ENH: clean up some policy stuff and interactions with CMAKE_BACKWARDS_COMPATIBILITY and CMAKE_MINIMUM_REQUIRED

1 files changed, 26 insertions, 0 deletions

diff --git a/Source/cmake.cxx b/Source/cmake.cxx
index 31693d2..e9d92b3 100644
--- a/Source/cmake.cxx
+++ b/Source/cmake.cxx
@@ -1899,6 +1899,19 @@ int cmake::ActualConfigure()
        cmCacheManager::INTERNAL);
     }
 
+  // set the default BACKWARDS compatibility to the current version
+  if(!this->CacheManager->GetCacheValue("CMAKE_BACKWARDS_COMPATIBILITY"))
+    {
+    char ver[256];
+    sprintf(ver,"%i.%i",cmVersion::GetMajorVersion(),
+            cmVersion::GetMinorVersion());
+    this->CacheManager->AddCacheEntry
+      ("CMAKE_BACKWARDS_COMPATIBILITY",ver, 
+       "For backwards compatibility, what version of CMake commands and "
+       "syntax should this version of CMake allow.",
+       cmCacheManager::INTERNAL);
+    }
+
   // no generator specified on the command line
   if(!this->GlobalGenerator)
     {
@@ -2380,6 +2393,19 @@ int cmake::LoadCache()
     return -3;
     }
 
+  // set the default BACKWARDS compatibility to the current version
+  if(!this->CacheManager->GetCacheValue("CMAKE_BACKWARDS_COMPATIBILITY"))
+    {
+    char ver[256];
+    sprintf(ver,"%i.%i",cmVersion::GetMajorVersion(),
+            cmVersion::GetMinorVersion());
+    this->CacheManager->AddCacheEntry
+      ("CMAKE_BACKWARDS_COMPATIBILITY",ver, 
+       "For backwards compatibility, what version of CMake commands and "
+       "syntax should this version of CMake allow.",
+       cmCacheManager::INTERNAL);
+    }
+
   return 0;
 }