Add --query-driver=/**/* to recommended settings. Also recommend workspace settings for teams.

Fixes #33
Fixes #32

See also:
clangd/clangd#1079
#15 (comment)

Author: cpsauer

README.md

@@ -127,15 +127,16 @@ code --install-extension llvm-vs-code-extensions.vscode-clangd
 code --uninstall-extension ms-vscode.cpptools
 ```
 
-Then, open VSCode user settings.
+Then, open VSCode *user* settings, so things will be automatically set up for all projects you open.
 
-Add the following two, separate entries to `"clangd.arguments"`:
+Add the following three separate entries to `"clangd.arguments"`:
 ```
 --header-insertion=never
 --compile-commands-dir=${workspaceFolder}/
+--query-driver=/**/*
 ```
 (Just copy each as written; VSCode will correctly expand ${workspaceFolder} for each workspace.)
-  -  They get rid of (overzealous) header insertion and are needed to  help it find the compile commands, even when browsing system headers outside the source tree.
+  -  They get rid of (overzealous) header insertion; locate the compile commands correctly, even when browsing system headers outside the source tree; and cause clangd to interrogate Bazel's compiler wrappers to figure out which system headers they include by default.
   -  If your Bazel WORKSPACE is a subdirectory of your project, change --compile-commands-dir to point into that subdirectory by overriding *both* flags in your *workspace* settings
 
 
@@ -146,6 +147,10 @@ If afterwards clangd doesn't prompt you to download the actual clangd server bin
 
 You may need to subsequently reload VSCode [(CMD/CTRL+SHIFT+P)->reload] for the plugin to load. The clangd download should prompt you to do so when it completes.
 
+#### If you work on your repository with others...
+
+... and would like these settings to be automatically applied for your teammates, also add the settings to the VSCode *workspace* settings and then check `.vscode/settings.json` into source control.
+
 ### Other Editors
 
 If you're using another editor, you'll need to follow the same rough steps as above: [get clangd set up to extend the editor](https://clangd.llvm.org/installation.html#editor-plugins) and then supply the flags.