ENH: Further centralized custom command dependency computation. Custom command dependencies in the source tree may now also be specified relative to the source directory.

Source/cmLocalGenerator.cxx

@@ -1620,8 +1620,7 @@ void cmLocalGenerator::AddLanguageFlags(std::string& flags,
 
 //----------------------------------------------------------------------------
 std::string cmLocalGenerator::GetRealDependency(const char* inName,
-                                                const char* config,
-                                                bool* inLocal)
+                                                const char* config)
 {
   // Older CMake code may specify the dependency using the target
   // output file rather than the target name.  Such code would have
@@ -1634,22 +1633,8 @@ std::string cmLocalGenerator::GetRealDependency(const char* inName,
     name = cmSystemTools::GetFilenameWithoutLastExtension(name);
     }
 
-  // Look for a CMake target in the current makefile.
-  cmTarget* target = m_Makefile->FindTarget(name.c_str());
-
-  // If no target was found in the current makefile search globally.
-  bool local = target?true:false;
-  if(inLocal)
-    {
-    *inLocal = local;
-    }
-  if(!local)
-    {
-    target = m_GlobalGenerator->FindTarget(0, name.c_str());
-    }
-
-  // If a target was found then get its real location.
-  if(target)
+  // Look for a CMake target with the given name.
+  if(cmTarget* target = m_GlobalGenerator->FindTarget(0, name.c_str()))
     {
     switch (target->GetType())
       {
@@ -1666,15 +1651,30 @@ std::string cmLocalGenerator::GetRealDependency(const char* inName,
         }
         break;
       case cmTarget::UTILITY:
+        // Depending on a utility target may not work but just trust
+        // the user to have given a valid name.
+        return inName;
       case cmTarget::INSTALL_FILES:
       case cmTarget::INSTALL_PROGRAMS:
         break;
       }
     }
 
-  // The name was not that of a CMake target.  The dependency should
-  // use the name as given.
-  return inName;
+  // The name was not that of a CMake target.  It must name a file.
+  if(cmSystemTools::FileIsFullPath(inName))
+    {
+    // This is a full path.  Return it as given.
+    return inName;
+    }
+  else
+    {
+    // Treat the name as relative to the source directory in which it
+    // was given.
+    name = m_Makefile->GetCurrentDirectory();
+    name += "/";
+    name += inName;
+    return name;
+    }
 }
 
 //----------------------------------------------------------------------------

Source/cmLocalGenerator.h

@@ -137,12 +137,12 @@ public:
   /** Translate a dependency as given in CMake code to the name to
       appear in a generated build file.  If the given name is that of
       a CMake target it will be transformed to the real output
-      location of that target for the given configuration.  Otherwise
-      the original name will be returned.  If the local argument is
-      given it is set to indicate whethr the name is of a utility
-      target available in the same makefile.  */
-  std::string GetRealDependency(const char* name, const char* config,
-                                bool* local=0);
+      location of that target for the given configuration.  If the
+      given name is the full path to a file it will be returned.
+      Otherwise the name is treated as a relative path with respect to
+      the source directory of this generator.  This should only be
+      used for dependencies of custom commands.  */
+  std::string GetRealDependency(const char* name, const char* config);
 
   ///! for existing files convert to output path and short path if spaces
   std::string ConvertToOutputForExisting(const char* p);

Source/cmLocalUnixMakefileGenerator3.cxx

@@ -2270,6 +2270,7 @@ cmLocalUnixMakefileGenerator3
 ::AppendTargetDepends(std::vector<std::string>& depends,
                       cmTarget& target)
 {
+  // Static libraries never depend on anything for linking.
   if(target.GetType() == cmTarget::STATIC_LIBRARY)
     {
     return;
@@ -2289,48 +2290,17 @@ cmLocalUnixMakefileGenerator3
     // Don't emit the same library twice for this target.
     if(emitted.insert(lib->first).second)
       {
-      // Add this dependency.
-      this->AppendAnyDepend(depends, lib->first.c_str());
-      }
-    }
-}
-
-//----------------------------------------------------------------------------
-void
-cmLocalUnixMakefileGenerator3
-::AppendAnyDepend(std::vector<std::string>& depends, const char* name)
-{
-  // There are a few cases for the name of the target:
-  //  - CMake target.
-  //  - Full path to a file: depend on it.
-  //  - Other format (like -lm): no file on which to depend, do nothing.
-
-  // Lookup the real name of the dependency in case it is a CMake target.
-  bool local;
-  std::string dep = this->GetRealDependency(name,
-                                            m_ConfigurationName.c_str(),
-                                            &local);
-  if(dep == name)
-    {
-    if(local)
-      {
-      // The dependency is on a CMake utility target in the current
-      // makefile.  Just depend on it directly.
-      depends.push_back(name);
-      }
-    else if(cmSystemTools::FileIsFullPath(name))
-      {
-      // This is a path to a file.  Just trust the listfile author
-      // that it will be present or there is a rule to build it.
-      depends.push_back(cmSystemTools::CollapseFullPath(name));
+      // Depend only on other CMake targets.
+      if(cmTarget* tgt = m_GlobalGenerator->FindTarget(0, lib->first.c_str()))
+        {
+        if(const char* location =
+           tgt->GetLocation(m_ConfigurationName.c_str()))
+          {
+          depends.push_back(location);
+          }
+        }
       }
     }
-  else
-    {
-    // The dependency is on a CMake target and has been transformed to
-    // the target's location on disk.
-    depends.push_back(dep);
-    }
 }
 
 //----------------------------------------------------------------------------
@@ -2370,8 +2340,10 @@ cmLocalUnixMakefileGenerator3
   for(std::vector<std::string>::const_iterator d = cc.GetDepends().begin();
       d != cc.GetDepends().end(); ++d)
     {
-    // Add this dependency.
-    this->AppendAnyDepend(depends, d->c_str());
+    // Lookup the real name of the dependency in case it is a CMake target.
+    std::string dep = this->GetRealDependency(d->c_str(),
+                                              m_ConfigurationName.c_str());
+    depends.push_back(dep);
     }
 }
 

Source/cmLocalUnixMakefileGenerator3.h

@@ -327,7 +327,6 @@ protected:
   const char* GetSourceFileLanguage(const cmSourceFile& source);
   std::string ConvertToQuotedOutputPath(const char* p);
 
-  void AppendAnyDepend(std::vector<std::string>& depends, const char* name);
   void AppendRuleDepend(std::vector<std::string>& depends,
                         const char* ruleFileName);
   void AppendCustomDepends(std::vector<std::string>& depends,