message: Add a DEPRECATION mode

By default, the message is not issued. If CMAKE_ERROR_DEPRECATED
is on, the message is fatal. If CMAKE_WARN_DEPRECATED is on, the
message is a warning.

4 files changed, 34 insertions, 4 deletions

diff --git a/Source/cmMessageCommand.cxx b/Source/cmMessageCommand.cxx
index e1dbf34..d85e720 100644
--- a/Source/cmMessageCommand.cxx
+++ b/Source/cmMessageCommand.cxx
@@ -52,6 +52,23 @@ bool cmMessageCommand
     status = true;
     ++i;
     }
+  else if (*i == "DEPRECATION")
+    {
+    if (this->Makefile->IsOn("CMAKE_ERROR_DEPRECATED"))
+      {
+      fatal = true;
+      type = cmake::DEPRECATION_ERROR;
+      }
+    else if (this->Makefile->IsOn("CMAKE_WARN_DEPRECATED"))
+      {
+      type = cmake::DEPRECATION_WARNING;
+      }
+    else
+      {
+      return true;
+      }
+    ++i;
+    }
 
   for(;i != args.end(); ++i)
     {
diff --git a/Source/cmMessageCommand.h b/Source/cmMessageCommand.h
index fc61810..a053bdd 100644
--- a/Source/cmMessageCommand.h
+++ b/Source/cmMessageCommand.h
@@ -60,9 +60,8 @@ public:
   virtual const char* GetFullDocumentation() const
     {
     return
-      "  message([STATUS|WARNING|AUTHOR_WARNING|FATAL_ERROR|SEND_ERROR]\n"
-      "          \"message to display\" ...)\n"
-      "The optional keyword determines the type of message:\n"
+      "  message([<mode>] \"message to display\" ...)\n"
+      "The optional <mode> keyword determines the type of message:\n"
       "  (none)         = Important information\n"
       "  STATUS         = Incidental information\n"
       "  WARNING        = CMake Warning, continue processing\n"
@@ -70,6 +69,9 @@ public:
       "  SEND_ERROR     = CMake Error, continue processing,\n"
       "                                but skip generation\n"
       "  FATAL_ERROR    = CMake Error, stop processing and generation\n"
+      "  DEPRECATION    = CMake Deprecation Error or Warning if variable\n"
+      "                   CMAKE_ERROR_DEPRECATED or CMAKE_WARN_DEPRECATED\n"
+      "                   is enabled, respectively, else no message.\n"
       "The CMake command-line tool displays STATUS messages on stdout "
       "and all other message types on stderr.  "
       "The CMake GUI displays all messages in its log area.  "
diff --git a/Source/cmake.cxx b/Source/cmake.cxx
index 2249323..d2961c0 100644
--- a/Source/cmake.cxx
+++ b/Source/cmake.cxx
@@ -3127,6 +3127,15 @@ void cmake::IssueMessage(cmake::MessageType t, std::string const& text,
     {
     msg << "CMake Debug Log";
     }
+  else if(t == cmake::DEPRECATION_ERROR)
+    {
+    msg << "CMake Deprecation Error";
+    isError = true;
+    }
+  else if (t == cmake::DEPRECATION_WARNING)
+    {
+    msg << "CMake Deprecation Warning";
+    }
   else
     {
     msg << "CMake Warning";
diff --git a/Source/cmake.h b/Source/cmake.h
index ccf91e3..d33ba34 100644
--- a/Source/cmake.h
+++ b/Source/cmake.h
@@ -65,7 +65,9 @@ class cmake
     INTERNAL_ERROR,
     MESSAGE,
     WARNING,
-    LOG
+    LOG,
+    DEPRECATION_ERROR,
+    DEPRECATION_WARNING
   };