Missing includes - normally just report that there are missing includes. The --check-includes can then be used to check what missing includes there are. Ticket: #2719

cli/cmdlineparser.cpp

@@ -573,6 +573,12 @@ bool CmdLineParser::ParseFromArgs(int argc, const char* const argv[])
         }
 #endif
 
+        // Check configuration
+        else if (strcmp(argv[i], "--check-includes") == 0)
+        {
+            _settings->checkIncludes = true;
+        }
+
         // Print help
         else if (strcmp(argv[i], "-h") == 0 || strcmp(argv[i], "--help") == 0)
         {

cli/cppcheckexecutor.cpp

@@ -19,6 +19,8 @@
 #include "cppcheckexecutor.h"
 #include "cppcheck.h"
 #include "threadexecutor.h"
+#include "preprocessor.h"
+#include "errorlogger.h"
 #include <fstream>
 #include <iostream>
 #include <cstdlib> // EXIT_SUCCESS and EXIT_FAILURE
@@ -131,6 +133,8 @@ bool CppCheckExecutor::parseFromArgs(CppCheck *cppcheck, int argc, const char* c
 
 int CppCheckExecutor::check(int argc, const char* const argv[])
 {
+    Preprocessor::missingIncludeFlag = false;
+
     CppCheck cppCheck(*this, true);
     if (!parseFromArgs(&cppCheck, argc, argv))
     {
@@ -181,7 +185,26 @@ int CppCheckExecutor::check(int argc, const char* const argv[])
         returnValue = executor.check();
     }
 
-    reportUnmatchedSuppressions(cppCheck.settings().nomsg.getUnmatchedGlobalSuppressions());
+    if (!cppCheck.settings().checkConfiguration())
+    {
+        reportUnmatchedSuppressions(cppCheck.settings().nomsg.getUnmatchedGlobalSuppressions());
+
+        if (Preprocessor::missingIncludeFlag)
+        {
+            const std::list<ErrorLogger::ErrorMessage::FileLocation> callStack;
+            ErrorLogger::ErrorMessage msg(callStack,
+                                          Severity::information,
+                                          "Cppcheck cannot find all the include files (--check-includes)\n"
+                                          "Cppcheck cannot find all the include files. Cpppcheck can check the code without the "
+                                          "include files found. But the results will probably be more accurate if all the include "
+                                          "files are found. Please check your project's include directories and add all of them "
+                                          "as include directories for Cppcheck. To see what files Cppcheck cannot find use "
+                                          "--check-includes.",
+                                          "missingInclude",
+                                          false);
+            reportErr(msg);
+        }
+    }
 
     if (_settings._xml)
     {

lib/cppcheck.cpp

@@ -122,6 +122,11 @@ unsigned int CppCheck::processFile()
             preprocessor.preprocess(fin, filedata, configurations, _filename, _settings._includePaths);
         }
 
+        if (_settings.checkConfiguration())
+        {
+            return 0;
+        }
+
         _settings.ifcfg = bool(configurations.size() > 1);
 
         if (!_settings.userDefines.empty())
@@ -212,6 +217,11 @@ void CppCheck::analyseFile(std::istream &fin, const std::string &filename)
     preprocessor.preprocess(fin, filedata, configurations, filename, _settings._includePaths);
     const std::string code = Preprocessor::getcode(filedata, "", filename, &_settings, &_errorLogger);
 
+    if (_settings.checkConfiguration())
+    {
+        return;
+    }
+
     // Tokenize..
     Tokenizer tokenizer(&_settings, this);
     std::istringstream istr(code);
@@ -240,7 +250,7 @@ void CppCheck::analyseFile(std::istream &fin, const std::string &filename)
 
 void CppCheck::checkFile(const std::string &code, const char FileName[])
 {
-    if (_settings.terminated())
+    if (_settings.terminated() || _settings.checkConfiguration())
         return;
 
     Tokenizer _tokenizer(&_settings, this);

lib/preprocessor.cpp

@@ -35,6 +35,8 @@
 #include <set>
 #include <stack>
 
+bool Preprocessor::missingIncludeFlag;
+
 Preprocessor::Preprocessor(Settings *settings, ErrorLogger *errorLogger) : _settings(settings), _errorLogger(errorLogger)
 {
 
@@ -1930,7 +1932,12 @@ void Preprocessor::handleIncludes(std::string &code, const std::string &filePath
         }
         else if (!fileOpened)
         {
-            if (_errorLogger && _settings && ((headerType == UserHeader && _settings->isEnabled("missingInclude")) || _settings->debugwarnings))
+            missingIncludeFlag = true;
+
+            if (_errorLogger &&
+                _settings &&
+                _settings->checkIncludes &&
+                (headerType == UserHeader || _settings->debugwarnings))
             {
                 std::string f = filePath;
 

lib/preprocessor.h

@@ -53,6 +53,8 @@ public:
 
     Preprocessor(Settings *settings = 0, ErrorLogger *errorLogger = 0);
 
+    static bool missingIncludeFlag;
+
     /**
      * Extract the code for each configuration
      * @param istr The (file/string) stream to read from.

lib/settings.cpp

@@ -47,6 +47,7 @@ Settings::Settings()
     test_2_pass = false;
     reportProgress = false;
     ifcfg = false;
+    checkIncludes = false;
 }
 
 std::string Settings::Suppressions::parseFile(std::istream &istr)

lib/settings.h

@@ -300,6 +300,15 @@ public:
      * @brief Extra rules
      */
     std::list<Rule> rules;
+
+    /** Is the 'configuration checking' wanted? */
+    bool checkConfiguration() const
+    {
+        return checkIncludes;
+    }
+
+    /** Check configuration: includes */
+    bool checkIncludes;
 };
 
 /// @}