iwyu: Fix more findings

28 files changed, 170 insertions, 128 deletions

diff --git a/Source/CPack/IFW/cmCPackIFWInstaller.cxx b/Source/CPack/IFW/cmCPackIFWInstaller.cxx
index 0098a4b..ba3248f 100644
--- a/Source/CPack/IFW/cmCPackIFWInstaller.cxx
+++ b/Source/CPack/IFW/cmCPackIFWInstaller.cxx
@@ -2,6 +2,11 @@
    file Copyright.txt or https://cmake.org/licensing for details.  */
 #include "cmCPackIFWInstaller.h"
 
+#include <cmConfigure.h>
+#include <sstream>
+#include <stddef.h>
+#include <utility>
+
 #include "CPack/cmCPackGenerator.h"
 #include "CPack/cmCPackLog.h"
 #include "cmCPackIFWGenerator.h"
@@ -12,9 +17,6 @@
 #include "cmXMLParser.h"
 #include "cmXMLWriter.h"
 
-#include <cmConfigure.h>
-#include <utility>
-
 #ifdef cmCPackLogger
 #undef cmCPackLogger
 #endif
diff --git a/Source/CPack/cmCPackGenerator.cxx b/Source/CPack/cmCPackGenerator.cxx
index 09b9c0d..3878a32 100644
--- a/Source/CPack/cmCPackGenerator.cxx
+++ b/Source/CPack/cmCPackGenerator.cxx
@@ -2,24 +2,24 @@
    file Copyright.txt or https://cmake.org/licensing for details.  */
 #include "cmCPackGenerator.h"
 
+#include <algorithm>
+#include <cmsys/FStream.hxx>
+#include <cmsys/Glob.hxx>
+#include <cmsys/RegularExpression.hxx>
+#include <list>
+#include <utility>
+
 #include "cmCPackComponentGroup.h"
 #include "cmCPackLog.h"
 #include "cmCryptoHash.h"
 #include "cmGeneratedFileStream.h"
 #include "cmGlobalGenerator.h"
 #include "cmMakefile.h"
-#include "cmStateTypes.h"
+#include "cmStateSnapshot.h"
 #include "cmXMLSafe.h"
 #include "cm_auto_ptr.hxx"
 #include "cmake.h"
 
-#include <algorithm>
-#include <cmsys/FStream.hxx>
-#include <cmsys/Glob.hxx>
-#include <cmsys/RegularExpression.hxx>
-#include <list>
-#include <utility>
-
 #if defined(__HAIKU__)
 #include <FindDirectory.h>
 #include <StorageDefs.h>
diff --git a/Source/CPack/cmCPackGenerator.h b/Source/CPack/cmCPackGenerator.h
index f32dd70..b43bf8a 100644
--- a/Source/CPack/cmCPackGenerator.h
+++ b/Source/CPack/cmCPackGenerator.h
@@ -5,14 +5,15 @@
 
 #include <cmConfigure.h>
 
-#include "cmCPackComponentGroup.h"
-#include "cmSystemTools.h"
-
 #include <map>
 #include <sstream>
 #include <string>
 #include <vector>
 
+#include "cmCPackComponentGroup.h"
+#include "cmSystemTools.h"
+
+class cmCPackGenerator;
 class cmCPackLog;
 class cmInstalledFile;
 class cmMakefile;
diff --git a/Source/CPack/cmCPackGeneratorFactory.cxx b/Source/CPack/cmCPackGeneratorFactory.cxx
index 2a0e65b..b012f01 100644
--- a/Source/CPack/cmCPackGeneratorFactory.cxx
+++ b/Source/CPack/cmCPackGeneratorFactory.cxx
@@ -2,9 +2,15 @@
    file Copyright.txt or https://cmake.org/licensing for details.  */
 #include "cmCPackGeneratorFactory.h"
 
+#include <cmConfigure.h>
+#include <ostream>
+#include <utility>
+
 #include "IFW/cmCPackIFWGenerator.h"
+#include "cmAlgorithms.h"
 #include "cmCPack7zGenerator.h"
 #include "cmCPackGenerator.h"
+#include "cmCPackLog.h"
 #include "cmCPackNSISGenerator.h"
 #include "cmCPackSTGZGenerator.h"
 #include "cmCPackTGZGenerator.h"
@@ -36,12 +42,6 @@
 #include "WiX/cmCPackWIXGenerator.h"
 #endif
 
-#include "cmAlgorithms.h"
-#include "cmCPackLog.h"
-
-#include <ostream>
-#include <utility>
-
 cmCPackGeneratorFactory::cmCPackGeneratorFactory()
 {
   if (cmCPackTGZGenerator::CanGenerate()) {
diff --git a/Source/CPack/cmCPackGeneratorFactory.h b/Source/CPack/cmCPackGeneratorFactory.h
index 0a98f91..4ee0bc1 100644
--- a/Source/CPack/cmCPackGeneratorFactory.h
+++ b/Source/CPack/cmCPackGeneratorFactory.h
@@ -3,7 +3,7 @@
 #ifndef cmCPackGeneratorFactory_h
 #define cmCPackGeneratorFactory_h
 
-#include <cmConfigure.h>
+#include <cmConfigure.h> // IWYU pragma: keep
 
 #include <map>
 #include <string>
diff --git a/Source/CPack/cmCPackLog.cxx b/Source/CPack/cmCPackLog.cxx
index 317f613..7d5c192 100644
--- a/Source/CPack/cmCPackLog.cxx
+++ b/Source/CPack/cmCPackLog.cxx
@@ -2,11 +2,12 @@
    file Copyright.txt or https://cmake.org/licensing for details.  */
 #include "cmCPackLog.h"
 
+#include <cmConfigure.h>
+#include <iostream>
+
 #include "cmGeneratedFileStream.h"
 #include "cmSystemTools.h"
 
-#include <iostream>
-
 cmCPackLog::cmCPackLog()
 {
   this->Verbose = false;
diff --git a/Source/CPack/cmCPackLog.h b/Source/CPack/cmCPackLog.h
index 9ffe5c4..419c932 100644
--- a/Source/CPack/cmCPackLog.h
+++ b/Source/CPack/cmCPackLog.h
@@ -3,7 +3,7 @@
 #ifndef cmCPackLog_h
 #define cmCPackLog_h
 
-#include <cmConfigure.h>
+#include <cmConfigure.h> // IWYU pragma: keep
 
 #include <ostream>
 #include <string.h>
diff --git a/Source/CPack/cmCPackRPMGenerator.cxx b/Source/CPack/cmCPackRPMGenerator.cxx
index 9817327..8ec03c2 100644
--- a/Source/CPack/cmCPackRPMGenerator.cxx
+++ b/Source/CPack/cmCPackRPMGenerator.cxx
@@ -2,17 +2,18 @@
    file Copyright.txt or https://cmake.org/licensing for details.  */
 #include "cmCPackRPMGenerator.h"
 
-#include "cmCPackComponentGroup.h"
-#include "cmCPackGenerator.h"
-#include "cmCPackLog.h"
-#include "cmSystemTools.h"
-
 #include <algorithm>
+#include <ctype.h>
 #include <map>
 #include <ostream>
 #include <utility>
 #include <vector>
 
+#include "cmCPackComponentGroup.h"
+#include "cmCPackGenerator.h"
+#include "cmCPackLog.h"
+#include "cmSystemTools.h"
+
 cmCPackRPMGenerator::cmCPackRPMGenerator()
 {
 }
diff --git a/Source/CPack/cmCPackSTGZGenerator.cxx b/Source/CPack/cmCPackSTGZGenerator.cxx
index 66ba9f6..682394e 100644
--- a/Source/CPack/cmCPackSTGZGenerator.cxx
+++ b/Source/CPack/cmCPackSTGZGenerator.cxx
@@ -2,10 +2,6 @@
    file Copyright.txt or https://cmake.org/licensing for details.  */
 #include "cmCPackSTGZGenerator.h"
 
-#include "cmCPackGenerator.h"
-#include "cmCPackLog.h"
-#include "cmSystemTools.h"
-
 #include <cmsys/FStream.hxx>
 #include <sstream>
 #include <stdio.h>
@@ -16,6 +12,10 @@
 // include sys/stat.h after sys/types.h
 #include <sys/stat.h>
 
+#include "cmCPackGenerator.h"
+#include "cmCPackLog.h"
+#include "cmSystemTools.h"
+
 cmCPackSTGZGenerator::cmCPackSTGZGenerator()
 {
 }
diff --git a/Source/CPack/cpack.cxx b/Source/CPack/cpack.cxx
index 06472c6..fa526ae 100644
--- a/Source/CPack/cpack.cxx
+++ b/Source/CPack/cpack.cxx
@@ -2,6 +2,20 @@
    file Copyright.txt or https://cmake.org/licensing for details.  */
 #include <cmConfigure.h>
 
+#include <cmsys/CommandLineArguments.hxx>
+#include <cmsys/Encoding.hxx>
+#include <iostream>
+#include <map>
+#include <sstream>
+#include <stddef.h>
+#include <string>
+#include <utility>
+#include <vector>
+
+#if defined(_WIN32) && defined(CMAKE_BUILD_WITH_CMAKE)
+#include <cmsys/ConsoleBuf.hxx>
+#endif
+
 #include "cmCPackGenerator.h"
 #include "cmCPackGeneratorFactory.h"
 #include "cmCPackLog.h"
@@ -10,24 +24,11 @@
 #include "cmGlobalGenerator.h"
 #include "cmMakefile.h"
 #include "cmState.h"
-#include "cmStateTypes.h"
+#include "cmStateSnapshot.h"
 #include "cmSystemTools.h"
 #include "cm_auto_ptr.hxx"
 #include "cmake.h"
 
-#include <cmsys/CommandLineArguments.hxx>
-#include <cmsys/Encoding.hxx>
-#if defined(_WIN32) && defined(CMAKE_BUILD_WITH_CMAKE)
-#include <cmsys/ConsoleBuf.hxx>
-#endif
-#include <iostream>
-#include <map>
-#include <sstream>
-#include <stddef.h>
-#include <string>
-#include <utility>
-#include <vector>
-
 static const char* cmDocumentationName[][2] = {
   { CM_NULLPTR, "  cpack - Packaging driver provided by CMake." },
   { CM_NULLPTR, CM_NULLPTR }
diff --git a/Source/CTest/cmCTestGIT.cxx b/Source/CTest/cmCTestGIT.cxx
index 20512ea..d30f6b3 100644
--- a/Source/CTest/cmCTestGIT.cxx
+++ b/Source/CTest/cmCTestGIT.cxx
@@ -2,12 +2,6 @@
    file Copyright.txt or https://cmake.org/licensing for details.  */
 #include "cmCTestGIT.h"
 
-#include "cmAlgorithms.h"
-#include "cmCTest.h"
-#include "cmCTestVC.h"
-#include "cmProcessTools.h"
-#include "cmSystemTools.h"
-
 #include <cmsys/FStream.hxx>
 #include <cmsys/Process.h>
 #include <ctype.h>
@@ -16,6 +10,13 @@
 #include <time.h>
 #include <vector>
 
+#include "cmAlgorithms.h"
+#include "cmCTest.h"
+#include "cmCTestVC.h"
+#include "cmProcessOutput.h"
+#include "cmProcessTools.h"
+#include "cmSystemTools.h"
+
 static unsigned int cmCTestGITVersion(unsigned int epic, unsigned int major,
                                       unsigned int minor, unsigned int fix)
 {
diff --git a/Source/CTest/cmCTestGenericHandler.cxx b/Source/CTest/cmCTestGenericHandler.cxx
index c093cc6..7638f45 100644
--- a/Source/CTest/cmCTestGenericHandler.cxx
+++ b/Source/CTest/cmCTestGenericHandler.cxx
@@ -2,12 +2,13 @@
    file Copyright.txt or https://cmake.org/licensing for details.  */
 #include "cmCTestGenericHandler.h"
 
-#include "cmCTest.h"
-#include "cmSystemTools.h"
-
+#include <cmConfigure.h>
 #include <sstream>
 #include <utility>
 
+#include "cmCTest.h"
+#include "cmSystemTools.h"
+
 cmCTestGenericHandler::cmCTestGenericHandler()
 {
   this->HandlerVerbose = cmSystemTools::OUTPUT_NONE;
diff --git a/Source/CTest/cmCTestGenericHandler.h b/Source/CTest/cmCTestGenericHandler.h
index 4176eb2..2ebbe70 100644
--- a/Source/CTest/cmCTestGenericHandler.h
+++ b/Source/CTest/cmCTestGenericHandler.h
@@ -3,16 +3,16 @@
 #ifndef cmCTestGenericHandler_h
 #define cmCTestGenericHandler_h
 
-#include <cmConfigure.h>
-
-#include "cmCTest.h"
-#include "cmSystemTools.h"
+#include <cmConfigure.h> // IWYU pragma: keep
 
 #include <map>
 #include <stddef.h>
 #include <string>
 #include <vector>
 
+#include "cmCTest.h"
+#include "cmSystemTools.h"
+
 class cmCTestCommand;
 class cmGeneratedFileStream;
 class cmMakefile;
diff --git a/Source/CTest/cmCTestLaunch.cxx b/Source/CTest/cmCTestLaunch.cxx
index 43c0fef..03e0319 100644
--- a/Source/CTest/cmCTestLaunch.cxx
+++ b/Source/CTest/cmCTestLaunch.cxx
@@ -4,24 +4,24 @@
 
 #include <cmConfigure.h>
 
+#include <cmsys/FStream.hxx>
+#include <cmsys/Process.h>
+#include <cmsys/RegularExpression.hxx>
+#include <iostream>
+#include <stdlib.h>
+#include <string.h>
+
 #include "cmCryptoHash.h"
 #include "cmGeneratedFileStream.h"
 #include "cmGlobalGenerator.h"
 #include "cmMakefile.h"
 #include "cmProcessOutput.h"
-#include "cmStateTypes.h"
+#include "cmStateSnapshot.h"
 #include "cmSystemTools.h"
 #include "cmXMLWriter.h"
+#include "cm_auto_ptr.hxx"
 #include "cmake.h"
 
-#include <cm_auto_ptr.hxx>
-#include <cmsys/FStream.hxx>
-#include <cmsys/Process.h>
-#include <cmsys/RegularExpression.hxx>
-#include <iostream>
-#include <stdlib.h>
-#include <string.h>
-
 #ifdef _WIN32
 #include <fcntl.h> // for _O_BINARY
 #include <io.h>    // for _setmode
diff --git a/Source/CTest/cmCTestMemCheckCommand.cxx b/Source/CTest/cmCTestMemCheckCommand.cxx
index 5e4c5ae..fd7c3a9 100644
--- a/Source/CTest/cmCTestMemCheckCommand.cxx
+++ b/Source/CTest/cmCTestMemCheckCommand.cxx
@@ -2,6 +2,9 @@
    file Copyright.txt or https://cmake.org/licensing for details.  */
 #include "cmCTestMemCheckCommand.h"
 
+#include <sstream>
+#include <vector>
+
 #include "cmCTest.h"
 #include "cmCTestGenericHandler.h"
 #include "cmCTestMemCheckHandler.h"
diff --git a/Source/CTest/cmCTestRunTest.h b/Source/CTest/cmCTestRunTest.h
index a10e271..ee4630a 100644
--- a/Source/CTest/cmCTestRunTest.h
+++ b/Source/CTest/cmCTestRunTest.h
@@ -5,11 +5,13 @@
 
 #include <cmConfigure.h> // IWYU pragma: keep
 
-#include <cmCTestTestHandler.h>
+#include <set>
 #include <stddef.h>
 #include <string>
 #include <vector>
 
+#include "cmCTestTestHandler.h"
+
 class cmCTest;
 class cmProcess;
 
diff --git a/Source/CTest/cmCTestScriptHandler.cxx b/Source/CTest/cmCTestScriptHandler.cxx
index 08ea4ee..b537242 100644
--- a/Source/CTest/cmCTestScriptHandler.cxx
+++ b/Source/CTest/cmCTestScriptHandler.cxx
@@ -2,6 +2,15 @@
    file Copyright.txt or https://cmake.org/licensing for details.  */
 #include "cmCTestScriptHandler.h"
 
+#include <cmsys/Directory.hxx>
+#include <cmsys/Process.h>
+#include <map>
+#include <sstream>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <utility>
+
 #include "cmCTest.h"
 #include "cmCTestBuildCommand.h"
 #include "cmCTestCommand.h"
@@ -23,19 +32,10 @@
 #include "cmMakefile.h"
 #include "cmState.h"
 #include "cmStateDirectory.h"
-#include "cmStateTypes.h"
+#include "cmStateSnapshot.h"
 #include "cmSystemTools.h"
 #include "cmake.h"
 
-#include <cmsys/Directory.hxx>
-#include <cmsys/Process.h>
-#include <map>
-#include <sstream>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <utility>
-
 #ifdef _WIN32
 #include <windows.h>
 #else
diff --git a/Source/CTest/cmCTestSubmitHandler.cxx b/Source/CTest/cmCTestSubmitHandler.cxx
index 2b2d207..0f13c1e 100644
--- a/Source/CTest/cmCTestSubmitHandler.cxx
+++ b/Source/CTest/cmCTestSubmitHandler.cxx
@@ -2,6 +2,14 @@
    file Copyright.txt or https://cmake.org/licensing for details.  */
 #include "cmCTestSubmitHandler.h"
 
+#include <cm_curl.h>
+#include <cm_jsoncpp_reader.h>
+#include <cm_jsoncpp_value.h>
+#include <cmsys/Process.h>
+#include <sstream>
+#include <stdio.h>
+#include <stdlib.h>
+
 #include "cmCTest.h"
 #include "cmCTestCurl.h"
 #include "cmCTestScriptHandler.h"
@@ -9,19 +17,11 @@
 #include "cmGeneratedFileStream.h"
 #include "cmProcessOutput.h"
 #include "cmState.h"
-#include "cmStateTypes.h"
 #include "cmSystemTools.h"
+#include "cmThirdParty.h"
 #include "cmXMLParser.h"
 #include "cmake.h"
 
-#include <cm_curl.h>
-#include <cm_jsoncpp_reader.h>
-#include <cm_jsoncpp_value.h>
-#include <cmsys/Process.h>
-#include <sstream>
-#include <stdio.h>
-#include <stdlib.h>
-
 #if defined(CTEST_USE_XMLRPC)
 #include "cmVersion.h"
 #include <cm_xmlrpc.h>
diff --git a/Source/CTest/cmCTestTestHandler.cxx b/Source/CTest/cmCTestTestHandler.cxx
index 132d049..ab43dbc 100644
--- a/Source/CTest/cmCTestTestHandler.cxx
+++ b/Source/CTest/cmCTestTestHandler.cxx
@@ -2,21 +2,6 @@
    file Copyright.txt or https://cmake.org/licensing for details.  */
 #include "cmCTestTestHandler.h"
 
-#include "cmCTest.h"
-#include "cmCTestBatchTestHandler.h"
-#include "cmCTestMultiProcessHandler.h"
-#include "cmCommand.h"
-#include "cmGeneratedFileStream.h"
-#include "cmGlobalGenerator.h"
-#include "cmMakefile.h"
-#include "cmState.h"
-#include "cmStateTypes.h"
-#include "cmSystemTools.h"
-#include "cmXMLWriter.h"
-#include "cm_auto_ptr.hxx"
-#include "cm_utf8.h"
-#include "cmake.h"
-
 #include <algorithm>
 #include <cmsys/Base64.h>
 #include <cmsys/Directory.hxx>
@@ -32,6 +17,21 @@
 #include <string.h>
 #include <time.h>
 
+#include "cmCTest.h"
+#include "cmCTestBatchTestHandler.h"
+#include "cmCTestMultiProcessHandler.h"
+#include "cmCommand.h"
+#include "cmGeneratedFileStream.h"
+#include "cmGlobalGenerator.h"
+#include "cmMakefile.h"
+#include "cmState.h"
+#include "cmStateSnapshot.h"
+#include "cmSystemTools.h"
+#include "cmXMLWriter.h"
+#include "cm_auto_ptr.hxx"
+#include "cm_utf8.h"
+#include "cmake.h"
+
 class cmExecutionStatus;
 
 class cmCTestSubdirCommand : public cmCommand
diff --git a/Source/CTest/cmCTestUploadCommand.cxx b/Source/CTest/cmCTestUploadCommand.cxx
index 9266bce..717117a 100644
--- a/Source/CTest/cmCTestUploadCommand.cxx
+++ b/Source/CTest/cmCTestUploadCommand.cxx
@@ -2,6 +2,9 @@
    file Copyright.txt or https://cmake.org/licensing for details.  */
 #include "cmCTestUploadCommand.h"
 
+#include <sstream>
+#include <vector>
+
 #include "cmCTest.h"
 #include "cmCTestGenericHandler.h"
 #include "cmCTestUploadHandler.h"
@@ -9,8 +12,6 @@
 #include "cmSystemTools.h"
 #include "cmake.h"
 
-#include <sstream>
-
 cmCTestGenericHandler* cmCTestUploadCommand::InitializeHandler()
 {
   cmCTestGenericHandler* handler =
diff --git a/Source/CTest/cmCTestVC.h b/Source/CTest/cmCTestVC.h
index dd8b973..2681ba0 100644
--- a/Source/CTest/cmCTestVC.h
+++ b/Source/CTest/cmCTestVC.h
@@ -5,11 +5,12 @@
 
 #include <cmConfigure.h>
 
-#include "cmProcessTools.h"
-
 #include <iosfwd>
 #include <string>
 
+#include "cmProcessOutput.h"
+#include "cmProcessTools.h"
+
 class cmCTest;
 class cmXMLWriter;
 
diff --git a/Source/cmCTest.h b/Source/cmCTest.h
index 4436327..8db2e5f 100644
--- a/Source/cmCTest.h
+++ b/Source/cmCTest.h
@@ -14,6 +14,7 @@
 #include <time.h>
 #include <vector>
 
+class cmCTest;
 class cmCTestGenericHandler;
 class cmCTestStartCommand;
 class cmGeneratedFileStream;
diff --git a/Source/cmCryptoHash.h b/Source/cmCryptoHash.h
index 26d55b3..0b562da 100644
--- a/Source/cmCryptoHash.h
+++ b/Source/cmCryptoHash.h
@@ -3,12 +3,14 @@
 #ifndef cmCryptoHash_h
 #define cmCryptoHash_h
 
-#include <cmConfigure.h>
+#include <cmConfigure.h> // IWYU pragma: keep
 
-#include <cm_auto_ptr.hxx>
+#include <stddef.h>
 #include <string>
 #include <vector>
 
+#include "cm_auto_ptr.hxx"
+
 /**
  * @brief Abstract base class for cryptographic hash generators
  */
diff --git a/Source/cmFileCommand.cxx b/Source/cmFileCommand.cxx
index c2e37c1..2f6238b 100644
--- a/Source/cmFileCommand.cxx
+++ b/Source/cmFileCommand.cxx
@@ -2,15 +2,39 @@
    file Copyright.txt or https://cmake.org/licensing for details.  */
 #include "cmFileCommand.h"
 
+#include <algorithm>
+#include <assert.h>
+#include <cm_kwiml.h>
+#include <cmsys/Directory.hxx>
+#include <cmsys/FStream.hxx>
+#include <cmsys/Glob.hxx>
+#include <cmsys/RegularExpression.hxx>
+#include <cmsys/String.hxx>
+#include <list>
+#include <sstream>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <sys/types.h>
+// include sys/stat.h after sys/types.h
+#include <sys/stat.h>
+
 #include "cmAlgorithms.h"
+#include "cmCommandArgumentsHelper.h"
 #include "cmCryptoHash.h"
-#include "cmCryptoHash.h"
+#include "cmFileLockPool.h"
 #include "cmFileTimeComparison.h"
+#include "cmGeneratorExpression.h"
 #include "cmGlobalGenerator.h"
 #include "cmHexFileConverter.h"
 #include "cmInstallType.h"
+#include "cmListFileCache.h"
 #include "cmMakefile.h"
+#include "cmPolicies.h"
+#include "cmSystemTools.h"
 #include "cmTimestamp.h"
+#include "cm_auto_ptr.hxx"
 #include "cmake.h"
 
 #if defined(CMAKE_BUILD_WITH_CMAKE)
@@ -18,20 +42,7 @@
 #include "cmFileLockResult.h"
 #endif
 
-#undef GetCurrentDirectory
-#include <assert.h>
-#include <stdlib.h>
-
-#include <sys/types.h>
-// include sys/stat.h after sys/types.h
-#include <sys/stat.h>
-
-#include <cm_auto_ptr.hxx>
-#include <cmsys/Directory.hxx>
-#include <cmsys/Encoding.hxx>
-#include <cmsys/FStream.hxx>
-#include <cmsys/Glob.hxx>
-#include <cmsys/RegularExpression.hxx>
+class cmSystemToolsFileTime;
 
 // Table of permissions flags.
 #if defined(_WIN32) && !defined(__CYGWIN__)
diff --git a/Source/cmProcessOutput.h b/Source/cmProcessOutput.h
index d7a5e98..6a4e7d5 100644
--- a/Source/cmProcessOutput.h
+++ b/Source/cmProcessOutput.h
@@ -5,6 +5,7 @@
 
 #include <cmConfigure.h> // IWYU pragma: keep
 
+#include <stddef.h>
 #include <string>
 #include <vector>
 
diff --git a/Tests/CMakeLib/testFindPackageCommand.cxx b/Tests/CMakeLib/testFindPackageCommand.cxx
index 7622756..bfd429f 100644
--- a/Tests/CMakeLib/testFindPackageCommand.cxx
+++ b/Tests/CMakeLib/testFindPackageCommand.cxx
@@ -1,9 +1,13 @@
 /* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
    file Copyright.txt or https://cmake.org/licensing for details.  */
-#include "cmFindPackageCommand.h"
+
+#include <cmConfigure.h> // IWYU pragma: keep
 
 #include <iostream>
 #include <string>
+#include <vector>
+
+#include "cmFindPackageCommand.h"
 
 #define cmPassed(m) std::cout << "Passed: " << (m) << "\n"
 #define cmFailed(m)                                                           \
diff --git a/Tests/CMakeLib/testSystemTools.cxx b/Tests/CMakeLib/testSystemTools.cxx
index b16b088..0dfa326 100644
--- a/Tests/CMakeLib/testSystemTools.cxx
+++ b/Tests/CMakeLib/testSystemTools.cxx
@@ -1,9 +1,14 @@
 /* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
    file Copyright.txt or https://cmake.org/licensing for details.  */
-#include "cmSystemTools.h"
+
+#include <cmConfigure.h> // IWYU pragma: keep
 
 #include <iostream>
+#include <stddef.h>
 #include <string>
+#include <vector>
+
+#include "cmSystemTools.h"
 
 #define cmPassed(m) std::cout << "Passed: " << (m) << "\n"
 #define cmFailed(m)                                                           \
diff --git a/Tests/CMakeLib/testXMLSafe.cxx b/Tests/CMakeLib/testXMLSafe.cxx
index 6c59128..fe776c5 100644
--- a/Tests/CMakeLib/testXMLSafe.cxx
+++ b/Tests/CMakeLib/testXMLSafe.cxx
@@ -1,11 +1,14 @@
 /* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
    file Copyright.txt or https://cmake.org/licensing for details.  */
-#include "cmXMLSafe.h"
+
+#include <cmConfigure.h>
 
 #include <sstream>
 #include <stdio.h>
 #include <string>
 
+#include "cmXMLSafe.h"
+
 struct test_pair
 {
   const char* in;