Setting up cpptools's intelligence to work with LLVM repository #10622
Replies: 4 comments 20 replies
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We've configured LLVM in the past, but not with CMake presets. This sounds like it might be a CMake Tools configuration provider issue. If you run the C/C++: Log Diagnostics for the file with squiggles, do you see a custom configuration provided for the source file? |
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I changed my
{
"C_Cpp.intelliSenseEngineFallback": "enabled",
"C_Cpp.experimentalFeatures": "enabled",
"C_Cpp.loggingLevel": "Debug",
"cmake.sourceDirectory": "${workspaceFolder}/runtimes",
"editor.fontSize": 15,
"editor.mouseWheelZoom": false,
"editor.rulers": [
// A ruler with the default or editorRuler.foreground color at column 800
80,
{
"column": 100,
"color": "#546266d7"
},
{
"column": 120,
"color": "#ff000033"
},
],
"files.autoSave": "afterDelay",
"files.associations": {
"deque": "cpp",
"filesystem": "cpp",
"__bit_reference": "cpp",
"__bits": "cpp",
"__config": "cpp",
"__debug": "cpp",
"__errc": "cpp",
"__hash_table": "cpp",
"__locale": "cpp",
"__mutex_base": "cpp",
"__node_handle": "cpp",
"__nullptr": "cpp",
"__split_buffer": "cpp",
"__std_stream": "cpp",
"__string": "cpp",
"__threading_support": "cpp",
"__tree": "cpp",
"__tuple": "cpp",
"any": "cpp",
"array": "cpp",
"atomic": "cpp",
"barrier": "cpp",
"bit": "cpp",
"bitset": "cpp",
"cctype": "cpp",
"charconv": "cpp",
"chrono": "cpp",
"clocale": "cpp",
"cmath": "cpp",
"codecvt": "cpp",
"compare": "cpp",
"complex": "cpp",
"concepts": "cpp",
"condition_variable": "cpp",
"cstdarg": "cpp",
"cstddef": "cpp",
"cstdint": "cpp",
"cstdio": "cpp",
"cstdlib": "cpp",
"cstring": "cpp",
"ctime": "cpp",
"cwchar": "cpp",
"cwctype": "cpp",
"exception": "cpp",
"format": "cpp",
"fstream": "cpp",
"future": "cpp",
"initializer_list": "cpp",
"iomanip": "cpp",
"ios": "cpp",
"iosfwd": "cpp",
"istream": "cpp",
"limits": "cpp",
"list": "cpp",
"locale": "cpp",
"map": "cpp",
"memory": "cpp",
"mutex": "cpp",
"new": "cpp",
"numeric": "cpp",
"optional": "cpp",
"ostream": "cpp",
"random": "cpp",
"ranges": "cpp",
"ratio": "cpp",
"regex": "cpp",
"set": "cpp",
"span": "cpp",
"sstream": "cpp",
"stack": "cpp",
"stdexcept": "cpp",
"streambuf": "cpp",
"string": "cpp",
"string_view": "cpp",
"strstream": "cpp",
"system_error": "cpp",
"tuple": "cpp",
"type_traits": "cpp",
"typeinfo": "cpp",
"unordered_map": "cpp",
"unordered_set": "cpp",
"valarray": "cpp",
"variant": "cpp",
"vector": "cpp",
"algorithm": "cpp",
"*.ipp": "cpp"
},
}My original settings are here (below): #10622 (comment) |
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So without
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I removed After I cleared the output and opened a
This is the output when I opened a
And this is the output from when I open a unit test support header:
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CMake output:
Also:
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If I understand the question correctly. I can see in the full log multiple
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To give some more context:
{
"configurations": [
{
"name": "Mac",
"includePath": [
"${workspaceFolder}",
"${workspaceFolder}/**",
"${workspaceFolder}/libcxx/include",
"${workspaceFolder}/libcxx/include/**",
"${workspaceFolder}/libcxx/test/support",
"${workspaceFolder}/libcxx/test/support/**",
"/Users/hristohristov/Projects/LLVM/llvm-project/libcxx/include/**",
"/Users/hristohristov/Projects/LLVM/llvm-project/libcxx/test/**",
"/Users/hristohristov/Projects/LLVM/llvm-project/libcxx/test/support",
"/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/c++/v1",
"${workspaceFolder}/build/default.debug.libcxx/include/c++/v1"
],
"defines": [],
"macFrameworkPath": [
"/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks"
],
"compilerPath": "/usr/bin/clang",
"cStandard": "c17",
"cppStandard": "c++23",
"intelliSenseMode": "macos-clang-arm64",
"compileCommands": "${workspaceFolder}/build/default.debug.libcxx/compile_commands.json",
"configurationProvider": "ms-vscode.cmake-tools"
}
],
"version": 4
}
{
"cmake.sourceDirectory": "${workspaceFolder}/runtimes",
"files.autoSave": "afterDelay",
"files.associations": {
"deque": "cpp",
"filesystem": "cpp",
"__bit_reference": "cpp",
"__bits": "cpp",
"__config": "cpp",
"__debug": "cpp",
"__errc": "cpp",
"__hash_table": "cpp",
"__locale": "cpp",
"__mutex_base": "cpp",
"__node_handle": "cpp",
"__nullptr": "cpp",
"__split_buffer": "cpp",
"__std_stream": "cpp",
"__string": "cpp",
"__threading_support": "cpp",
"__tree": "cpp",
"__tuple": "cpp",
"any": "cpp",
"array": "cpp",
"atomic": "cpp",
"barrier": "cpp",
"bit": "cpp",
"bitset": "cpp",
"cctype": "cpp",
"charconv": "cpp",
"chrono": "cpp",
"clocale": "cpp",
"cmath": "cpp",
"codecvt": "cpp",
"compare": "cpp",
"complex": "cpp",
"concepts": "cpp",
"condition_variable": "cpp",
"cstdarg": "cpp",
"cstddef": "cpp",
"cstdint": "cpp",
"cstdio": "cpp",
"cstdlib": "cpp",
"cstring": "cpp",
"ctime": "cpp",
"cwchar": "cpp",
"cwctype": "cpp",
"exception": "cpp",
"format": "cpp",
"fstream": "cpp",
"future": "cpp",
"initializer_list": "cpp",
"iomanip": "cpp",
"ios": "cpp",
"iosfwd": "cpp",
"istream": "cpp",
"limits": "cpp",
"list": "cpp",
"locale": "cpp",
"map": "cpp",
"memory": "cpp",
"mutex": "cpp",
"new": "cpp",
"numeric": "cpp",
"optional": "cpp",
"ostream": "cpp",
"random": "cpp",
"ranges": "cpp",
"ratio": "cpp",
"regex": "cpp",
"set": "cpp",
"span": "cpp",
"sstream": "cpp",
"stack": "cpp",
"stdexcept": "cpp",
"streambuf": "cpp",
"string": "cpp",
"string_view": "cpp",
"strstream": "cpp",
"system_error": "cpp",
"tuple": "cpp",
"type_traits": "cpp",
"typeinfo": "cpp",
"unordered_map": "cpp",
"unordered_set": "cpp",
"valarray": "cpp",
"variant": "cpp",
"vector": "cpp",
"algorithm": "cpp",
"*.ipp": "cpp"
}
}
{
"version": 6,
"cmakeMinimumRequired": {
"major": 3,
"minor": 25,
"patch": 1
},
"configurePresets": [
{
"name": "default",
"displayName": "Default Config",
"description": "Default build using Ninja generator",
"hidden": true,
"generator": "Ninja",
"binaryDir": "${sourceParentDir}/build/${presetName}"
},
{
"name": "default.debug.libcxx",
"displayName": "Debug libc++ ",
"description": "libc++ debug configuration",
"inherits": [
"default"
],
"cacheVariables": {
"LLVM_ENABLE_RUNTIMES": {
"type": "STRING",
"value": "libcxx;libcxxabi;libunwind"
},
"CMAKE_EXPORT_COMPILE_COMMANDS": {
"type": "BOOL",
"value": "ON"
}
}
}
],
"buildPresets": [
{
"name": "default",
"configurePreset": "default.debug.libcxx"
}
]
}With VSCode I open the project's root folder. |
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The C/C++: Log Diagnostics output might be more useful, but your existing logging indicates that CMake Tools is not sending any configuration info for the source files -- it just sends "Custom browse configuration received" which is for the browse.path and not for IntelliSense configuration, so you're not getting any include paths added. Are you able to run CMake: Configure to configure CMake Tools to send a correct configuration? Otherwise, you could try setting compileCommands, otherwise it should fallback to the includePath in c_cpp_properties.json. We might be able to investigate LLVM configuration next week if we have time. |
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I have been using VSCode for a few weeks now with LLVM and CodeLLDB for debugging libc++. I created myself a workflow. It could be better but it is workable. |
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@sean-mcmanus I'd like to setup VSCode to enable C++23 mode for IntelliSense in the sources. The above settings don't work, specifically: "cppStandard": "c++23",I still see any code surrounded by version guards as greyed out: #if _LIBCPP_STD_VER >= 23
Is there a way to force IntelliSense to define certain macros and values? What would be the recommended approach? It will be very convenient if I can switch between different language versions on the fly to inspect the code or at least to be able to set the latest version for everything to show up and not be greyed out. |
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We expose c++23 in our settings, but the underlying compiler only supports c++2b, so we use c++2b when querying the compiler, but our logging will still show c++23 being used as an argument to the IntelliSense process. The --clang_version being set to 110000 looks like a bug with our code, but it looks like that would only be hit when we fall back to an "empty" compiler. What does _LIBCPP_STD_VER show when hovering over it and do you know who is setting that? |
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I figured it out -- our mapping of apple clang versions stopped with the Apple Clang 12 to LLVM 11 mapping, so we just need to update that. --clang_version 110000 won't have c++23 support. |
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I've filed a bug at #10920 . I think we can get a fix for 1.16.0 (pre-release). |
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As far as I remember everywhere in the code when hovering over
If you are familiar with |
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Thank you! |
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I just want to let you know that I am using the latest preview. The active code is still grayed out and nothing really changed. Also Intellisense seems to pick up all available names and displays them even if the hovered over one is declared in the same file.
The long story short: LLVM setup doesn't quite work for me yet. |
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@H-G-Hristov When you do log diagnostics what does it show for the Standard Version and --clang_version? Previously the clang_version was 110000 so it was not supporting C++23, which is what was fixed. It's possible there could be other stuff going wrong still. |
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I'm trying to setup VSCode to work with the LLVM.
I managed to setup a CMake preset in
<llvm_root>/runtimesand I am able to compilelibcxx. I want to make IntelliSense work at least to get the ability to ctrl+click on includes/headers, etc but all I get is red squiggles on includes.I added "proper" paths, then I started adding paths randomly but I cannot get it to work:
{ "configurations": [ { "name": "Mac", "includePath": [ "${workspaceFolder}", "${workspaceFolder}/**", "${workspaceFolder}/libcxx/include", "${workspaceFolder}/libcxx/include/**", "${workspaceFolder}/libcxx/test/support", "${workspaceFolder}/libcxx/test/support/**", "/Users/hristohristov/Projects/LLVM/llvm-project/libcxx/include/**", "/Users/hristohristov/Projects/LLVM/llvm-project/libcxx/test/**", "/Users/hristohristov/Projects/LLVM/llvm-project/libcxx/test/support", "/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/c++/v1", "${workspaceFolder}/build/default.debug.libcxx/include/c++/v1" ], "defines": [], "macFrameworkPath": [ "/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks" ], "compilerPath": "/usr/bin/clang", "cStandard": "c17", "cppStandard": "c++23", "intelliSenseMode": "macos-clang-arm64", "compileCommands": "${workspaceFolder}/build/default.debug.libcxx/compile_commands.json", "configurationProvider": "ms-vscode.cmake-tools" } ], "version": 4 }Am I doing something wrong? Is it possible to get InteliSense to work in that context? The unit tests *.cpp's are apparently not part of the CMake file and are not compiled by it.
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