JSON output

clangd 14                                           May 2025                                           CLANGD(1)