VS10: Generate relative source paths when possible (#12570)

Since commit ed0075bd (Use relative paths for custom command inputs,
2011-06-22) CMake generates full paths to source files in VS 10 project
files to avoid trouble with deep source/build tree paths.  However, the VS
10 IDE will not populate the source file property dialog for a file
referenced by full path.  Instead use a relative path when possible.  When
not possible produce a detailed warning explaining the problem and
suggesting use of shorter directory paths.

1 files changed, 14 insertions, 0 deletions

diff --git a/Source/cmGlobalVisualStudio10Generator.h b/Source/cmGlobalVisualStudio10Generator.h
index e2cc14e..4236563 100644
--- a/Source/cmGlobalVisualStudio10Generator.h
+++ b/Source/cmGlobalVisualStudio10Generator.h
@@ -46,6 +46,8 @@ public:
   ///! create the correct local generator
   virtual cmLocalGenerator *CreateLocalGenerator();
 
+  virtual void Generate();
+
   /**
    * Try to determine system infomation such as shared library
    * extension, pthreads, byte order etc.  
@@ -79,10 +81,22 @@ public:
   /** Generate an <output>.rule file path for a given command output.  */
   virtual std::string GenerateRuleFile(std::string const& output) const;
 
+  void PathTooLong(cmTarget* target, cmSourceFile* sf,
+                   std::string const& sfRel);
 protected:
   virtual const char* GetIDEVersion() { return "10.0"; }
 
   std::string PlatformToolset;
   bool ExpressEdition;
+private:
+  struct LongestSourcePath
+  {
+    LongestSourcePath(): Length(0), Target(0), SourceFile(0) {}
+    size_t Length;
+    cmTarget* Target;
+    cmSourceFile* SourceFile;
+    std::string SourceRel;
+  };
+  LongestSourcePath LongestSource;
 };
 #endif