ENH: Add cmMakefile::NeedBackwardsCompatibility method to pass through to cmLocalGenerator::NeedBackwardsCompatibility for convenience.

Source/cmMakefile.cxx

@@ -527,6 +527,21 @@ void cmMakefile::SetLocalGenerator(cmLocalGenerator* lg)
   this->LocalGenerator = lg;
 }
 
+bool cmMakefile::NeedBackwardsCompatibility(unsigned int major,
+                                            unsigned int minor,
+                                            unsigned int patch)
+{
+  if(this->LocalGenerator)
+    {
+    return
+      this->LocalGenerator->NeedBackwardsCompatibility(major, minor, patch);
+    }
+  else
+    {
+    return false;
+    }
+}
+
 void cmMakefile::FinalPass()
 {
   // do all the variable expansions here

Source/cmMakefile.h

@@ -122,6 +122,13 @@ public:
   cmLocalGenerator* GetLocalGenerator() 
     { return this->LocalGenerator;}
 
+  /**
+   * Test whether compatibility is set to a given version or lower.
+   */
+  bool NeedBackwardsCompatibility(unsigned int major,
+                                  unsigned int minor,
+                                  unsigned int patch = 0xFFu);
+
   /**
    * Perform FinalPass, Library dependency analysis etc before output of the
    * makefile.