microsoft / microsoft/vscode-cpptools

When using `"cStandard": "c17"`, errors for calls to functions with missing prototypes are not reported

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#14,768 1 comentario 0 reacciones 0 asignados Ver en GitHub

Nadie ha tomado este issue todavía.

Lenguaje dominante
TypeScript
Estrellas
6.2k
Forks
1.7k
Merge medio
14 h 46 min
PR fusionados (30 d)
61

Descripción

Edit: formatting, remove stray junk mostly from my copy/pastes from #14769.

Environment
  • OS and Version: Debian 5.15.153.1-microsoft-standard-WSL2, WSL 2.2.4.0, Windows 10.0.19045.7725
  • VS Code Version: 1.116.0
  • C/C++ Extension Version: 1.34.4
  • If using SSH remote, specify OS of remote machine:
Bug Summary and Steps to Reproduce

Bug Summary:
When using Clang to build a freestanding --target=wasm32 library inside WSL, IntelliSense incorrectly infers implicit function declarations, because with "cStandard": "c17", they very, very obviously shouldn't exist. (That was removed starting C99, over 25 years ago.)

Steps to reproduce:

  1. Start WSL and make sure you have Clang 19.1.7 installed. (Later versions of Clang use a different method internally for the shuffle intrinsic.) Also, ensure there are no open VSCode windows and that no VSCode server is running in the background in the WSL VM. (You can check this pretty quickly with top/htop.)

  2. Create a directory with the following file structure:

    • .vscode/c_cpp_properties.json: see below
    • .vscode/settings.json: 
       {
     "C_Cpp.loggingLevel": "Debug"
 }
    • test.c: 
       int main() {
     struct missing foo;
     one();
     return 0;
 }

  3. Compile the executable and observe the following errors:

    clang -std=c17 -o out test.c

    test.c:3:20: error: variable has incomplete type 'struct missing'
    3 |     struct missing foo;
      |                    ^
test.c:3:12: note: forward declaration of 'struct missing'
    3 |     struct missing foo;
      |            ^
test.c:4:5: error: call to undeclared function 'one'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
    4 |     one();
      |     ^
2 errors generated.

  4. Open the folder in VSCode with only ms-vscode.cpptools running:

    code $(code --list-extensions | grep -v ms-vscode.cpptools | xargs -I % echo '--disable-extension %') .

  5. Open test.c.

    You will observe one error squiggle over foo. If you hover over it, you'll see incomplete type "struct missing" is not allowed C/C++(70).

  6. Hover over one. It will show a prototype of int one().

Expected behavior:

An error squiggle to also appear for one.

Configuration and Logs

I've redacted user-related paths, but that's it. $HOME is obvious, and $PROJECT is the project root.

.vscode/c_cpp_properties.json:

{
    "configurations": [
        {
            "name": "Linux",
            "includePath": [
                "${workspaceFolder}/"
            ],
            "defines": [],
            "compilerPath": "/usr/bin/clang",
            "cStandard": "c17",
            "cppStandard": "c++17",
            "intelliSenseMode": "linux-clang-x64"
        }
    ],
    "version": 4
}

Diagnostics logs, grabbed immediately before following the reproduction steps:

Most of this junk is either from extensions that were manually disabled or unrelated customizations I made for JS development.

-------- Diagnostics - 9/13/2026, 9:54:03 AM
Version: 1.34.4
Current Configuration:
{
    "name": "Linux",
    "includePath": [
        "$PROJECT/"
    ],
    "defines": [],
    "compilerPath": "/usr/bin/clang",
    "cStandard": "c17",
    "cppStandard": "c++17",
    "intelliSenseMode": "linux-clang-x64",
    "compilerPathIsExplicit": true,
    "cStandardIsExplicit": true,
    "cppStandardIsExplicit": true,
    "intelliSenseModeIsExplicit": true,
    "recursiveIncludesPriorityIsExplicit": false,
    "recursiveIncludesOrderIsExplicit": false,
    "compilerPathInCppPropertiesJson": "/usr/bin/clang",
    "mergeConfigurations": false,
    "recursiveIncludes": {},
    "browse": {
        "limitSymbolsToIncludedHeaders": true
    }
}
Modified Settings:
{
    "C_Cpp.loggingLevel": "Debug"
}
Additional Tracked Settings:
{
    "editorTabSize": 4,
    "editorInsertSpaces": true,
    "editorAutoClosingBrackets": "languageDefined",
    "filesEncoding": "utf8",
    "filesAssociations": {
        "*.h": "c",
        "*.svg": "svg",
        "*.{asm,inc,s,nasm,yasm,-----------------------------------------}": "asm-x86-nasm"
    },
    "filesExclude": {
        "**/.git": true,
        "**/.svn": true,
        "**/.hg": true,
        "**/.DS_Store": true,
        "**/Thumbs.db": true
    },
    "filesAutoSaveAfterDelay": false,
    "editorInlayHintsEnabled": true,
    "editorParameterHintsEnabled": true,
    "searchExclude": {
        "**/node_modules": true,
        "**/bower_components": true,
        "**/*.code-search": true
    },
    "workbenchSettingsEditor": "ui"
}
cpptools version (native): 1.34.3.0
Current database path: $HOME/.cache/vscode-cpptools/d004e617ed0d21d84b6351fcd0c58a45/.browse.VC.db
No active translation units.

Language server logs, gathered while following the reproduction steps:

loggingLevel: 6
LSP: (received) cpptools/preinitialize (id: 1)
LSP: (invoked) cpptools/preinitialize (id: 1)
LSP: Sending response (id: 1)
LSP: (received) cpptools/initialize (id: 2)
LSP: (invoked) cpptools/initialize (id: 2)
cpptools version (TypeScript): 1.34.4
cpptools version (native): 1.34.3.0
Autocomplete is enabled.
Error squiggles are enabled if all header dependencies are resolved.
Hover is enabled.
IntelliSense Engine = default.
LSP: Sending response (id: 2)
LSP: (received) cpptools/queryCompilerDefaults (id: 3)
LSP: (invoked) cpptools/queryCompilerDefaults (id: 3)
LSP: (received - deferred) cpptools/didChangeVisibleTextEditors
LSP: (received - deferred) cpptools/didChangeVisibleTextEditors
Querying compiler for default C++ language standard using command line: /usr/bin/clang -x c++ -E -dM /dev/null
Detected language standard version: c++17
Querying compiler for default C language standard using command line: /usr/bin/clang -x c -E -dM /dev/null
Detected language standard version: c17
Querying compiler's default target using command line: "/usr/bin/clang" -dumpmachine
Compiler returned default target value: x86_64-pc-linux-gnu
Compiler info database not connected - skipping load.
Compiler query command line: /usr/bin/clang -std=c17 -m64 -Wp,-v -fno-blocks -E -dM -x c /dev/null
Attempting to get defaults from C compiler in "compilerPath" property: '/usr/bin/clang'
Compiler info database not connected - skipping load.
Compiler query command line: /usr/bin/clang -std=c++17 -m64 -Wp,-v -fno-blocks -E -dM -x c++ /dev/null
Attempting to get defaults from C++ compiler in "compilerPath" property: '/usr/bin/clang'
LSP: Sending response (id: 3)
Processed c_cpp_properties.json in 0.003385721s
LSP: (received) cpptools/queryCompilerDefaults (id: 4)
LSP: (invoked) cpptools/queryCompilerDefaults (id: 4)
LSP: (received) cpptools/didChangeCppProperties
LSP: Sending response (id: 4)
LSP: (invoked) cpptools/didChangeCppProperties
  Folder: $PROJECT will be indexed
  Folder: /usr/include will be indexed
  Folder: /usr/lib/llvm-19/lib/clang/19/include will be indexed
  Folder: /usr/local/include will be indexed
Opening code store: $HOME/.cache/vscode-cpptools/d004e617ed0d21d84b6351fcd0c58a45/.browse.VC.db
Code browsing service initialized
LSP: (queued) cpptools/didChangeVisibleTextEditors
LSP: (queued) cpptools/didChangeVisibleTextEditors
LSP: (invoked) cpptools/didChangeVisibleTextEditors
Unified Store: Files Initialized (completed)
Done parsing remaining files.
Unified Store: Configuration Initialized (completed)
Done parsing remaining files.
LSP: (received) cpptools/getDiagnostics (id: 5)
LSP: (invoked) cpptools/getDiagnostics (id: 5)
LSP: Sending response (id: 5)
LSP: (received) cpptools/didChangeVisibleTextEditors
LSP: (invoked) cpptools/didChangeVisibleTextEditors
LSP: (received) cpptools/didChangeVisibleTextEditors
LSP: (invoked) cpptools/didChangeVisibleTextEditors
LSP: (received) cpptools/didChangeVisibleTextEditors
LSP: (invoked) cpptools/didChangeVisibleTextEditors
LSP: (received) cpptools/didChangeVisibleTextEditors
LSP: (invoked) cpptools/didChangeVisibleTextEditors
LSP: (received) textDocument/didOpen: file://$PROJECT/test.c
LSP: (invoked) textDocument/didOpen: file://$PROJECT/test.c
textDocument/didOpen: file://$PROJECT/test.c
LSP: (received) cpptools/didChangeVisibleTextEditors
LSP: (received) cpptools/getCodeActions: file://$PROJECT/test.c (id: 6)
LSP: (received) cpptools/didChangeVisibleTextEditors
LSP: (received) cpptools/didChangeActiveEditor: file://$PROJECT/test.c
LSP: (received) cpptools/getDocumentSymbols: file://$PROJECT/test.c (id: 7)
LSP: (received) cpptools/didChangeTextEditorSelection
LSP: (invoked) cpptools/getCodeActions: file://$PROJECT/test.c (id: 6)
LSP: (invoked) cpptools/didChangeVisibleTextEditors
Intellisense update pending for: file://$PROJECT/test.c
LSP: (invoked) cpptools/didChangeActiveEditor: file://$PROJECT/test.c
LSP: (invoked) cpptools/getDocumentSymbols: file://$PROJECT/test.c (id: 7)
LSP: (invoked) cpptools/didChangeTextEditorSelection
LSP: Sending response (id: 6)
LSP: Sending response (id: 7)
LSP: (received) cpptools/getCodeActions: file://$PROJECT/test.c (id: 8)
LSP: (invoked) cpptools/getCodeActions: file://$PROJECT/test.c (id: 8)
LSP: Sending response (id: 8)
LSP: (received) cpptools/getCodeActions: file://$PROJECT/test.c (id: 9)
LSP: (invoked) cpptools/getCodeActions: file://$PROJECT/test.c (id: 9)
LSP: Sending response (id: 9)
LSP: (received) cpptools/getFoldingRanges: file://$PROJECT/test.c (id: 10)
LSP: (invoked) cpptools/getFoldingRanges: file://$PROJECT/test.c (id: 10)
LSP: Sending response (id: 10)
LSP: (received) cpptools/getFoldingRanges: file://$PROJECT/test.c (id: 11)
LSP: (invoked) cpptools/getFoldingRanges: file://$PROJECT/test.c (id: 11)
LSP: Sending response (id: 11)
IntelliSense update scheduled and TU acquisition started for: file://$PROJECT/test.c
sending compilation args for $PROJECT/test.c
  canonical: /ClangMode /TC /I"$PROJECT" /Clangisystem"/usr/lib/llvm-19/lib/clang/19/include" /Clangisystem"/usr/local/include" /Clangisystem"/usr/include/x86_64-linux-gnu" /Clangisystem"/usr/include" /D_LP64=1 /D__ATOMIC_ACQUIRE=2 /D__ATOMIC_ACQ_REL=4 /D__ATOMIC_CONSUME=1 /D__ATOMIC_RELAXED=0 /D__ATOMIC_RELEASE=3 /D__ATOMIC_SEQ_CST=5 /D__BIGGEST_ALIGNMENT__=16 /D__BITINT_MAXWIDTH__=8388608 /D__BOOL_WIDTH__=8 /D__BYTE_ORDER__=__ORDER_LITTLE_ENDIAN__ /D"__CHAR16_TYPE__=unsigned short" /D"__CHAR32_TYPE__=unsigned int" /D__CHAR_BIT__=8 /D__CLANG_ATOMIC_BOOL_LOCK_FREE=2 /D__CLANG_ATOMIC_CHAR16_T_LOCK_FREE=2 /D__CLANG_ATOMIC_CHAR32_T_LOCK_FREE=2 /D__CLANG_ATOMIC_CHAR_LOCK_FREE=2 /D__CLANG_ATOMIC_INT_LOCK_FREE=2 /D__CLANG_ATOMIC_LLONG_LOCK_FREE=2 /D__CLANG_ATOMIC_LONG_LOCK_FREE=2 /D__CLANG_ATOMIC_POINTER_LOCK_FREE=2 /D__CLANG_ATOMIC_SHORT_LOCK_FREE=2 /D__CLANG_ATOMIC_WCHAR_T_LOCK_FREE=2 /D__CONSTANT_CFSTRINGS__=1 /D__DBL_DECIMAL_DIG__=17 /D__DBL_DENORM_MIN__=4.9406564584124654e-324 /D__DBL_DIG__=15 /D__DBL_EPSILON__=2.2204460492503131e-16 /D__DBL_HAS_DENORM__=1 /D__DBL_HAS_INFINITY__=1 /D__DBL_HAS_QUIET_NAN__=1 /D__DBL_MANT_DIG__=53 /D__DBL_MAX_10_EXP__=308 /D__DBL_MAX_EXP__=1024 /D__DBL_MAX__=1.7976931348623157e+308 /D__DBL_MIN_10_EXP__=(-307) /D__DBL_MIN_EXP__=(-1021) /D__DBL_MIN__=2.2250738585072014e-308 /D__DBL_NORM_MAX__=1.7976931348623157e+308 /D__DECIMAL_DIG__=__LDBL_DECIMAL_DIG__ /D__ELF__=1 /D__FINITE_MATH_ONLY__=0 /D__FLOAT128__=1 /D__FLT16_DECIMAL_DIG__=5 /D__FLT16_DENORM_MIN__=5.9604644775390625e-8F16 /D__FLT16_DIG__=3 /D__FLT16_EPSILON__=9.765625e-4F16 /D__FLT16_HAS_DENORM__=1 /D__FLT16_HAS_INFINITY__=1 /D__FLT16_HAS_QUIET_NAN__=1 /D__FLT16_MANT_DIG__=11 /D__FLT16_MAX_10_EXP__=4 /D__FLT16_MAX_EXP__=16 /D__FLT16_MAX__=6.5504e+4F16 /D__FLT16_MIN_10_EXP__=(-4) /D__FLT16_MIN_EXP__=(-13) /D__FLT16_MIN__=6.103515625e-5F16 /D__FLT16_NORM_MAX__=6.5504e+4F16 /D__FLT_DECIMAL_DIG__=9 /D__FLT_DENORM_MIN__=1.40129846e-45F /D__FLT_DIG__=6 /D__FLT_EPSILON__=1.19209290e-7F /D__FLT_HAS_DENORM__=1 /D__FLT_HAS_INFINITY__=1 /D__FLT_HAS_QUIET_NAN__=1 /D__FLT_MANT_DIG__=24 /D__FLT_MAX_10_EXP__=38 /D__FLT_MAX_EXP__=128 /D__FLT_MAX__=3.40282347e+38F /D__FLT_MIN_10_EXP__=(-37) /D__FLT_MIN_EXP__=(-125) /D__FLT_MIN__=1.17549435e-38F /D__FLT_NORM_MAX__=3.40282347e+38F /D__FLT_RADIX__=2 /D__FPCLASS_NEGINF=0x0004 /D__FPCLASS_NEGNORMAL=0x0008 /D__FPCLASS_NEGSUBNORMAL=0x0010 /D__FPCLASS_NEGZERO=0x0020 /D__FPCLASS_POSINF=0x0200 /D__FPCLASS_POSNORMAL=0x0100 /D__FPCLASS_POSSUBNORMAL=0x0080 /D__FPCLASS_POSZERO=0x0040 /D__FPCLASS_QNAN=0x0002 /D__FPCLASS_SNAN=0x0001 /D__FXSR__=1 /D__GCC_ASM_FLAG_OUTPUTS__=1 /D__GCC_ATOMIC_BOOL_LOCK_FREE=2 /D__GCC_ATOMIC_CHAR16_T_LOCK_FREE=2 /D__GCC_ATOMIC_CHAR32_T_LOCK_FREE=2 /D__GCC_ATOMIC_CHAR_LOCK_FREE=2 /D__GCC_ATOMIC_INT_LOCK_FREE=2 /D__GCC_ATOMIC_LLONG_LOCK_FREE=2 /D__GCC_ATOMIC_LONG_LOCK_FREE=2 /D__GCC_ATOMIC_POINTER_LOCK_FREE=2 /D__GCC_ATOMIC_SHORT_LOCK_FREE=2 /D__GCC_ATOMIC_TEST_AND_SET_TRUEVAL=1 /D__GCC_ATOMIC_WCHAR_T_LOCK_FREE=2 /D__GCC_CONSTRUCTIVE_SIZE=64 /D__GCC_DESTRUCTIVE_SIZE=64 /D__GCC_HAVE_DWARF2_CFI_ASM=1 /D__GCC_HAVE_SYNC_COMPARE_AND_SWAP_1=1 /D__GCC_HAVE_SYNC_COMPARE_AND_SWAP_2=1 /D__GCC_HAVE_SYNC_COMPARE_AND_SWAP_4=1 /D__GCC_HAVE_SYNC_COMPARE_AND_SWAP_8=1 /D__GNUC_MINOR__=2 /D__GNUC_PATCHLEVEL__=1 /D__GNUC_STDC_INLINE__=1 /D__GNUC__=4 /D__GXX_ABI_VERSION=1002 /D__INT16_C_SUFFIX__= /D"__INT16_FMTd__=\"hd\"" /D"__INT16_FMTi__=\"hi\"" /D__INT16_MAX__=32767 /D__INT16_TYPE__=short /D__INT32_C_SUFFIX__= /D"__INT32_FMTd__=\"d\"" /D"__INT32_FMTi__=\"i\"" /D__INT32_MAX__=2147483647 /D__INT32_TYPE__=int /D__INT64_C_SUFFIX__=L /D"__INT64_FMTd__=\"ld\"" /D"__INT64_FMTi__=\"li\"" /D__INT64_MAX__=9223372036854775807L /D"__INT64_TYPE__=long int" /D__INT8_C_SUFFIX__= /D"__INT8_FMTd__=\"hhd\"" /D"__INT8_FMTi__=\"hhi\"" /D__INT8_MAX__=127 /D"__INT8_TYPE__=signed char" /D__INTMAX_C_SUFFIX__=L /D"__INTMAX_FMTd__=\"ld\"" /D"__INTMAX_FMTi__=\"li\"" /D__INTMAX_MAX__=9223372036854775807L /D"__INTMAX_TYPE__=long int" /D__INTMAX_WIDTH__=64 /D"__INTPTR_FMTd__=\"ld\"" /D"__INTPTR_FMTi__=\"li\"" /D__I…
  edge args (406):
    --c
    -I$PROJECT
    --sys_include=/usr/lib/llvm-19/lib/clang/19/include
    --sys_include=/usr/local/include
    --sys_include=/usr/include/x86_64-linux-gnu
    --sys_include=/usr/include
    -D_LP64=1
    -D__ATOMIC_ACQUIRE=2
    -D__ATOMIC_ACQ_REL=4
    -D__ATOMIC_CONSUME=1
    -D__ATOMIC_RELAXED=0
    -D__ATOMIC_RELEASE=3
    -D__ATOMIC_SEQ_CST=5
    -D__BIGGEST_ALIGNMENT__=16
    -D__BITINT_MAXWIDTH__=8388608
    -D__BOOL_WIDTH__=8
    -D__BYTE_ORDER__=__ORDER_LITTLE_ENDIAN__
    -D__CHAR16_TYPE__=unsigned short
    -D__CHAR32_TYPE__=unsigned int
    -D__CHAR_BIT__=8
    -D__CLANG_ATOMIC_BOOL_LOCK_FREE=2
    -D__CLANG_ATOMIC_CHAR16_T_LOCK_FREE=2
    -D__CLANG_ATOMIC_CHAR32_T_LOCK_FREE=2
    -D__CLANG_ATOMIC_CHAR_LOCK_FREE=2
    -D__CLANG_ATOMIC_INT_LOCK_FREE=2
    -D__CLANG_ATOMIC_LLONG_LOCK_FREE=2
    -D__CLANG_ATOMIC_LONG_LOCK_FREE=2
    -D__CLANG_ATOMIC_POINTER_LOCK_FREE=2
    -D__CLANG_ATOMIC_SHORT_LOCK_FREE=2
    -D__CLANG_ATOMIC_WCHAR_T_LOCK_FREE=2
    -D__CONSTANT_CFSTRINGS__=1
    -D__DBL_DECIMAL_DIG__=17
    -D__DBL_DENORM_MIN__=4.9406564584124654e-324
    -D__DBL_DIG__=15
    -D__DBL_EPSILON__=2.2204460492503131e-16
    -D__DBL_HAS_DENORM__=1
    -D__DBL_HAS_INFINITY__=1
    -D__DBL_HAS_QUIET_NAN__=1
    -D__DBL_MANT_DIG__=53
    -D__DBL_MAX_10_EXP__=308
    -D__DBL_MAX_EXP__=1024
    -D__DBL_MAX__=1.7976931348623157e+308
    -D__DBL_MIN_10_EXP__=(-307)
    -D__DBL_MIN_EXP__=(-1021)
    -D__DBL_MIN__=2.2250738585072014e-308
    -D__DBL_NORM_MAX__=1.7976931348623157e+308
    -D__DECIMAL_DIG__=__LDBL_DECIMAL_DIG__
    -D__ELF__=1
    -D__FINITE_MATH_ONLY__=0
    -D__FLOAT128__=1
    -D__FLT16_DECIMAL_DIG__=5
    -D__FLT16_DENORM_MIN__=5.9604644775390625e-8F16
    -D__FLT16_DIG__=3
    -D__FLT16_EPSILON__=9.765625e-4F16
    -D__FLT16_HAS_DENORM__=1
    -D__FLT16_HAS_INFINITY__=1
    -D__FLT16_HAS_QUIET_NAN__=1
    -D__FLT16_MANT_DIG__=11
    -D__FLT16_MAX_10_EXP__=4
    -D__FLT16_MAX_EXP__=16
    -D__FLT16_MAX__=6.5504e+4F16
    -D__FLT16_MIN_10_EXP__=(-4)
    -D__FLT16_MIN_EXP__=(-13)
    -D__FLT16_MIN__=6.103515625e-5F16
    -D__FLT16_NORM_MAX__=6.5504e+4F16
    -D__FLT_DECIMAL_DIG__=9
    -D__FLT_DENORM_MIN__=1.40129846e-45F
    -D__FLT_DIG__=6
    -D__FLT_EPSILON__=1.19209290e-7F
    -D__FLT_HAS_DENORM__=1
    -D__FLT_HAS_INFINITY__=1
    -D__FLT_HAS_QUIET_NAN__=1
    -D__FLT_MANT_DIG__=24
    -D__FLT_MAX_10_EXP__=38
    -D__FLT_MAX_EXP__=128
    -D__FLT_MAX__=3.40282347e+38F
    -D__FLT_MIN_10_EXP__=(-37)
    -D__FLT_MIN_EXP__=(-125)
    -D__FLT_MIN__=1.17549435e-38F
    -D__FLT_NORM_MAX__=3.40282347e+38F
    -D__FLT_RADIX__=2
    -D__FPCLASS_NEGINF=0x0004
    -D__FPCLASS_NEGNORMAL=0x0008
    -D__FPCLASS_NEGSUBNORMAL=0x0010
    -D__FPCLASS_NEGZERO=0x0020
    -D__FPCLASS_POSINF=0x0200
    -D__FPCLASS_POSNORMAL=0x0100
    -D__FPCLASS_POSSUBNORMAL=0x0080
    -D__FPCLASS_POSZERO=0x0040
    -D__FPCLASS_QNAN=0x0002
    -D__FPCLASS_SNAN=0x0001
    -D__FXSR__=1
    -D__GCC_ASM_FLAG_OUTPUTS__=1
    -D__GCC_ATOMIC_BOOL_LOCK_FREE=2
    -D__GCC_ATOMIC_CHAR16_T_LOCK_FREE=2
    -D__GCC_ATOMIC_CHAR32_T_LOCK_FREE=2
    -D__GCC_ATOMIC_CHAR_LOCK_FREE=2
    -D__GCC_ATOMIC_INT_LOCK_FREE=2
    -D__GCC_ATOMIC_LLONG_LOCK_FREE=2
    -D__GCC_ATOMIC_LONG_LOCK_FREE=2
    -D__GCC_ATOMIC_POINTER_LOCK_FREE=2
    -D__GCC_ATOMIC_SHORT_LOCK_FREE=2
    -D__GCC_ATOMIC_TEST_AND_SET_TRUEVAL=1
    -D__GCC_ATOMIC_WCHAR_T_LOCK_FREE=2
    -D__GCC_CONSTRUCTIVE_SIZE=64
    -D__GCC_DESTRUCTIVE_SIZE=64
    -D__GCC_HAVE_DWARF2_CFI_ASM=1
    -D__GCC_HAVE_SYNC_COMPARE_AND_SWAP_1=1
    -D__GCC_HAVE_SYNC_COMPARE_AND_SWAP_2=1
    -D__GCC_HAVE_SYNC_COMPARE_AND_SWAP_4=1
    -D__GCC_HAVE_SYNC_COMPARE_AND_SWAP_8=1
    -D__GNUC_MINOR__=2
    -D__GNUC_PATCHLEVEL__=1
    -D__GNUC_STDC_INLINE__=1
    -D__GNUC__=4
    -D__GXX_ABI_VERSION=1002
    -D__INT16_C_SUFFIX__=
    -D__INT16_FMTd__="hd"
    -D__INT16_FMTi__="hi"
    -D__INT16_MAX__=32767
    -D__INT16_TYPE__=short
    -D__INT32_C_SUFFIX__=
    -D__INT32_FMTd__="d"
    -D__INT32_FMTi__="i"
    -D__INT32_MAX__=2147483647
    -D__INT32_TYPE__=int
    -D__INT64_C_SUFFIX__=L
    -D__INT64_FMTd__="ld"
    -D__INT64_FMTi__="li"
    -D__INT64_MAX__=9223372036854775807L
    -D__INT64_TYPE__=long int
    -D__INT8_C_SUFFIX__=
    -D__INT8_FMTd__="hhd"
    -D__INT8_FMTi__="hhi"
    -D__INT8_MAX__=127
    -D__INT8_TYPE__=signed char
    -D__INTMAX_C_SUFFIX__=L
    -D__INTMAX_FMTd__="ld"
    -D__INTMAX_FMTi__="li"
    -D__INTMAX_MAX__=9223372036854775807L
    -D__INTMAX_TYPE__=long int
    -D__INTMAX_WIDTH__=64
    -D__INTPTR_FMTd__="ld"
    -D__INTPTR_FMTi__="li"
    -D__INTPTR_MAX__=9223372036854775807L
    -D__INTPTR_TYPE__=long int
    -D__INTPTR_WIDTH__=64
    -D__INT_FAST16_FMTd__="hd"
    -D__INT_FAST16_FMTi__="hi"
    -D__INT_FAST16_MAX__=32767
    -D__INT_FAST16_TYPE__=short
    -D__INT_FAST16_WIDTH__=16
    -D__INT_FAST32_FMTd__="d"
    -D__INT_FAST32_FMTi__="i"
    -D__INT_FAST32_MAX__=2147483647
    -D__INT_FAST32_TYPE__=int
    -D__INT_FAST32_WIDTH__=32
    -D__INT_FAST64_FMTd__="ld"
    -D__INT_FAST64_FMTi__="li"
    -D__INT_FAST64_MAX__=9223372036854775807L
    -D__INT_FAST64_TYPE__=long int
    -D__INT_FAST64_WIDTH__=64
    -D__INT_FAST8_FMTd__="hhd"
    -D__INT_FAST8_FMTi__="hhi"
    -D__INT_FAST8_MAX__=127
    -D__INT_FAST8_TYPE__=signed char
    -D__INT_FAST8_WIDTH__=8
    -D__INT_LEAST16_FMTd__="hd"
    -D__INT_LEAST16_FMTi__="hi"
    -D__INT_LEAST16_MAX__=32767
    -D__INT_LEAST16_TYPE__=short
    -D__INT_LEAST16_WIDTH__=16
    -D__INT_LEAST32_FMTd__="d"
    -D__INT_LEAST32_FMTi__="i"
    -D__INT_LEAST32_MAX__=2147483647
    -D__INT_LEAST32_TYPE__=int
    -D__INT_LEAST32_WIDTH__=32
    -D__INT_LEAST64_FMTd__="ld"
    -D__INT_LEAST64_FMTi__="li"
    -D__INT_LEAST64_MAX__=9223372036854775807L
    -D__INT_LEAST64_TYPE__=long int
    -D__INT_LEAST64_WIDTH__=64
    -D__INT_LEAST8_FMTd__="hhd"
    -D__INT_LEAST8_FMTi__="hhi"
    -D__INT_LEAST8_MAX__=127
    -D__INT_LEAST8_TYPE__=signed char
    -D__INT_LEAST8_WIDTH__=8
    -D__INT_MAX__=2147483647
    -D__INT_WIDTH__=32
    -D__LDBL_DECIMAL_DIG__=21
    -D__LDBL_DENORM_MIN__=3.64519953188247460253e-4951L
    -D__LDBL_DIG__=18
    -D__LDBL_EPSILON__=1.08420217248550443401e-19L
    -D__LDBL_HAS_DENORM__=1
    -D__LDBL_HAS_INFINITY__=1
    -D__LDBL_HAS_QUIET_NAN__=1
    -D__LDBL_MANT_DIG__=64
    -D__LDBL_MAX_10_EXP__=4932
    -D__LDBL_MAX_EXP__=16384
    -D__LDBL_MAX__=1.18973149535723176502e+4932L
    -D__LDBL_MIN_10_EXP__=(-4931)
    -D__LDBL_MIN_EXP__=(-16381)
    -D__LDBL_MIN__=3.36210314311209350626e-4932L
    -D__LDBL_NORM_MAX__=1.18973149535723176502e+4932L
    -D__LITTLE_ENDIAN__=1
    -D__LLONG_WIDTH__=64
    -D__LONG_LONG_MAX__=9223372036854775807LL
    -D__LONG_MAX__=9223372036854775807L
    -D__LONG_WIDTH__=64
    -D__LP64__=1
    -D__MEMORY_SCOPE_DEVICE=1
    -D__MEMORY_SCOPE_SINGLE=4
    -D__MEMORY_SCOPE_SYSTEM=0
    -D__MEMORY_SCOPE_WRKGRP=2
    -D__MEMORY_SCOPE_WVFRNT=3
    -D__MMX__=1
    -D__NO_INLINE__=1
    -D__NO_MATH_INLINES=1
    -D__OBJC_BOOL_IS_BOOL=0
    -D__OPENCL_MEMORY_SCOPE_ALL_SVM_DEVICES=3
    -D__OPENCL_MEMORY_SCOPE_DEVICE=2
    -D__OPENCL_MEMORY_SCOPE_SUB_GROUP=4
    -D__OPENCL_MEMORY_SCOPE_WORK_GROUP=1
    -D__OPENCL_MEMORY_SCOPE_WORK_ITEM=0
    -D__ORDER_BIG_ENDIAN__=4321
    -D__ORDER_LITTLE_ENDIAN__=1234
    -D__ORDER_PDP_ENDIAN__=3412
    -D__PIC__=2
    -D__PIE__=2
    -D__POINTER_WIDTH__=64
    -D__PRAGMA_REDEFINE_EXTNAME=1
    -D__PTRDIFF_FMTd__="ld"
    -D__PTRDIFF_FMTi__="li"
    -D__PTRDIFF_MAX__=9223372036854775807L
    -D__PTRDIFF_TYPE__=long int
    -D__PTRDIFF_WIDTH__=64
    -D__REGISTER_PREFIX__=
    -D__SCHAR_MAX__=127
    -D__SEG_FS=1
    -D__SEG_GS=1
    -D__SHRT_MAX__=32767
    -D__SHRT_WIDTH__=16
    -D__SIG_ATOMIC_MAX__=2147483647
    -D__SIG_ATOMIC_WIDTH__=32
    -D__SIZEOF_DOUBLE__=8
    -D__SIZEOF_FLOAT128__=16
    -D__SIZEOF_FLOAT__=4
    -D__SIZEOF_INT128__=16
    -D__SIZEOF_INT__=4
    -D__SIZEOF_LONG_DOUBLE__=16
    -D__SIZEOF_LONG_LONG__=8
    -D__SIZEOF_LONG__=8
    -D__SIZEOF_POINTER__=8
    -D__SIZEOF_PTRDIFF_T__=8
    -D__SIZEOF_SHORT__=2
    -D__SIZEOF_SIZE_T__=8
    -D__SIZEOF_WCHAR_T__=4
    -D__SIZEOF_WINT_T__=4
    -D__SIZE_FMTX__="lX"
    -D__SIZE_FMTo__="lo"
    -D__SIZE_FMTu__="lu"
    -D__SIZE_FMTx__="lx"
    -D__SIZE_MAX__=18446744073709551615UL
    -D__SIZE_TYPE__=long unsigned int
    -D__SIZE_WIDTH__=64
    -D__SSE2_MATH__=1
    -D__SSE2__=1
    -D__SSE_MATH__=1
    -D__SSE__=1
    -D__STDC_EMBED_EMPTY__=2
    -D__STDC_EMBED_FOUND__=1
    -D__STDC_EMBED_NOT_FOUND__=0
    -D__STDC_HOSTED__=1
    -D__STDC_UTF_16__=1
    -D__STDC_UTF_32__=1
    -D__STDC_VERSION__=201710L
    -D__STDC__=1
    -D__STRICT_ANSI__=1
    -D__UINT16_C_SUFFIX__=
    -D__UINT16_FMTX__="hX"
    -D__UINT16_FMTo__="ho"
    -D__UINT16_FMTu__="hu"
    -D__UINT16_FMTx__="hx"
    -D__UINT16_MAX__=65535
    -D__UINT16_TYPE__=unsigned short
    -D__UINT32_C_SUFFIX__=U
    -D__UINT32_FMTX__="X"
    -D__UINT32_FMTo__="o"
    -D__UINT32_FMTu__="u"
    -D__UINT32_FMTx__="x"
    -D__UINT32_MAX__=4294967295U
    -D__UINT32_TYPE__=unsigned int
    -D__UINT64_C_SUFFIX__=UL
    -D__UINT64_FMTX__="lX"
    -D__UINT64_FMTo__="lo"
    -D__UINT64_FMTu__="lu"
    -D__UINT64_FMTx__="lx"
    -D__UINT64_MAX__=18446744073709551615UL
    -D__UINT64_TYPE__=long unsigned int
    -D__UINT8_C_SUFFIX__=
    -D__UINT8_FMTX__="hhX"
    -D__UINT8_FMTo__="hho"
    -D__UINT8_FMTu__="hhu"
    -D__UINT8_FMTx__="hhx"
    -D__UINT8_MAX__=255
    -D__UINT8_TYPE__=unsigned char
    -D__UINTMAX_C_SUFFIX__=UL
    -D__UINTMAX_FMTX__="lX"
    -D__UINTMAX_FMTo__="lo"
    -D__UINTMAX_FMTu__="lu"
    -D__UINTMAX_FMTx__="lx"
    -D__UINTMAX_MAX__=18446744073709551615UL
    -D__UINTMAX_TYPE__=long unsigned int
    -D__UINTMAX_WIDTH__=64
    -D__UINTPTR_FMTX__="lX"
    -D__UINTPTR_FMTo__="lo"
    -D__UINTPTR_FMTu__="lu"
    -D__UINTPTR_FMTx__="lx"
    -D__UINTPTR_MAX__=18446744073709551615UL
    -D__UINTPTR_TYPE__=long unsigned int
    -D__UINTPTR_WIDTH__=64
    -D__UINT_FAST16_FMTX__="hX"
    -D__UINT_FAST16_FMTo__="ho"
    -D__UINT_FAST16_FMTu__="hu"
    -D__UINT_FAST16_FMTx__="hx"
    -D__UINT_FAST16_MAX__=65535
    -D__UINT_FAST16_TYPE__=unsigned short
    -D__UINT_FAST32_FMTX__="X"
    -D__UINT_FAST32_FMTo__="o"
    -D__UINT_FAST32_FMTu__="u"
    -D__UINT_FAST32_FMTx__="x"
    -D__UINT_FAST32_MAX__=4294967295U
    -D__UINT_FAST32_TYPE__=unsigned int
    -D__UINT_FAST64_FMTX__="lX"
    -D__UINT_FAST64_FMTo__="lo"
    -D__UINT_FAST64_FMTu__="lu"
    -D__UINT_FAST64_FMTx__="lx"
    -D__UINT_FAST64_MAX__=18446744073709551615UL
    -D__UINT_FAST64_TYPE__=long unsigned int
    -D__UINT_FAST8_FMTX__="hhX"
    -D__UINT_FAST8_FMTo__="hho"
    -D__UINT_FAST8_FMTu__="hhu"
    -D__UINT_FAST8_FMTx__="hhx"
    -D__UINT_FAST8_MAX__=255
    -D__UINT_FAST8_TYPE__=unsigned char
    -D__UINT_LEAST16_FMTX__="hX"
    -D__UINT_LEAST16_FMTo__="ho"
    -D__UINT_LEAST16_FMTu__="hu"
    -D__UINT_LEAST16_FMTx__="hx"
    -D__UINT_LEAST16_MAX__=65535
    -D__UINT_LEAST16_TYPE__=unsigned short
    -D__UINT_LEAST32_FMTX__="X"
    -D__UINT_LEAST32_FMTo__="o"
    -D__UINT_LEAST32_FMTu__="u"
    -D__UINT_LEAST32_FMTx__="x"
    -D__UINT_LEAST32_MAX__=4294967295U
    -D__UINT_LEAST32_TYPE__=unsigned int
    -D__UINT_LEAST64_FMTX__="lX"
    -D__UINT_LEAST64_FMTo__="lo"
    -D__UINT_LEAST64_FMTu__="lu"
    -D__UINT_LEAST64_FMTx__="lx"
    -D__UINT_LEAST64_MAX__=18446744073709551615UL
    -D__UINT_LEAST64_TYPE__=long unsigned int
    -D__UINT_LEAST8_FMTX__="hhX"
    -D__UINT_LEAST8_FMTo__="hho"
    -D__UINT_LEAST8_FMTu__="hhu"
    -D__UINT_LEAST8_FMTx__="hhx"
    -D__UINT_LEAST8_MAX__=255
    -D__UINT_LEAST8_TYPE__=unsigned char
    -D__USER_LABEL_PREFIX__=
    -D__VERSION__="Debian Clang 19.1.7 (3+b1)"
    -D__WCHAR_MAX__=2147483647
    -D__WCHAR_TYPE__=int
    -D__WCHAR_WIDTH__=32
    -D__WINT_MAX__=4294967295U
    -D__WINT_TYPE__=unsigned int
    -D__WINT_UNSIGNED__=1
    -D__WINT_WIDTH__=32
    -D__amd64=1
    -D__amd64__=1
    -D__clang__=1
    -D__clang_literal_encoding__="UTF-8"
    -D__clang_major__=19
    -D__clang_minor__=1
    -D__clang_patchlevel__=7
    -D__clang_version__="19.1.7 (3+b1)"
    -D__clang_wide_literal_encoding__="UTF-32"
    -D__code_model_small__=1
    -D__gnu_linux__=1
    -D__k8=1
    -D__k8__=1
    -D__linux=1
    -D__linux__=1
    -D__llvm__=1
    -D__pic__=2
    -D__pie__=2
    -D__seg_fs=__attribute__((address_space(257)))
    -D__seg_gs=__attribute__((address_space(256)))
    -D__tune_k8__=1
    -D__unix=1
    -D__unix__=1
    -D__x86_64=1
    -D__x86_64__=1
    --clang
    --clang_version=190107
    --c17
  intelliSenseMode: linux-clang-x64
Update IntelliSense time (sec): 0.118
LSP: (received) cpptools/getFoldingRanges: file://$PROJECT/test.c (id: 12)
LSP: (invoked) cpptools/getFoldingRanges: file://$PROJECT/test.c (id: 12)
LSP: Sending response (id: 12)
LSP: (received) cpptools/getCodeActions: file://$PROJECT/test.c (id: 13)
LSP: (invoked) cpptools/getCodeActions: file://$PROJECT/test.c (id: 13)
LSP: Sending response (id: 13)
LSP: (received) cpptools/getFoldingRanges: file://$PROJECT/test.c (id: 14)
LSP: (invoked) cpptools/getFoldingRanges: file://$PROJECT/test.c (id: 14)
LSP: Sending response (id: 14)
LSP: (received) cpptools/hover: file://$PROJECT/test.c (id: 15)
LSP: (invoked) cpptools/hover: file://$PROJECT/test.c (id: 15)
LSP: Sending response (id: 15)
LSP: (received) cpptools/getCodeActions: file://$PROJECT/test.c (id: 16)
LSP: (invoked) cpptools/getCodeActions: file://$PROJECT/test.c (id: 16)
LSP: Sending response (id: 16)
LSP: (received) cpptools/hover: file://$PROJECT/test.c (id: 17)
LSP: (invoked) cpptools/hover: file://$PROJECT/test.c (id: 17)
LSP: Sending response (id: 17)
LSP: (received) cpptools/hover: file://$PROJECT/test.c (id: 18)
LSP: (invoked) cpptools/hover: file://$PROJECT/test.c (id: 18)
LSP: Sending response (id: 18)
Other Extensions

I've confirmed this to occur with all extensions except ms-vscode.cpptools manually disabled.

code $(code --list-extensions | grep -v ms-vscode.cpptools | xargs -I % echo '--disable-extension %')

This is included in the reproduction steps.

Additional context

No response

Guía de contribución

Abrir la guía de contribución

Primeros pasos

  1. Lee el issue completo y luego la guía de contribución del proyecto.
  2. Comenta en el issue que vas a ocuparte — evita que dos personas hagan lo mismo.
  3. Haz un fork del repositorio y trabaja en una rama.
  4. Abre un pull request que haga referencia al número del issue.

Línea de trabajo

Comienza con la configuración .vscode/c_cpp_properties.json y la reproducción en test.c, luego ejecuta el comando clang -std=c17 mostrado e inspecciona cómo IntelliSense gestiona la llamada no declarada a one(). Compara los diagnósticos del compilador con el único subrayado ondulado informado; estará terminado cuando IntelliSense informe del error de prototipo ausente para one bajo c17, además del error de estructura incompleta.

Escrito por el modelo de indexación a partir del texto del issue.

Evaluación

Stack tecnológico
c, vscode, wasm
Área
compilers, devtools
Tipo de issue
Error
Dificultad
3/5
Tiempo estimado
1-2 días
Estado de actividad
Activo
Claridad
Bien especificado
Aptitud para principiantes
68/100

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