Finding system includes - extraction not allowed driver.

[TBPLtd]

Outline: Windows using mingw C++ toolchain. Neovim lsp. Debugging using gdb.
For simple programs this works OK including debugging. Adding '<vector>' to the cpp file causes the gdb to hang - local code lookup remains absolutely ok.
I believe this is due to the (much discussed) issue about identifying the correct system headers - of course I could be trying to fix the wrong problem maybe.
I believe I can show the issue and I'd appreciate some help in where I can go next.

To do this I've shown the following below:
Neovom lsp lua configuration - I think this is working as I can see log=verbose in the lsp.log file.
Clangd config in '.clang. - I think this is working as I can see a line in lsp.log saying the compilation database is loaded.
compile_commands.json
finally the lsp.log.

From the lsp.log
line 2 I can see the --query-driver with a ',' list.
line 6 (looks like several lines are appended), nevertheless shows success loading the compilation database
lines 9/10 This looks to be the issue - 'System include extraction: not allowed driver' -- yet the value it complains about matches the --query-driver ??

From the compile_commands.json
The command is 'C:\PROGRA~1\MINGW-~1\mingw64\bin\C__~1.EXE - this is also matched by one of the --query-driver entries in lsp.log

Any help very much appreciated.

Neovim clangd config snippet (including some commented out tests)

		clangd = {
				cmd = {
					"clangd",
					--'--query-driver="C:\\\\Program Files\\\\mingw-w64\\\\mingw64\\\\bin\\\\x86_64-w64-mingw32-g++.exe"',
					-- "--query-driver='C:\\Program Files\\mingw-w64\\mingw64\\bin\\x86_64-w64-mingw32-g++.exe'",
					"--query-driver='C:\\PROGRA~1\\MINGW-~1\\mingw64\\bin\\C__~1.EXE','C:\\Program Files\\mingw-w64\\mingw64\\bin\\clang.exe','C:\\Program Files\\mingw-w64\\mingw64\\bin\\x86_64-w64-mingw32-g++.exe'",
					-- "--query-driver='C:\\PROGRA~1\\MINGW-~1\\mingw64\\bin\\X86_64~2.EXE'",
					"--log=verbose",
				},
			},

compile_commands.json

[
{
  "directory": "D:/Users/Graham/Projects/C++/HellowWorld/build/debug",
  "command": "C:\\PROGRA~1\\MINGW-~1\\mingw64\\bin\\C__~1.EXE   -g -std=gnu++14 -o CMakeFiles\\HelloWorld.dir\\HelloWorld.cpp.obj -c D:\\Users\\Graham\\Projects\\C++\\HellowWorld\\src\\HelloWorld.cpp",
  "file": "D:/Users/Graham/Projects/C++/HellowWorld/src/HelloWorld.cpp",
  "output": "CMakeFiles/HelloWorld.dir/HelloWorld.cpp.obj"
},
{
  "directory": "D:/Users/Graham/Projects/C++/HellowWorld/build/debug",
  "command": "C:\\PROGRA~1\\MINGW-~1\\mingw64\\bin\\C__~1.EXE   -g -std=gnu++14 -o CMakeFiles\\HelloWorld.dir\\Stuff.cpp.obj -c D:\\Users\\Graham\\Projects\\C++\\HellowWorld\\src\\Stuff.cpp",
  "file": "D:/Users/Graham/Projects/C++/HellowWorld/src/Stuff.cpp",
  "output": "CMakeFiles/HelloWorld.dir/Stuff.cpp.obj"
}
]

.clangd

CompileFlags:
  CompilationDatabase: ../build/debug
  Compiler: x86_64-w64-mingw32-g++
  Add: [
    --target=x86_64-w64-windows-gnu
  ]

Finally the lsp.log - I've remove the logging stamps for clarity...

[START][2024-07-26 12:42:36] LSP logging initiated
"I[12:42:36.588] clangd version 18.1.3 (https://github.com/llvm/llvm-project c13b7485b87909fcf739f62cfa382b55407433c0)\r\nI[12:42:36.589] Features: windows+grpc\r\nI[12:42:36.589] PID: 2004\r\nI[12:42:36.589] Working directory: D:\\Users\\Graham\\Projects\\C++\\HellowWorld\\src\r\nI[12:42:36.589] argv[0]: C:\\Users\\Graham\\AppData\\Local\\nvim-data\\mason\\packages\\clangd\\clangd_18.1.3\\bin\\clangd.exe\r\nI[12:42:36.589] argv[1]: --query-driver='C:\\PROGRA~1\\MINGW-~1\\mingw64\\bin\\C__~1.EXE','C:\\Program Files\\mingw-w64\\mingw64\\bin\\clang.exe','C:\\Program Files\\mingw-w64\\mingw64\\bin\\x86_64-w64-mingw32-g++.exe'\r\nI[12:42:36.589] argv[2]: --log=verbose\r\n"
'V[12:42:36.595] User config file is C:\\Users\\Graham\\AppData\\Local\\clangd\\config.yaml\r\nI[12:42:36.595] Starting LSP over stdin/stdout\r\nV[12:42:36.596] <<< {"id":1,"jsonrpc":"2.0","method":"initialize","params":{"capabilities":{"offsetEncoding":["utf-8","utf-16"],"textDocument":{"callHierarchy":{"dynamicRegistration":false},"codeAction":{"codeActionLiteralSupport":{"codeActionKind":{"valueSet":["","quickfix","refactor","refactor.extract","refactor.inline","refactor.rewrite","source","source.organizeImports"]}},"dataSupport":true,"dynamicRegistration":false,"isPreferredSupport":true,"resolveSupport":{"properties":["edit"]}},"completion":{"completionItem":{"commitCharactersSupport":true,"deprecatedSupport":true,"documentationFormat":["markdown","plaintext"],"insertReplaceSupport":true,"insertTextModeSupport":{"valueSet":[1,2]},"labelDetailsSupport":true,"preselectSupport":true,"resolveSupport":{"properties":["documentation","detail","additionalTextEdits","sortText","filterText","insertText","textEdit","insertTextFormat","insertTextMode"]},"snippetSupport":true,"tagSupport":{"valueSet":[1]}},"completionItemKind":{"valueSet":[1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25]},"completionList":{"itemDefaults":["commitCharacters","editRange","insertTextFormat","insertTextMode","data"]},"contextSupport":true,"dynamicRegistration":false,"editsNearCursor":true,"insertTextMode":1},"declaration":{"linkSupport":true},"definition":{"linkSupport":true},"documentHighlight":{"dynamicRegistration":false},"documentSymbol":{"dynamicRegistration":false,"hierarchicalDocumentSymbolSupport":true,"symbolKind":{"valueSet":[1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26]}},"hover":{"contentFormat":["markdown","plaintext"],"dynamicRegistration":false},"implementation":{"linkSupport":true},"publishDiagnostics":{"relatedInformation":true,"tagSupport":{"valueSet":[1,2]}},"references":{"dynamicRegistration":false},"rename":{"dynamicRegistration":false,"prepareSupport":true},"semanticTokens":{"augmentsSyntaxTokens":true,"dynamicRegistration":false,"formats":["relative"],"multilineTokenSupport":false,"overlappingTokenSupport":true,"requests":{"full":{"delta":true},"range":false},"serverCancelSupport":false,"tokenModifiers":["declaration","definition","readonly","static","deprecated","abstract","async","modification","documentation","defaultLibrary"],"tokenTypes":["namespace","type","class","enum","interface","struct","typeParameter","parameter","variable","property","enumMember","event","function","method","macro","keyword","modifier","comment","string","number","regexp","operator","decorator"]},"signatureHelp":{"dynamicRegistration":false,"signatureInformation":{"activeParameterSupport":true,"documentationFormat":["markdown","plaintext"],"parameterInformation":{"labelOffsetSupport":true}}},"synchronization":{"didSave":true,"dynamicRegistration":false,"willSave":true,"willSaveWaitUntil":true},"typeDefinition":{"linkSupport":true}},"window":{"showDocument":{"support":true},"showMessage":{"messageActionItem":{"additionalPropertiesSupport":false}},"workDoneProgress":true},"workspace":{"applyEdit":true,"configuration":true,"didChangeWatchedFiles":{"dynamicRegistration":false,"relativePatternSupport":true},"semanticTokens":{"refreshSupport":true},"symbol":{"dynamicRegistration":false,"hierarchicalWorkspaceSymbolSupport":true,"symbolKind":{"valueSet":[1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26]}},"workspaceEdit":{"resourceOperations":["rename","create","delete"]},"workspaceFolders":true}},"clientInfo":{"name":"Neovim","version":"0.9.5"},"initializationOptions":{},"processId":7420,"rootPath":"D:\\\\Users\\\\Graham\\\\Projects\\\\C++\\\\HellowWorld\\\\src","rootUri":"file:///D:/Users/Graham/Projects/C++/HellowWorld/src","trace":"off","workspaceFolders":[{"name":"D:/Users/Graham/Projects/C++/HellowWorld/src","uri":"file:///D:/Users/Graham/Projects/C++/HellowWorld/src"}]}}\r\n\r\nI[12:42:36.596] <-- initialize(1)\r\nI[12:42:36.599] --> reply:initialize(1) 3 ms\r\nV[12:42:36.599] >>> {"id":1,"jsonrpc":"2.0","result":{"capabilities":{"astProvider":true,"callHierarchyProvider":true,"clangdInlayHintsProvider":true,"codeActionProvider":{"codeActionKinds":["quickfix","refactor","info"]},"compilationDatabase":{"automaticReload":true},"completionProvider":{"resolveProvider":false,"triggerCharacters":[".","<",">",":","\\"","/","*"]},"declarationProvider":true,"definitionProvider":true,"documentFormattingProvider":true,"documentHighlightProvider":true,"documentLinkProvider":{"resolveProvider":false},"documentOnTypeFormattingProvider":{"firstTriggerCharacter":"\\n","moreTriggerCharacter":[]},"documentRangeFormattingProvider":true,"documentSymbolProvider":true,"executeCommandProvider":{"commands":["clangd.applyFix","clangd.applyTweak"]},"foldingRangeProvider":true,"hoverProvider":true,"implementationProvider":true,"inactiveRegionsProvider":true,"inlayHintProvider":true,"memoryUsageProvider":true,"referencesProvider":true,"renameProvider":{"prepareProvider":true},"selectionRangeProvider":true,"semanticTokensProvider":{"full":{"delta":true},"legend":{"tokenModifiers":["declaration","definition","deprecated","deduced","readonly","static","abstract","virtual","dependentName","defaultLibrary","usedAsMutableReference","usedAsMutablePointer","constructorOrDestructor","userDefined","functionScope","classScope","fileScope","globalScope"],"tokenTypes":["variable","variable","parameter","function","method","function","property","variable","class","interface","enum","enumMember","type","type","unknown","namespace","typeParameter","concept","type","macro","modifier","operator","bracket","label","comment"]},"range":false},"signatureHelpProvider":{"triggerCharacters":["(",")","{","}","<",">",","]},"standardTypeHierarchyProvider":true,"textDocumentSync":{"change":2,"openClose":true,"save":true},"typeDefinitionProvider":true,"typeHierarchyProvider":true,"workspaceSymbolProvider":true},"offsetEncoding":"utf-8","serverInfo":{"name":"clangd","version":"clangd version 18.1.3 (https://github.com/llvm/llvm-project c13b7485b87909fcf739f62cfa382b55407433c0) windows+grpc x86_64-pc-windows-msvc"}}}\r\n\r\n'
'V[12:42:36.766] <<< {"jsonrpc":"2.0","method":"initialized","params":{}}\r\n\r\nI[12:42:36.766] <-- initialized\r\nV[12:42:36.766] <<< {"jsonrpc":"2.0","method":"textDocument/didOpen","params":{"textDocument":{"languageId":"cpp","text":"// Basic Hello World\\r\\n//\\r\\n#include \\"Stuff.h\\"\\r\\n#include <iostream>\\r\\n#include <vector>\\r\\n\\r\\nint main(int argc, char *argv[]) {\\r\\n  std::cout << \\"Hello World!\\" << std::endl;\\r\\n  std::cout << \\"Version: \\" << __cplusplus << std::endl;\\r\\n\\r\\n  for (int i = 0; i < argc; ++i)\\r\\n    std::cout << \\"Arg: \\" << i << \\" :\\" << argv[i] << std::endl;\\r\\n\\r\\n  Stuff stuff(42);\\r\\n\\r\\n  std::vector<int> mint;\\r\\n\\r\\n  std::cout << \\"Stuff: \\" << stuff.Value() << std::endl;\\r\\n\\r\\n  return 0;\\r\\n}\\r\\n","uri":"file:///D:/Users/Graham/Projects/C++/HellowWorld/src/HelloWorld.cpp","version":0}}}\r\n\r\nI[12:42:36.766] <-- textDocument/didOpen\r\n'
"V[12:42:36.768] System include extraction: driver clang expanded to C:\\Program Files\\mingw-w64\\mingw64\\bin\\clang.exe\r\nV[12:42:36.768] System include extraction: not allowed driver C:\\Program Files\\mingw-w64\\mingw64\\bin\\clang.exe\r\n"
'V[12:42:36.771] config note at D:\\Users\\Graham\\Projects\\C++\\HellowWorld\\src\\.clangd:1:0: Parsing config fragment\r\nV[12:42:36.771] config note at D:\\Users\\Graham\\Projects\\C++\\HellowWorld\\src\\.clangd:1:0: Parsed 1 fragments from file\r\nV[12:42:36.771] Config fragment: compiling D:\\Users\\Graham\\Projects\\C++\\HellowWorld\\src\\.clangd:1 -> 0x00000206170FD8E0 (trusted=false)\r\nI[12:42:36.772] --> textDocument/publishDiagnostics\r\nV[12:42:36.772] >>> {"jsonrpc":"2.0","method":"textDocument/publishDiagnostics","params":{"diagnostics":[],"uri":"file:///D:/Users/Graham/Projects/C%2B%2B/HellowWorld/src/.clangd"}}\r\n\r\nI[12:42:36.772] Loaded compilation database from D:\\Users\\Graham\\Projects\\C++\\HellowWorld\\src\\..\\build\\debug\\compile_commands.json\r\nV[12:42:36.772] Broadcasting compilation database from D:\\Users\\Graham\\Projects\\C++\\HellowWorld\\src\\..\\build\\debug\r\nI[12:42:36.772] --> window/workDoneProgress/create(0)\r\nV[12:42:36.772] >>> {"id":0,"jsonrpc":"2.0","method":"window/workDoneProgress/create","params":{"token":"backgroundIndexProgress"}}\r\n\r\nI[12:42:36.772] Enqueueing 2 commands for indexing\r\n'
'V[12:42:36.774] <<< {"id":2,"jsonrpc":"2.0","method":"textDocument/semanticTokens/full","params":{"textDocument":{"uri":"file:///D:/Users/Graham/Projects/C++/HellowWorld/src/HelloWorld.cpp"}}}\r\n\r\nI[12:42:36.774] <-- textDocument/semanticTokens/full(2)\r\n'
'V[12:42:36.774] <<< {"id":0,"jsonrpc":"2.0","result":null}\r\n\r\nI[12:42:36.774] <-- reply(0)\r\nI[12:42:36.774] --> $/progress\r\nV[12:42:36.774] >>> {"jsonrpc":"2.0","method":"$/progress","params":{"token":"backgroundIndexProgress","value":{"kind":"begin","percentage":0,"title":"indexing"}}}\r\n\r\nI[12:42:36.774] --> $/progress\r\nV[12:42:36.774] >>> {"jsonrpc":"2.0","method":"$/progress","params":{"token":"backgroundIndexProgress","value":{"kind":"report","message":"0/1","percentage":0}}}\r\n\r\n'
"V[12:42:36.778] System include extraction: driver x86_64-w64-mingw32-g++ expanded to C:\\Program Files\\mingw-w64\\mingw64\\bin\\x86_64-w64-mingw32-g++.exe\r\n"
"V[12:42:36.778] System include extraction: not allowed driver C:\\Program Files\\mingw-w64\\mingw64\\bin\\x86_64-w64-mingw32-g++.exe\r\n"
'I[12:42:36.781] ASTWorker building file D:\\Users\\Graham\\Projects\\C++\\HellowWorld\\src\\HelloWorld.cpp version 0 with command \r\n[D:/Users/Graham/Projects/C++/HellowWorld/build/debug]\r\n"C:\\\\Program Files\\\\mingw-w64\\\\mingw64\\\\bin\\\\x86_64-w64-mingw32-g++.exe" --driver-mode=g++ -g -std=gnu++14 -o "CMakeFiles\\\\HelloWorld.dir\\\\HelloWorld.cpp.obj" -c --target=x86_64-w64-windows-gnu "-resource-dir=C:\\\\Users\\\\Graham\\\\AppData\\\\Local\\\\nvim-data\\\\mason\\\\packages\\\\clangd\\\\clangd_18.1.3\\\\lib\\\\clang\\\\18" -- "D:\\\\Users\\\\Graham\\\\Projects\\\\C++\\\\HellowWorld\\\\src\\\\HelloWorld.cpp"\r\n'
'V[12:42:36.784] Driver produced command: cc1 -cc1 -triple x86_64-w64-windows-gnu -fsyntax-only -disable-free -clear-ast-before-backend -disable-llvm-verifier -discard-value-names -main-file-name HelloWorld.cpp -mrelocation-model pic -pic-level 2 -mframe-pointer=none -fmath-errno -ffp-contract=on -fno-rounding-math -mconstructor-aliases -mms-bitfields -funwind-tables=2 -fno-use-init-array -target-cpu x86-64 -tune-cpu generic -debug-info-kind=constructor -dwarf-version=4 -debugger-tuning=gdb -fdebug-compilation-dir=D:/Users/Graham/Projects/C++/HellowWorld/build/debug -fcoverage-compilation-dir=D:/Users/Graham/Projects/C++/HellowWorld/build/debug -resource-dir "C:\\\\Users\\\\Graham\\\\AppData\\\\Local\\\\nvim-data\\\\mason\\\\packages\\\\clangd\\\\clangd_18.1.3\\\\lib\\\\clang\\\\18" -internal-isystem "C:\\\\Program Files\\\\mingw-w64\\\\mingw64\\\\x86_64-w64-mingw32\\\\include\\\\c++" -internal-isystem "C:\\\\Program Files\\\\mingw-w64\\\\mingw64\\\\x86_64-w64-mingw32\\\\include\\\\c++\\\\x86_64-w64-mingw32" -internal-isystem "C:\\\\Program Files\\\\mingw-w64\\\\mingw64\\\\x86_64-w64-mingw32\\\\include\\\\c++\\\\backward" -internal-isystem "C:\\\\Program Files\\\\mingw-w64\\\\mingw64\\\\x86_64-w64-mingw32\\\\include\\\\c++\\\\14.1.0" -internal-isystem "C:\\\\Program Files\\\\mingw-w64\\\\mingw64\\\\x86_64-w64-mingw32\\\\include\\\\c++\\\\14.1.0\\\\x86_64-w64-mingw32" -internal-isystem "C:\\\\Program Files\\\\mingw-w64\\\\mingw64\\\\x86_64-w64-mingw32\\\\include\\\\c++\\\\14.1.0\\\\backward" -internal-isystem "C:\\\\Program Files\\\\mingw-w64\\\\mingw64\\\\include\\\\c++\\\\14.1.0" -internal-isystem "C:\\\\Program Files\\\\mingw-w64\\\\mingw64\\\\include\\\\c++\\\\14.1.0\\\\x86_64-w64-mingw32" -internal-isystem "C:\\\\Program Files\\\\mingw-w64\\\\mingw64\\\\include\\\\c++\\\\14.1.0\\\\backward" -internal-isystem "C:\\\\Program Files\\\\mingw-w64\\\\mingw64\\\\lib\\\\gcc\\\\x86_64-w64-mingw32\\\\14.1.0\\\\include\\\\c++" -internal-isystem "C:\\\\Program Files\\\\mingw-w64\\\\mingw64\\\\lib\\\\gcc\\\\x86_64-w64-mingw32\\\\14.1.0\\\\include\\\\c++\\\\x86_64-w64-mingw32" -internal-isystem "C:\\\\Program Files\\\\mingw-w64\\\\mingw64\\\\lib\\\\gcc\\\\x86_64-w64-mingw32\\\\14.1.0\\\\include\\\\c++\\\\backward" -internal-isystem "C:\\\\Program Files\\\\mingw-w64\\\\mingw64\\\\lib\\\\gcc\\\\x86_64-w64-mingw32\\\\14.1.0\\\\include\\\\g++-v14.1.0" -internal-isystem "C:\\\\Program Files\\\\mingw-w64\\\\mingw64\\\\lib\\\\gcc\\\\x86_64-w64-mingw32\\\\14.1.0\\\\include\\\\g++-v14.1.0\\\\x86_64-w64-mingw32" -internal-isystem "C:\\\\Program Files\\\\mingw-w64\\\\mingw64\\\\lib\\\\gcc\\\\x86_64-w64-mingw32\\\\14.1.0\\\\include\\\\g++-v14.1.0\\\\backward" -internal-isystem "C:\\\\Program Files\\\\mingw-w64\\\\mingw64\\\\lib\\\\gcc\\\\x86_64-w64-mingw32\\\\14.1.0\\\\include\\\\g++-v14.1" -internal-isystem "C:\\\\Program Files\\\\mingw-w64\\\\mingw64\\\\lib\\\\gcc\\\\x86_64-w64-mingw32\\\\14.1.0\\\\include\\\\g++-v14.1\\\\x86_64-w64-mingw32" -internal-isystem "C:\\\\Program Files\\\\mingw-w64\\\\mingw64\\\\lib\\\\gcc\\\\x86_64-w64-mingw32\\\\14.1.0\\\\include\\\\g++-v14.1\\\\backward" -internal-isystem "C:\\\\Program Files\\\\mingw-w64\\\\mingw64\\\\lib\\\\gcc\\\\x86_64-w64-mingw32\\\\14.1.0\\\\include\\\\g++-v14" -internal-isystem "C:\\\\Program Files\\\\mingw-w64\\\\mingw64\\\\lib\\\\gcc\\\\x86_64-w64-mingw32\\\\14.1.0\\\\include\\\\g++-v14\\\\x86_64-w64-mingw32" -internal-isystem "C:\\\\Program Files\\\\mingw-w64\\\\mingw64\\\\lib\\\\gcc\\\\x86_64-w64-mingw32\\\\14.1.0\\\\include\\\\g++-v14\\\\backward" -internal-isystem "C:\\\\Users\\\\Graham\\\\AppData\\\\Local\\\\nvim-data\\\\mason\\\\packages\\\\clangd\\\\clangd_18.1.3\\\\lib\\\\clang\\\\18\\\\include" -internal-isystem "C:\\\\Program Files\\\\mingw-w64\\\\mingw64\\\\x86_64-w64-mingw32\\\\include" -internal-isystem "C:\\\\Program Files\\\\mingw-w64\\\\mingw64\\\\x86_64-w64-mingw32\\\\usr/include" -internal-isystem "C:\\\\Program Files\\\\mingw-w64\\\\mingw64\\\\include" -std=gnu++14 -fdeprecated-macro -ferror-limit 19 -fno-use-cxa-atexit -fgnuc-version=4.2.1 -fskip-odr-check-in-gmf -fcxx-exceptions -fexceptions -exception-model=seh -no-round-trip-args -faddrsig -x c++ "D:\\\\Users\\\\Graham\\\\Projects\\\\C++\\\\HellowWorld\\\\src\\\\HelloWorld.cpp"\r\n'
"V[12:42:36.784] Building first preamble for D:\\Users\\Graham\\Projects\\C++\\HellowWorld\\src\\HelloWorld.cpp version 0\r\n"
"V[12:42:36.844] BackgroundIndex: building version 1 after loading index from disk\r\n"
"V[12:42:36.887] BackgroundIndex: serving version 1 (6494218 bytes)\r\n"
"I[12:42:36.914] --> $/progress\r\n"
'V[12:42:36.914] >>> {"jsonrpc":"2.0","method":"$/progress","params":{"token":"backgroundIndexProgress","value":{"kind":"report","message":"0/1","percentage":0}}}\r\n\r\nI[12:42:36.914] --> $/progress\r\nV[12:42:36.914] >>> {"jsonrpc":"2.0","method":"$/progress","params":{"token":"backgroundIndexProgress","value":{"kind":"end"}}}\r\n\r\n'
'V[12:42:37.072] <<< {"id":3,"jsonrpc":"2.0","method":"textDocument/documentHighlight","params":{"position":{"character":0,"line":0},"textDocument":{"uri":"file:///D:/Users/Graham/Projects/C++/HellowWorld/src/HelloWorld.cpp"}}}\r\n\r\nI[12:42:37.072] <-- textDocument/documentHighlight(3)\r\n'
"I[12:42:37.264] Built preamble of size 3023320 for file D:\\Users\\Graham\\Projects\\C++\\HellowWorld\\src\\HelloWorld.cpp version 0 in 0.48 seconds\r\n"
"I[12:42:37.265] --> workspace/semanticTokens/refresh(1)\r\n"
'V[12:42:37.266] <<< {"jsonrpc":"2.0","method":"$/cancelRequest","params":{"id":2}}\r\n\r\nI[12:42:37.266] <-- $/cancelRequest\r\nV[12:42:37.266] <<< {"id":4,"jsonrpc":"2.0","method":"textDocument/semanticTokens/full","params":{"textDocument":{"uri":"file:///D:/Users/Graham/Projects/C++/HellowWorld/src/HelloWorld.cpp"}}}\r\n\r\nI[12:42:37.266] <-- textDocument/semanticTokens/full(4)\r\n'
'V[12:42:37.266] <<< {"id":1,"jsonrpc":"2.0","result":null}\r\n\r\nI[12:42:37.266] <-- reply(1)\r\n'
'V[12:42:37.266] >>> {"id":1,"jsonrpc":"2.0","method":"workspace/semanticTokens/refresh","params":null}\r\n\r\n'
"I[12:42:37.267] Indexing c++14 standard library in the context of D:\\Users\\Graham\\Projects\\C++\\HellowWorld\\src\\HelloWorld.cpp\r\n"
"V[12:42:37.298] indexed file AST for D:\\Users\\Graham\\Projects\\C++\\HellowWorld\\src\\HelloWorld.cpp version 0:\r\n  symbol slab: 1 symbols, 4456 bytes\r\n  ref slab: 13 symbols, 28 refs, 4544 bytes\r\n  relations slab: 0 relations, 24 bytes\r\n"
'V[12:42:37.298] Build dynamic index for main-file symbols with estimated memory usage of 12688 bytes\r\nI[12:42:37.299] --> textDocument/publishDiagnostics\r\nV[12:42:37.299] >>> {"jsonrpc":"2.0","method":"textDocument/publishDiagnostics","params":{"diagnostics":[],"uri":"file:///D:/Users/Graham/Projects/C%2B%2B/HellowWorld/src/HelloWorld.cpp","version":0}}\r\n\r\nI[12:42:37.299] --> reply:textDocument/semanticTokens/full(2) 524 ms, error: Task was cancelled.\r\n'
'V[12:42:37.299] >>> {"error":{"code":-32800,"message":"Request cancelled"},"id":2,"jsonrpc":"2.0"}\r\n\r\nV[12:42:37.299] ASTWorker running Highlights on version 0 of D:\\Users\\Graham\\Projects\\C++\\HellowWorld\\src\\HelloWorld.cpp\r\nI[12:42:37.299] --> reply:textDocument/documentHighlight(3) 226 ms\r\nV[12:42:37.299] >>> {"id":3,"jsonrpc":"2.0","result":[]}\r\n\r\nV[12:42:37.299] ASTWorker running SemanticHighlights on version 0 of D:\\Users\\Graham\\Projects\\C++\\HellowWorld\\src\\HelloWorld.cpp\r\nI[12:42:37.299] --> reply:textDocument/semanticTokens/full(4) 33 ms\r\nV[12:42:37.299] >>> {"id":4,"jsonrpc":"2.0","result":{"data":[6,4,4,3,131075,0,9,4,2,16387,0,12,4,2,16387,1,2,3,15,131584,0,5,4,0,131584,0,5,2,21,8192,0,18,2,21,8192,0,3,3,15,131584,0,5,4,3,131584,1,2,3,15,131584,0,5,4,0,131584,0,5,2,21,8192,0,15,2,21,8192,0,3,11,19,131072,0,12,2,21,8192,0,3,3,15,131584,0,5,4,3,131584,2,11,1,1,16387,0,7,1,1,16384,0,2,1,21,0,0,2,4,2,16384,0,6,2,21,0,0,2,1,1,16384,1,4,3,15,131584,0,5,4,0,131584,0,5,2,21,8192,0,11,2,21,8192,0,3,1,1,16384,0,2,2,21,8192,0,8,2,21,8192,0,3,4,2,16384,0,5,1,1,16384,0,3,2,21,8192,0,3,3,15,131584,0,5,4,3,131584,2,2,5,8,131072,0,6,5,1,16387,2,2,3,15,131584,0,5,6,8,131584,0,6,1,22,0,0,4,1,22,0,0,2,4,1,16387,2,2,3,15,131584,0,5,4,0,131584,0,5,2,21,8192,0,13,2,21,8192,0,3,5,1,16384,0,6,5,4,32784,0,8,2,21,8192,0,3,3,15,131584,0,5,4,3,131584],"resultId":"1"}}\r\n\r\n'
"V[12:42:37.376] indexed preamble AST for D:\\Users\\Graham\\Projects\\C++\\HellowWorld\\src\\HelloWorld.cpp version 0:\r\n  symbol slab: 5122 symbols, 1602128 bytes\r\n  ref slab: 0 symbols, 0 refs, 136 bytes\r\n  relations slab: 244 relations, 5396 bytes\r\n"
"V[12:42:37.401] Build dynamic index for header symbols with estimated memory usage of 3687032 bytes\r\n"
"V[12:42:39.143] Ignored diagnostic. C:\\Program Files\\mingw-w64\\mingw64\\include\\c++\\14.1.0\\bits/shared_ptr_atomic.h:104:49:too many arguments provided to function-like macro invocation\r\nV[12:42:39.143] Ignored diagnostic. C:\\Users\\Graham\\AppData\\Local\\nvim-data\\mason\\packages\\clangd\\clangd_18.1.3\\lib\\clang\\18\\include\\stdatomic.h:87:9:macro 'atomic_is_lock_free' defined here\r\n"
"V[12:42:39.143] Ignored diagnostic. C:\\Program Files\\mingw-w64\\mingw64\\include\\c++\\14.1.0\\bits/shared_ptr_atomic.h:104:5:redefinition of 'atomic_is_lock_free' as different kind of symbol\r\nV[12:42:39.143] Ignored diagnostic. C:\\Program Files\\mingw-w64\\mingw64\\include\\c++\\14.1.0\\atomic:1296:5:previous definition is here\r\nV[12:42:39.144] Ignored diagnostic. C:\\Program Files\\mingw-w64\\mingw64\\include\\c++\\14.1.0\\bits/shared_ptr_atomic.h:107:7:expected expression\r\nV[12:42:39.144] Ignored diagnostic. C:\\Program Files\\mingw-w64\\mingw64\\include\\c++\\14.1.0\\bits/shared_ptr_atomic.h:111:6:expected ';' at end of declaration\r\nV[12:42:39.144] Ignored diagnostic. C:\\Program Files\\mingw-w64\\mingw64\\include\\c++\\14.1.0\\bits/shared_ptr_atomic.h:116:48:expected ')'\r\n"
"V[12:42:39.144] Ignored diagnostic. C:\\Program Files\\mingw-w64\\mingw64\\include\\c++\\14.1.0\\bits/shared_ptr_atomic.h:116:5:to match this '('\r\nV[12:42:39.144] Ignored diagnostic. C:\\Program Files\\mingw-w64\\mingw64\\include\\c++\\14.1.0\\bits/shared_ptr_atomic.h:116:5:expected expression\r\nV[12:42:39.144] Ignored diagnostic. C:\\Program Files\\mingw-w64\\mingw64\\include\\c++\\14.1.0\\bits/shared_ptr_atomic.h:116:52:expected ';' at end of declaration\r\nV[12:42:39.144] Ignored diagnostic. C:\\Program Files\\mingw-w64\\mingw64\\include\\c++\\14.1.0\\bits/shared_ptr_atomic.h:117:5:expected unqualified-id\r\n"
"V[12:42:39.144] Ignored diagnostic. C:\\Program Files\\mingw-w64\\mingw64\\include\\c++\\14.1.0\\bits/shared_ptr_atomic.h:142:5:expected parameter declarator\r\nV[12:42:39.144] Ignored diagnostic. C:\\Program Files\\mingw-w64\\mingw64\\include\\c++\\14.1.0\\bits/shared_ptr_atomic.h:142:5:expected ')'\r\nV[12:42:39.144] Ignored diagnostic. C:\\Program Files\\mingw-w64\\mingw64\\include\\c++\\14.1.0\\bits/shared_ptr_atomic.h:142:5:to match this '('\r\n"
"V[12:42:39.144] Ignored diagnostic. C:\\Program Files\\mingw-w64\\mingw64\\include\\c++\\14.1.0\\bits/shared_ptr_atomic.h:157:41:too many arguments provided to function-like macro invocation\r\nV[12:42:39.144] Ignored diagnostic. C:\\Users\\Graham\\AppData\\Local\\nvim-data\\mason\\packages\\clangd\\clangd_18.1.3\\lib\\clang\\18\\include\\stdatomic.h:138:9:macro 'atomic_load' defined here\r\n"
"V[12:42:39.144] Ignored diagnostic. C:\\Program Files\\mingw-w64\\mingw64\\include\\c++\\14.1.0\\bits/shared_ptr_atomic.h:157:5:redefinition of 'atomic_load' as different kind of symbol\r\nV[12:42:39.144] Ignored diagnostic. C:\\Program Files\\mingw-w64\\mingw64\\include\\c++\\14.1.0\\atomic:1399:5:previous definition is here\r\nV[12:42:39.144] Ignored diagnostic. C:\\Program Files\\mingw-w64\\mingw64\\include\\c++\\14.1.0\\bits/shared_ptr_atomic.h:158:7:expected expression\r\nV[12:42:39.144] Ignored diagnostic. C:\\Program Files\\mingw-w64\\mingw64\\include\\c++\\14.1.0\\bits/shared_ptr_atomic.h:158:69:expected ';' at end of declaration\r\n"
"V[12:42:39.144] Ignored diagnostic. C:\\Program Files\\mingw-w64\\mingw64\\include\\c++\\14.1.0\\bits/shared_ptr_atomic.h:183:5:expected parameter declarator\r\nV[12:42:39.144] Ignored diagnostic. C:\\Program Files\\mingw-w64\\mingw64\\include\\c++\\14.1.0\\bits/shared_ptr_atomic.h:183:5:expected ')'\r\nV[12:42:39.144] Ignored diagnostic. C:\\Program Files\\mingw-w64\\mingw64\\include\\c++\\14.1.0\\bits/shared_ptr_atomic.h:183:5:to match this '('\r\n"
"V[12:42:39.145] Ignored diagnostic. C:\\Program Files\\mingw-w64\\mingw64\\include\\c++\\14.1.0\\bits/shared_ptr_atomic.h:200:47:too many arguments provided to function-like macro invocation\r\nV[12:42:39.145] Ignored diagnostic. C:\\Users\\Graham\\AppData\\Local\\nvim-data\\mason\\packages\\clangd\\clangd_18.1.3\\lib\\clang\\18\\include\\stdatomic.h:135:9:macro 'atomic_store' defined here\r\n"
"V[12:42:39.145] Ignored diagnostic. C:\\Program Files\\mingw-w64\\mingw64\\include\\c++\\14.1.0\\bits/shared_ptr_atomic.h:200:5:variable has incomplete type 'void'\r\n"
"V[12:42:39.155] Ignored diagnostic. C:\\Program Files\\mingw-w64\\mingw64\\include\\c++\\14.1.0\\bits/shared_ptr_atomic.h:201:34:use of undeclared identifier '__p'\r\n"
"V[12:42:39.155] Ignored diagnostic. too many errors emitted, stopping now\r\n"
"I[12:42:39.772] Indexed c++14 standard library (incomplete due to errors): 11784 symbols, 920 filtered\r\n"
"V[12:42:39.833] Build dynamic index for header symbols with estimated memory usage of 7908568 bytes\r\n"

[HighCommander4]

Try without the single quotes:

"--query-driver=C:\\Program Files\\mingw-w64\\mingw64\\bin\\clang.exe"

[TBPLtd]

Thanks for the suggestion. Progress! Removing the single quote has clearly allowed the drivers to be interrogated.
Sadly looks like both clang and g++ are not responding correctly, or being interrogated correctly.
I have tried the following manually...

 "C:\Program Files\mingw-w64\mingw64\bin\x86_64-w64-mingw32-g++.exe" -E -v -x c++ -target x86_64-w64-windows-gnu

the response complaining...

Unexpected token '-E' in expression or statement.

The relevant lines from the lsp.log are

System include extraction: driver clang expanded to C:\\Program Files\\mingw-w64\\mingw64\\bin\\clang.exe\r\n"
System include extraction: driver execution failed with return code: -1073741515 - ''. Args: [\"C:\\\\Program Files\\\\mingw-w64\\\\mingw64\\\\bin\\\\clang.exe\" -E -v -x c++ -]\r\n"

and

System include extraction: driver x86_64-w64-mingw32-g++ expanded to C:\\Program Files\\mingw-w64\\mingw64\\bin\\x86_64-w64-mingw32-g++.exe\r\n"
System include extraction: driver execution failed with return code: 1 - ''. Args: [\"C:\\\\Program Files\\\\mingw-w64\\\\mingw64\\\\bin\\\\x86_64-w64-mingw32-g++.exe\" -E -v -x c++ -target x86_64-w64-windows-gnu -]\r\n"

[TBPLtd]

Just a minute... I think the manual command was an error on my part - sorry.
Actually it looks to produce the desired results as below - it's just that the command enter a wait for user input mode that needs a CTRL-C to exit. This might be the correct behaviour.
Meanwhile the output is...

> g++ -E -v -x c++ -
Using built-in specs.
COLLECT_GCC=C:\Program Files\mingw-w64\mingw64\bin\g++.exe
OFFLOAD_TARGET_NAMES=nvptx-none
Target: x86_64-w64-mingw32
Configured with: ../configure --prefix=/R/winlibs64ucrt_stage/inst_gcc-14.1.0/share/gcc --build=x86_64-w64-mingw32 --host=x86_64-w64-mingw32 --enable-offload-targets=nvptx-none --with-pkgversion='MinGW-W64 x86_64-ucrt-posix-seh, built by Brecht Sanders, r1' --with-tune=generic --enable-checking=release --enable-threads=posix --disable-sjlj-exceptions --disable-libunwind-exceptions --disable-serial-configure --disable-bootstrap --enable-host-shared --enable-plugin --disable-default-ssp --disable-rpath --disable-libstdcxx-debug --disable-version-specific-runtime-libs --with-stabs --disable-symvers --enable-languages=c,c++,fortran,lto,objc,obj-c++ --disable-gold --disable-nls --disable-stage1-checking --disable-win32-registry --disable-multilib --enable-ld --enable-libquadmath --enable-libada --enable-libssp --enable-libstdcxx --enable-lto --enable-fully-dynamic-string --enable-libgomp --enable-graphite --enable-mingw-wildcard --enable-libstdcxx-time --enable-libstdcxx-pch --with-mpc=/d/Prog/winlibs64ucrt_stage/custombuilt --with-mpfr=/d/Prog/winlibs64ucrt_stage/custombuilt --with-gmp=/d/Prog/winlibs64ucrt_stage/custombuilt --with-isl=/d/Prog/winlibs64ucrt_stage/custombuilt --disable-libstdcxx-backtrace --enable-install-libiberty --enable-__cxa_atexit --without-included-gettext --with-diagnostics-color=auto --enable-clocale=generic --with-libiconv --with-system-zlib --with-build-sysroot=/R/winlibs64ucrt_stage/gcc-14.1.0/build_mingw/mingw-w64 CFLAGS='-I/d/Prog/winlibs64ucrt_stage/custombuilt/include/libdl-win32   -march=nocona -msahf -mtune=generic -O2 -Wno-error=format' CXXFLAGS='-Wno-int-conversion  -march=nocona -msahf -mtune=generic -O2' LDFLAGS='-pthread -Wl,--no-insert-timestamp -Wl,--dynamicbase -Wl,--high-entropy-va -Wl,--nxcompat -Wl,--tsaware' LD=/d/Prog/winlibs64ucrt_stage/custombuilt/share/binutils/bin/ld.exe
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 14.1.0 (MinGW-W64 x86_64-ucrt-posix-seh, built by Brecht Sanders, r1)
COLLECT_GCC_OPTIONS='-E' '-v' '-shared-libgcc' '-mtune=generic' '-march=x86-64'
 C:/Program Files/mingw-w64/mingw64/bin/../libexec/gcc/x86_64-w64-mingw32/14.1.0/cc1plus.exe -E -quiet -v -iprefix C:/Program Files/mingw-w64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/14.1.0/ -D_REENTRANT - -mtune=generic -march=x86-64 -dumpbase -
ignoring duplicate directory "C:/Program Files/mingw-w64/mingw64/lib/gcc/../../lib/gcc/x86_64-w64-mingw32/14.1.0/../../../../include/c++/14.1.0"
ignoring duplicate directory "C:/Program Files/mingw-w64/mingw64/lib/gcc/../../lib/gcc/x86_64-w64-mingw32/14.1.0/../../../../include/c++/14.1.0/x86_64-w64-mingw32"
ignoring duplicate directory "C:/Program Files/mingw-w64/mingw64/lib/gcc/../../lib/gcc/x86_64-w64-mingw32/14.1.0/../../../../include/c++/14.1.0/backward"
ignoring duplicate directory "C:/Program Files/mingw-w64/mingw64/lib/gcc/../../lib/gcc/x86_64-w64-mingw32/14.1.0/include"
ignoring nonexistent directory "R:/winlibs64ucrt_stage/inst_gcc-14.1.0/share/gcc/include"
ignoring nonexistent directory "/R/winlibs64ucrt_stage/inst_gcc-14.1.0/share/gcc/include"
ignoring duplicate directory "C:/Program Files/mingw-w64/mingw64/lib/gcc/../../lib/gcc/x86_64-w64-mingw32/14.1.0/include-fixed"
ignoring duplicate directory "C:/Program Files/mingw-w64/mingw64/lib/gcc/../../lib/gcc/x86_64-w64-mingw32/14.1.0/../../../../x86_64-w64-mingw32/include"
ignoring nonexistent directory "/mingw/include"
#include "..." search starts here:
#include <...> search starts here:
 C:/Program Files/mingw-w64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/14.1.0/../../../../include/c++/14.1.0
 C:/Program Files/mingw-w64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/14.1.0/../../../../include/c++/14.1.0/x86_64-w64-mingw32
 C:/Program Files/mingw-w64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/14.1.0/../../../../include/c++/14.1.0/backward
 C:/Program Files/mingw-w64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/14.1.0/include
 C:/Program Files/mingw-w64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/14.1.0/../../../../include
 C:/Program Files/mingw-w64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/14.1.0/include-fixed
 C:/Program Files/mingw-w64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/14.1.0/../../../../x86_64-w64-mingw32/include
End of search list.

[HighCommander4]

Just to clarify -- manual execution of the command works, but the clangd log is showing "driver execution failed with return code: 1"?

[TBPLtd]

Yes - however I figured out it was due to my .clangd config file having --target in the CompileFlags.
I've removed that and I now believe that clangd is (mostly) working - e.g. if I attempt to open <vector> it is does open the correct system header.
The original problem with the debugger remains - at this stage I'm not sure why.
If you think it best I'll mark you original answer regarding the extra quotes in the --query-driver as the answer.
Thanks very much for the support - very much appreciated.

[HighCommander4]

I figured out it was due to my .clangd config file having --target in the CompileFlags. I've removed that and I now believe that clangd is (mostly) working - e.g. if I attempt to open it is does open the correct system header.

Nice find! Though I believe it only explains the x86_64-w64-mingw32-g++.exe case, not the clang.exe. case.

The original problem with the debugger remains - at this stage I'm not sure why.

I don't expect there's any relation between clangd and the debugger.

Thanks very much for the support - very much appreciated.

Happy to help!