cmstd: Modernize CMake system headers

Provide a standardized way to handle the C++ "standard" headers
customized to be used with current CMake C++ standard constraints.
Offer under directory `cm` headers which can be used as direct
replacements of the standard ones.  For example:

    #include <cm/string_view>

can be used safely for CMake development in place of the `<string_view>`
standard header.

Fixes: #19491

18 files changed, 20 insertions, 18 deletions

diff --git a/Source/CTest/cmCTestBuildCommand.h b/Source/CTest/cmCTestBuildCommand.h
index a62c301..14f70bf 100644
--- a/Source/CTest/cmCTestBuildCommand.h
+++ b/Source/CTest/cmCTestBuildCommand.h
@@ -12,7 +12,7 @@
 #include <utility>
 #include <vector>
 
-#include "cm_memory.hxx"
+#include <cm/memory>
 
 class cmCTestBuildHandler;
 class cmCTestGenericHandler;
diff --git a/Source/CTest/cmCTestCVS.cxx b/Source/CTest/cmCTestCVS.cxx
index b9b90c8..5baeecd 100644
--- a/Source/CTest/cmCTestCVS.cxx
+++ b/Source/CTest/cmCTestCVS.cxx
@@ -7,10 +7,12 @@
 #include "cmStringAlgorithms.h"
 #include "cmSystemTools.h"
 #include "cmXMLWriter.h"
-#include "cm_string_view.hxx"
 
 #include "cmsys/FStream.hxx"
 #include "cmsys/RegularExpression.hxx"
+
+#include <cm/string_view>
+
 #include <utility>
 
 cmCTestCVS::cmCTestCVS(cmCTest* ct, std::ostream& log)
diff --git a/Source/CTest/cmCTestConfigureCommand.h b/Source/CTest/cmCTestConfigureCommand.h
index 4677c83..36ca7d5 100644
--- a/Source/CTest/cmCTestConfigureCommand.h
+++ b/Source/CTest/cmCTestConfigureCommand.h
@@ -11,7 +11,7 @@
 #include <string>
 #include <utility>
 
-#include "cm_memory.hxx"
+#include <cm/memory>
 
 class cmCTestGenericHandler;
 
diff --git a/Source/CTest/cmCTestCoverageCommand.h b/Source/CTest/cmCTestCoverageCommand.h
index 24b96c0..75aefdf 100644
--- a/Source/CTest/cmCTestCoverageCommand.h
+++ b/Source/CTest/cmCTestCoverageCommand.h
@@ -12,7 +12,7 @@
 #include <string>
 #include <utility>
 
-#include "cm_memory.hxx"
+#include <cm/memory>
 
 class cmCTestGenericHandler;
 
diff --git a/Source/CTest/cmCTestEmptyBinaryDirectoryCommand.h b/Source/CTest/cmCTestEmptyBinaryDirectoryCommand.h
index 84250cb..4232b9e 100644
--- a/Source/CTest/cmCTestEmptyBinaryDirectoryCommand.h
+++ b/Source/CTest/cmCTestEmptyBinaryDirectoryCommand.h
@@ -12,7 +12,7 @@
 #include <utility>
 #include <vector>
 
-#include "cm_memory.hxx"
+#include <cm/memory>
 
 class cmExecutionStatus;
 
diff --git a/Source/CTest/cmCTestMemCheckCommand.h b/Source/CTest/cmCTestMemCheckCommand.h
index 837a687..5dad4e7 100644
--- a/Source/CTest/cmCTestMemCheckCommand.h
+++ b/Source/CTest/cmCTestMemCheckCommand.h
@@ -7,7 +7,7 @@
 
 #include <utility>
 
-#include "cm_memory.hxx"
+#include <cm/memory>
 
 #include "cmCTestTestCommand.h"
 #include "cmCommand.h"
diff --git a/Source/CTest/cmCTestReadCustomFilesCommand.h b/Source/CTest/cmCTestReadCustomFilesCommand.h
index db2ac5e..8199cbc 100644
--- a/Source/CTest/cmCTestReadCustomFilesCommand.h
+++ b/Source/CTest/cmCTestReadCustomFilesCommand.h
@@ -12,7 +12,7 @@
 #include <utility>
 #include <vector>
 
-#include "cm_memory.hxx"
+#include <cm/memory>
 
 class cmExecutionStatus;
 
diff --git a/Source/CTest/cmCTestRunScriptCommand.h b/Source/CTest/cmCTestRunScriptCommand.h
index 6961f6e..d262a83 100644
--- a/Source/CTest/cmCTestRunScriptCommand.h
+++ b/Source/CTest/cmCTestRunScriptCommand.h
@@ -12,7 +12,7 @@
 #include <utility>
 #include <vector>
 
-#include "cm_memory.hxx"
+#include <cm/memory>
 
 class cmExecutionStatus;
 
diff --git a/Source/CTest/cmCTestRunTest.cxx b/Source/CTest/cmCTestRunTest.cxx
index 3629a50..d8a5923 100644
--- a/Source/CTest/cmCTestRunTest.cxx
+++ b/Source/CTest/cmCTestRunTest.cxx
@@ -20,7 +20,7 @@
 #include <sstream>
 #include <utility>
 
-#include "cm_memory.hxx"
+#include <cm/memory>
 
 cmCTestRunTest::cmCTestRunTest(cmCTestMultiProcessHandler& multiHandler)
   : MultiTestHandler(multiHandler)
diff --git a/Source/CTest/cmCTestScriptHandler.cxx b/Source/CTest/cmCTestScriptHandler.cxx
index 354e3c4..c988e3a 100644
--- a/Source/CTest/cmCTestScriptHandler.cxx
+++ b/Source/CTest/cmCTestScriptHandler.cxx
@@ -5,7 +5,7 @@
 #include "cmsys/Directory.hxx"
 #include "cmsys/Process.h"
 
-#include "cm_memory.hxx"
+#include <cm/memory>
 
 #include "cmCTest.h"
 #include "cmCTestBuildCommand.h"
diff --git a/Source/CTest/cmCTestSleepCommand.h b/Source/CTest/cmCTestSleepCommand.h
index 7b17081..b98079d 100644
--- a/Source/CTest/cmCTestSleepCommand.h
+++ b/Source/CTest/cmCTestSleepCommand.h
@@ -12,7 +12,7 @@
 #include <utility>
 #include <vector>
 
-#include "cm_memory.hxx"
+#include <cm/memory>
 
 class cmExecutionStatus;
 
diff --git a/Source/CTest/cmCTestStartCommand.h b/Source/CTest/cmCTestStartCommand.h
index 7c71f36..598c937 100644
--- a/Source/CTest/cmCTestStartCommand.h
+++ b/Source/CTest/cmCTestStartCommand.h
@@ -13,7 +13,7 @@
 #include <utility>
 #include <vector>
 
-#include "cm_memory.hxx"
+#include <cm/memory>
 
 class cmExecutionStatus;
 
diff --git a/Source/CTest/cmCTestSubmitCommand.cxx b/Source/CTest/cmCTestSubmitCommand.cxx
index d16aac0..2e2cf1a 100644
--- a/Source/CTest/cmCTestSubmitCommand.cxx
+++ b/Source/CTest/cmCTestSubmitCommand.cxx
@@ -13,7 +13,7 @@
 #include <sstream>
 #include <utility>
 
-#include "cm_memory.hxx"
+#include <cm/memory>
 
 class cmExecutionStatus;
 
diff --git a/Source/CTest/cmCTestTestCommand.h b/Source/CTest/cmCTestTestCommand.h
index d74136c..a9ba3ab 100644
--- a/Source/CTest/cmCTestTestCommand.h
+++ b/Source/CTest/cmCTestTestCommand.h
@@ -11,7 +11,7 @@
 #include <string>
 #include <utility>
 
-#include "cm_memory.hxx"
+#include <cm/memory>
 
 class cmCTestGenericHandler;
 
diff --git a/Source/CTest/cmCTestTestHandler.cxx b/Source/CTest/cmCTestTestHandler.cxx
index 10f9f9b..ee0d8c8 100644
--- a/Source/CTest/cmCTestTestHandler.cxx
+++ b/Source/CTest/cmCTestTestHandler.cxx
@@ -2,7 +2,7 @@
    file Copyright.txt or https://cmake.org/licensing for details.  */
 #include "cmCTestTestHandler.h"
 
-#include "cm_memory.hxx"
+#include <cm/memory>
 
 #include "cmAlgorithms.h"
 #include "cmCTest.h"
diff --git a/Source/CTest/cmCTestUpdateCommand.h b/Source/CTest/cmCTestUpdateCommand.h
index 55c4b80..5b0e07e 100644
--- a/Source/CTest/cmCTestUpdateCommand.h
+++ b/Source/CTest/cmCTestUpdateCommand.h
@@ -11,7 +11,7 @@
 #include <string>
 #include <utility>
 
-#include "cm_memory.hxx"
+#include <cm/memory>
 
 class cmCTestGenericHandler;
 
diff --git a/Source/CTest/cmCTestUpdateHandler.cxx b/Source/CTest/cmCTestUpdateHandler.cxx
index a6a3542..c4cb233 100644
--- a/Source/CTest/cmCTestUpdateHandler.cxx
+++ b/Source/CTest/cmCTestUpdateHandler.cxx
@@ -20,7 +20,7 @@
 #include <chrono>
 #include <sstream>
 
-#include "cm_memory.hxx"
+#include <cm/memory>
 
 static const char* cmCTestUpdateHandlerUpdateStrings[] = {
   "Unknown", "CVS", "SVN", "BZR", "GIT", "HG", "P4"
diff --git a/Source/CTest/cmCTestUploadCommand.h b/Source/CTest/cmCTestUploadCommand.h
index 9e49769..39314f2 100644
--- a/Source/CTest/cmCTestUploadCommand.h
+++ b/Source/CTest/cmCTestUploadCommand.h
@@ -12,7 +12,7 @@
 #include <string>
 #include <utility>
 
-#include "cm_memory.hxx"
+#include <cm/memory>
 
 class cmCTestGenericHandler;