danmar · IOBYTE · Jan 10, 2026 · Jan 10, 2026 · Jan 11, 2026 · Jan 11, 2026
diff --git a/cli/cmdlineparser.cpp b/cli/cmdlineparser.cpp
@@ -1184,7 +1184,7 @@ CmdLineParser::Result CmdLineParser::parseFromArgs(int argc, const char* const a
             }
             if (projectType == ImportProject::Type::COMPILE_DB)
                 mSettings.maxConfigsProject = 1;
-            if (projectType == ImportProject::Type::VS_SLN || projectType == ImportProject::Type::VS_VCXPROJ) {
+            if (projectType == ImportProject::Type::VS_SLN || projectType == ImportProject::Type::VS_SLNX || projectType == ImportProject::Type::VS_VCXPROJ) {
                 mSettings.libraries.emplace_back("windows");
             }
             for (const auto &error : project.errors)
@@ -1210,7 +1210,7 @@ CmdLineParser::Result CmdLineParser::parseFromArgs(int argc, const char* const a
                 mLogger.printError("--project-configuration parameter is empty.");
                 return Result::Fail;
             }
-            if (projectType != ImportProject::Type::VS_SLN && projectType != ImportProject::Type::VS_VCXPROJ) {
+            if (projectType != ImportProject::Type::VS_SLN && projectType != ImportProject::Type::VS_SLNX && projectType != ImportProject::Type::VS_VCXPROJ) {
                 mLogger.printError("--project-configuration has no effect - no Visual Studio project provided.");
                 return Result::Fail;
             }
@@ -1645,7 +1645,7 @@ CmdLineParser::Result CmdLineParser::parseFromArgs(int argc, const char* const a
         mSettings.platform.defaultSign = defaultSign;
 
     if (!mSettings.analyzeAllVsConfigs) {
-        if (projectType != ImportProject::Type::VS_SLN && projectType != ImportProject::Type::VS_VCXPROJ) {
+        if (projectType != ImportProject::Type::VS_SLN && projectType != ImportProject::Type::VS_SLNX && projectType != ImportProject::Type::VS_VCXPROJ) {
             if (mAnalyzeAllVsConfigsSetOnCmdLine) {
                 mLogger.printError("--no-analyze-all-vs-configs has no effect - no Visual Studio project provided.");
                 return Result::Fail;
@@ -1931,13 +1931,13 @@ void CmdLineParser::printHelp(bool premium) const
 
     oss <<
         "    --project=<file>     Run Cppcheck on project. The <file> can be a Visual\n"
-        "                         Studio Solution (*.sln), Visual Studio Project\n"
+        "                         Studio Solution (*.sln) or (*.slnx), Visual Studio Project\n"
         "                         (*.vcxproj), compile database (compile_commands.json),\n"
         "                         or Borland C++ Builder 6 (*.bpr). The files to analyse,\n"
         "                         include paths, defines, platform and undefines in\n"
         "                         the specified file will be used.\n"
         "    --project-configuration=<config>\n"
-        "                         If used together with a Visual Studio Solution (*.sln)\n"
+        "                         If used together with a Visual Studio Solution (*.sln) or (*.slnx)\n"
         "                         or Visual Studio Project (*.vcxproj) you can limit\n"
         "                         the configuration cppcheck should check.\n"
         "                         For example: '--project-configuration=Release|Win32'\n"

diff --git a/gui/mainwindow.cpp b/gui/mainwindow.cpp
@@ -767,7 +767,7 @@ QStringList MainWindow::selectFilesToAnalyze(QFileDialog::FileMode mode)
         QMap<QString,QString> filters;
         filters[tr("C/C++ Source")] = FileList::getDefaultFilters().join(" ");
         filters[tr("Compile database")] = compile_commands_json;
-        filters[tr("Visual Studio")] = "*.sln *.vcxproj";
+        filters[tr("Visual Studio")] = "*.sln *.slnx *.vcxproj";
         filters[tr("Borland C++ Builder 6")] = "*.bpr";
         QString lastFilter = mSettings->value(SETTINGS_LAST_ANALYZE_FILES_FILTER).toString();
         selected = QFileDialog::getOpenFileNames(this,
@@ -810,13 +810,14 @@ void MainWindow::analyzeFiles()
 
     const QString file0 = (!selected.empty() ? selected[0].toLower() : QString());
     if (file0.endsWith(".sln")
+        || file0.endsWith(".slnx")
         || file0.endsWith(".vcxproj")
         || file0.endsWith(compile_commands_json)
         || file0.endsWith(".bpr")) {
         ImportProject p;
         p.import(selected[0].toStdString());
 
-        if (file0.endsWith(".sln")) {
+        if (file0.endsWith(".sln") || file0.endsWith(".slnx")) {
             QStringList configs;
             for (auto it = p.fileSettings.cbegin(); it != p.fileSettings.cend(); ++it) {
                 const QString cfg(QString::fromStdString(it->cfg));
@@ -1969,6 +1970,7 @@ void MainWindow::analyzeProject(const ProjectFile *projectFile, const QStringLis
             switch (result) {
             case ImportProject::Type::COMPILE_DB:
             case ImportProject::Type::VS_SLN:
+            case ImportProject::Type::VS_SLNX:
             case ImportProject::Type::VS_VCXPROJ:
             case ImportProject::Type::BORLAND:
             case ImportProject::Type::CPPCHECK_GUI:

diff --git a/gui/projectfiledialog.cpp b/gui/projectfiledialog.cpp
@@ -112,7 +112,7 @@ static std::string suppressionAsText(const SuppressionList::Suppression& s)
 
 QStringList ProjectFileDialog::getProjectConfigs(const QString &fileName)
 {
-    if (!fileName.endsWith(".sln") && !fileName.endsWith(".vcxproj"))
+    if (!fileName.endsWith(".sln") && !fileName.endsWith(".slnx") && !fileName.endsWith(".vcxproj"))
         return QStringList();
     QStringList ret;
     ImportProject importer;
@@ -612,7 +612,7 @@ void ProjectFileDialog::updatePathsAndDefines()
 {
     const QString &fileName = mUI->mEditImportProject->text();
     const bool importProject = !fileName.isEmpty();
-    const bool hasConfigs = fileName.endsWith(".sln") || fileName.endsWith(".vcxproj");
+    const bool hasConfigs = fileName.endsWith(".sln") || fileName.endsWith(".slnx") || fileName.endsWith(".vcxproj");
     mUI->mBtnClearImportProject->setEnabled(importProject);
     mUI->mListCheckPaths->setEnabled(!importProject);
     mUI->mListIncludeDirs->setEnabled(!importProject);
@@ -642,7 +642,7 @@ void ProjectFileDialog::browseImportProject()
     const QFileInfo inf(mProjectFile->getFilename());
     const QDir &dir = inf.absoluteDir();
     QMap<QString,QString> filters;
-    filters[tr("Visual Studio")] = "*.sln *.vcxproj";
+    filters[tr("Visual Studio")] = "*.sln *.slnx *.vcxproj";
     filters[tr("Compile database")] = "compile_commands.json";
     filters[tr("Borland C++ Builder 6")] = "*.bpr";
     QString fileName = QFileDialog::getOpenFileName(this, tr("Import Project"),

diff --git a/lib/importproject.cpp b/lib/importproject.cpp
@@ -187,6 +187,12 @@ ImportProject::Type ImportProject::import(const std::string &filename, Settings
             setRelativePaths(filename);
             return ImportProject::Type::VS_SLN;
         }
+    }
+    else if (endsWith(filename, ".slnx")) {
+        if (importSlnx(filename, fileFilters)) {
+            setRelativePaths(filename);
+            return ImportProject::Type::VS_SLNX;
+        }
     } else if (endsWith(filename, ".vcxproj")) {
         std::map<std::string, std::string, cppcheck::stricmp> variables;
         std::vector<SharedItemsProject> sharedItemsProjects;
@@ -488,6 +494,54 @@ bool ImportProject::importSln(std::istream &istr, const std::string &path, const
     return true;
 }
 
+bool ImportProject::importSlnx(const std::string& filename, const std::vector<std::string>& fileFilters)
+{
+    tinyxml2::XMLDocument doc;
+    const tinyxml2::XMLError error = doc.LoadFile(filename.c_str());
+    if (error != tinyxml2::XML_SUCCESS) {
+        errors.emplace_back(std::string("Visual Studio project file is not a valid XML - ") + tinyxml2::XMLDocument::ErrorIDToName(error));
+        return false;
+    }
+
+    const tinyxml2::XMLElement* const rootnode = doc.FirstChildElement();
+    if (rootnode == nullptr) {
+        errors.emplace_back("Visual Studio project file has no XML root node");
+        return false;
+    }
+
+    std::map<std::string, std::string, cppcheck::stricmp> variables;
+    variables["SolutionDir"] = Path::simplifyPath(Path::getPathFromFilename(filename));
+
+    bool found = false;
+    std::vector<SharedItemsProject> sharedItemsProjects;
+
+    for (const tinyxml2::XMLElement* node = rootnode->FirstChildElement(); node; node = node->NextSiblingElement()) {
+        const char* name = node->Name();
+        if (std::strcmp(name, "Project") == 0) {
+            const char* labelAttribute = node->Attribute("Path");
+            if (labelAttribute) {
+                std::string vcxproj(labelAttribute);
+                vcxproj = Path::toNativeSeparators(std::move(vcxproj));
+                if (!Path::isAbsolute(vcxproj))
+                    vcxproj = variables["SolutionDir"] + vcxproj;
+                vcxproj = Path::fromNativeSeparators(std::move(vcxproj));
+                if (!importVcxproj(vcxproj, variables, "", fileFilters, sharedItemsProjects)) {
+                    errors.emplace_back("failed to load '" + vcxproj + "' from Visual Studio solution");
+                    return false;
+                }
+                found = true;
+            }
+        }
+    }
+
+    if (!found) {
+        errors.emplace_back("no projects found in Visual Studio solution file");
+        return false;
+    }
+
+    return true;
+}
+
 namespace {
     struct ProjectConfiguration {
         explicit ProjectConfiguration(const tinyxml2::XMLElement *cfg) {

diff --git a/lib/importproject.h b/lib/importproject.h
@@ -64,6 +64,7 @@ class CPPCHECKLIB WARN_UNUSED ImportProject {
         FAILURE,
         COMPILE_DB,
         VS_SLN,
+        VS_SLNX,
         VS_VCXPROJ,
         BORLAND,
         CPPCHECK_GUI
@@ -113,6 +114,7 @@ class CPPCHECKLIB WARN_UNUSED ImportProject {
     };
 
     bool importSln(std::istream &istr, const std::string &path, const std::vector<std::string> &fileFilters);
+    bool importSlnx(const std::string& filename, const std::vector<std::string>& fileFilters);
     SharedItemsProject importVcxitems(const std::string &filename, const std::vector<std::string> &fileFilters, std::vector<SharedItemsProject> &cache);
     bool importVcxproj(const std::string &filename, std::map<std::string, std::string, cppcheck::stricmp> &variables, const std::string &additionalIncludeDirectories, const std::vector<std::string> &fileFilters, std::vector<SharedItemsProject> &cache);
     bool importVcxproj(const std::string &filename, const tinyxml2::XMLDocument &doc, std::map<std::string, std::string, cppcheck::stricmp> &variables, const std::string &additionalIncludeDirectories, const std::vector<std::string> &fileFilters, std::vector<SharedItemsProject> &cache);

diff --git a/man/manual.md b/man/manual.md
@@ -309,12 +309,16 @@ To ignore certain folders you can use `-i`. This will skip analysis of source fi
 
 ## Visual Studio
 
-You can run Cppcheck on individual project files (\*.vcxproj) or on a whole solution (\*.sln)
+You can run Cppcheck on individual project files (\*.vcxproj) or on a whole solution (\*.sln) or (\*.slnx)
 
 Running Cppcheck on an entire Visual Studio solution:
 
     cppcheck --project=foobar.sln
 
+Running Cppcheck on an entire Visual Studio 2026 solution:
+
+    cppcheck --project=foobar.slnx
+
 Running Cppcheck on a Visual Studio project:
 
     cppcheck --project=foobar.vcxproj

diff --git a/test/cli/helloworld2/helloworld2.cppcheck b/test/cli/helloworld2/helloworld2.cppcheck
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="1">
+    <root name="."/>
+    <importproject>helloworld2.slnx</importproject>
+    <analyze-all-vs-configs>false</analyze-all-vs-configs>
+</project>
diff --git a/test/cli/helloworld2/helloworld2.slnx b/test/cli/helloworld2/helloworld2.slnx
@@ -0,0 +1,7 @@
+<Solution>
+  <Configurations>
+    <Platform Name="x64" />
+    <Platform Name="x86" />
+  </Configurations>
+  <Project Path="helloworld2.vcxproj" />
+</Solution>
diff --git a/test/cli/helloworld2/helloworld2.vcxproj b/test/cli/helloworld2/helloworld2.vcxproj
@@ -0,0 +1,123 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project DefaultTargets="Build" ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ItemGroup Label="ProjectConfigurations">
+    <ProjectConfiguration Include="Debug|Win32">
+      <Configuration>Debug</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|Win32">
+      <Configuration>Release</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Debug|x64">
+      <Configuration>Debug</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|x64">
+      <Configuration>Release</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+  </ItemGroup>
+  <PropertyGroup Label="Globals">
+    <VCProjectVersion>15.0</VCProjectVersion>
+    <ProjectGuid>{7319858B-261C-4F0D-B022-92BB896242DD}</ProjectGuid>
+    <RootNamespace>helloworld2</RootNamespace>
+    <WindowsTargetPlatformVersion>10.0.16299.0</WindowsTargetPlatformVersion>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>true</UseDebugLibraries>
+    <PlatformToolset>v141</PlatformToolset>
+    <CharacterSet>MultiByte</CharacterSet>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>false</UseDebugLibraries>
+    <PlatformToolset>v141</PlatformToolset>
+    <WholeProgramOptimization>true</WholeProgramOptimization>
+    <CharacterSet>MultiByte</CharacterSet>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>true</UseDebugLibraries>
+    <PlatformToolset>v141</PlatformToolset>
+    <CharacterSet>MultiByte</CharacterSet>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>false</UseDebugLibraries>
+    <PlatformToolset>v141</PlatformToolset>
+    <WholeProgramOptimization>true</WholeProgramOptimization>
+    <CharacterSet>MultiByte</CharacterSet>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
+  <ImportGroup Label="ExtensionSettings">
+  </ImportGroup>
+  <ImportGroup Label="Shared">
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+  </ImportGroup>
+  <PropertyGroup Label="UserMacros" />
+  <PropertyGroup />
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <ClCompile>
+      <WarningLevel>Level3</WarningLevel>
+      <Optimization>Disabled</Optimization>
+      <SDLCheck>true</SDLCheck>
+      <ConformanceMode>true</ConformanceMode>
+    </ClCompile>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
+    <ClCompile>
+      <WarningLevel>Level3</WarningLevel>
+      <Optimization>Disabled</Optimization>
+      <SDLCheck>true</SDLCheck>
+      <ConformanceMode>true</ConformanceMode>
+    </ClCompile>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <ClCompile>
+      <WarningLevel>Level3</WarningLevel>
+      <Optimization>MaxSpeed</Optimization>
+      <FunctionLevelLinking>true</FunctionLevelLinking>
+      <IntrinsicFunctions>true</IntrinsicFunctions>
+      <SDLCheck>true</SDLCheck>
+      <ConformanceMode>true</ConformanceMode>
+    </ClCompile>
+    <Link>
+      <EnableCOMDATFolding>true</EnableCOMDATFolding>
+      <OptimizeReferences>true</OptimizeReferences>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <ClCompile>
+      <WarningLevel>Level3</WarningLevel>
+      <Optimization>MaxSpeed</Optimization>
+      <FunctionLevelLinking>true</FunctionLevelLinking>
+      <IntrinsicFunctions>true</IntrinsicFunctions>
+      <SDLCheck>true</SDLCheck>
+      <ConformanceMode>true</ConformanceMode>
+    </ClCompile>
+    <Link>
+      <EnableCOMDATFolding>true</EnableCOMDATFolding>
+      <OptimizeReferences>true</OptimizeReferences>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemGroup>
+    <ClCompile Include="main.c" />
+  </ItemGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
+  <ImportGroup Label="ExtensionTargets">
+  </ImportGroup>
+</Project>
diff --git a/test/cli/helloworld2/main.c b/test/cli/helloworld2/main.c
@@ -0,0 +1,11 @@
+#include <stdio.h>
+
+int main(void) {
+    (void)printf("Hello world!\n");
+    int x = 3 / 0; (void)x; // ERROR
+    return 0;
+}
+
+#ifdef SOME_CONFIG
+void foo();
+#endif