Process generator expressions in the INCLUDE_DIRECTORIES property.

This use of generator expressions, like all others to come which operate
on target properties, must initalize the dag checker.

Source/cmGeneratorTarget.cxx

@@ -17,6 +17,8 @@
 #include "cmComputeLinkInformation.h"
 #include "cmGlobalGenerator.h"
 #include "cmSourceFile.h"
+#include "cmGeneratorExpression.h"
+#include "cmGeneratorExpressionDAGChecker.h"
 
 #include <assert.h>
 
@@ -289,11 +291,27 @@ std::vector<std::string> cmGeneratorTarget::GetIncludeDirectories()
 {
   std::vector<std::string> includes;
   const char *prop = this->Target->GetProperty("INCLUDE_DIRECTORIES");
-  if(prop)
+  if(!prop)
     {
-    cmSystemTools::ExpandListArgument(prop, includes);
+    return includes;
     }
 
+  const char *config = this->Makefile->GetDefinition("CMAKE_BUILD_TYPE");
+  cmListFileBacktrace lfbt;
+  cmGeneratorExpression ge(lfbt);
+
+  cmGeneratorExpressionDAGChecker dagChecker(lfbt,
+                                              this->GetName(),
+                                              "INCLUDE_DIRECTORIES", 0, 0);
+
+  cmSystemTools::ExpandListArgument(ge.Parse(prop)
+                                    .Evaluate(this->Makefile,
+                                              config,
+                                              false,
+                                              this,
+                                              &dagChecker),
+                                    includes);
+
   std::set<std::string> uniqueIncludes;
   std::vector<std::string> orderedAndUniqueIncludes;
   for(std::vector<std::string>::const_iterator

Source/cmIncludeDirectoryCommand.cxx

@@ -55,6 +55,11 @@ bool cmIncludeDirectoryCommand
   return true;
 }
 
+static bool StartsWithGeneratorExpression(const std::string &input)
+{
+  return input[0] == '$' && input[1] == '<';
+}
+
 // do a lot of cleanup on the arguments because this is one place where folks
 // sometimes take the output of a program and pass it directly into this
 // command not thinking that a single argument could be filled with spaces
@@ -105,7 +110,7 @@ void cmIncludeDirectoryCommand::AddDirectory(const char *i,
     cmSystemTools::ConvertToUnixSlashes(ret);
     if(!cmSystemTools::FileIsFullPath(ret.c_str()))
       {
-      if(ret[0] != '$' && ret[1] != '<')
+      if(!StartsWithGeneratorExpression(ret))
         {
         std::string tmp = this->Makefile->GetStartDirectory();
         tmp += "/";

Tests/IncludeDirectories/TargetIncludeDirectories/CMakeLists.txt

@@ -12,13 +12,21 @@ create_header(bar)
 create_header(bat)
 create_header(foo)
 create_header(baz)
+create_header(bang)
+create_header(bing)
+create_header(bung)
 
 set(CMAKE_INCLUDE_CURRENT_DIR ON)
 
 include_directories("${CMAKE_CURRENT_BINARY_DIR}/bar")
+include_directories("$<1:${CMAKE_CURRENT_BINARY_DIR}/bang>")
 
 add_executable(TargetIncludeDirectories main.cpp)
 set_property(TARGET TargetIncludeDirectories APPEND PROPERTY INCLUDE_DIRECTORIES "${CMAKE_CURRENT_BINARY_DIR}/bat")
 set_property(TARGET TargetIncludeDirectories APPEND PROPERTY INCLUDE_DIRECTORIES "${CMAKE_CURRENT_BINARY_DIR}/foo")
+set_property(TARGET TargetIncludeDirectories APPEND PROPERTY
+    INCLUDE_DIRECTORIES "$<1:${CMAKE_CURRENT_BINARY_DIR}/bing>")
 
 include_directories("${CMAKE_CURRENT_BINARY_DIR}/baz")
+include_directories("$<1:${CMAKE_CURRENT_BINARY_DIR}/bung>")
+include_directories("sing$<1:/ting>")

Tests/IncludeDirectories/TargetIncludeDirectories/main.cpp

@@ -3,6 +3,10 @@
 #include "bat.h"
 #include "foo.h"
 #include "baz.h"
+#include "bang.h"
+#include "bing.h"
+#include "bung.h"
+#include "ting.h"
 
 int main(int, char**)
 {

Tests/IncludeDirectories/TargetIncludeDirectories/sing/ting/ting.h

@@ -0,0 +1 @@
+//ting.h

Tests/RunCMake/CMakeLists.txt

@@ -46,6 +46,7 @@ macro(add_RunCMake_test test)
 endmacro()
 
 add_RunCMake_test(GeneratorExpression)
+add_RunCMake_test(TargetPropertyGeneratorExpressions)
 add_RunCMake_test(Languages)
 add_RunCMake_test(ObjectLibrary)
 

Tests/RunCMake/TargetPropertyGeneratorExpressions/BadSelfReference1-result.txt

@@ -0,0 +1 @@
+1

Tests/RunCMake/TargetPropertyGeneratorExpressions/BadSelfReference1-stderr.txt

@@ -0,0 +1,6 @@
+CMake Error:
+  Error evaluating generator expression:
+
+    \$<TARGET_PROPERTY:INCLUDE_DIRECTORIES>
+
+  Self reference on target "TargetPropertyGeneratorExpressions".$

Tests/RunCMake/TargetPropertyGeneratorExpressions/BadSelfReference1.cmake

@@ -0,0 +1,7 @@
+
+file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/main.cpp"
+           "int main(int, char **) { return 0; }\n")
+
+add_executable(TargetPropertyGeneratorExpressions
+           "${CMAKE_CURRENT_BINARY_DIR}/main.cpp")
+include_directories("$<TARGET_PROPERTY:INCLUDE_DIRECTORIES>")

Tests/RunCMake/TargetPropertyGeneratorExpressions/BadSelfReference2-result.txt

@@ -0,0 +1 @@
+1

Tests/RunCMake/TargetPropertyGeneratorExpressions/BadSelfReference2-stderr.txt

@@ -0,0 +1,6 @@
+CMake Error:
+  Error evaluating generator expression:
+
+    \$<TARGET_PROPERTY:INCLUDE_DIRECTORIES>
+
+  Self reference on target "TargetPropertyGeneratorExpressions".$

Tests/RunCMake/TargetPropertyGeneratorExpressions/BadSelfReference2.cmake

@@ -0,0 +1,9 @@
+
+file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/main.cpp"
+           "int main(int, char **) { return 0; }\n")
+
+add_executable(TargetPropertyGeneratorExpressions
+           "${CMAKE_CURRENT_BINARY_DIR}/main.cpp")
+set_property(TARGET TargetPropertyGeneratorExpressions PROPERTY
+  INCLUDE_DIRECTORIES "$<TARGET_PROPERTY:INCLUDE_DIRECTORIES>"
+)

Tests/RunCMake/TargetPropertyGeneratorExpressions/BadSelfReference3-result.txt

@@ -0,0 +1 @@
+1

Tests/RunCMake/TargetPropertyGeneratorExpressions/BadSelfReference3-stderr.txt

@@ -0,0 +1,6 @@
+CMake Error:
+  Error evaluating generator expression:
+
+    \$<TARGET_PROPERTY:TargetPropertyGeneratorExpressions,INCLUDE_DIRECTORIES>
+
+  Self reference on target "TargetPropertyGeneratorExpressions".$

Tests/RunCMake/TargetPropertyGeneratorExpressions/BadSelfReference3.cmake

@@ -0,0 +1,8 @@
+
+file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/main.cpp"
+           "int main(int, char **) { return 0; }\n")
+
+add_executable(TargetPropertyGeneratorExpressions
+           "${CMAKE_CURRENT_BINARY_DIR}/main.cpp")
+include_directories(
+  "$<TARGET_PROPERTY:TargetPropertyGeneratorExpressions,INCLUDE_DIRECTORIES>")

Tests/RunCMake/TargetPropertyGeneratorExpressions/BadSelfReference4-result.txt

@@ -0,0 +1 @@
+1

Tests/RunCMake/TargetPropertyGeneratorExpressions/BadSelfReference4-stderr.txt

@@ -0,0 +1,6 @@
+CMake Error:
+  Error evaluating generator expression:
+
+    \$<TARGET_PROPERTY:TargetPropertyGeneratorExpressions,INCLUDE_DIRECTORIES>
+
+  Self reference on target "TargetPropertyGeneratorExpressions".$

Tests/RunCMake/TargetPropertyGeneratorExpressions/BadSelfReference4.cmake

@@ -0,0 +1,10 @@
+
+file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/main.cpp"
+           "int main(int, char **) { return 0; }\n")
+
+add_executable(TargetPropertyGeneratorExpressions
+           "${CMAKE_CURRENT_BINARY_DIR}/main.cpp")
+set_property(TARGET TargetPropertyGeneratorExpressions PROPERTY
+INCLUDE_DIRECTORIES
+  "$<TARGET_PROPERTY:TargetPropertyGeneratorExpressions,INCLUDE_DIRECTORIES>"
+)

Tests/RunCMake/TargetPropertyGeneratorExpressions/CMakeLists.txt

@@ -0,0 +1,8 @@
+
+cmake_minimum_required(VERSION 2.8)
+project(${RunCMake_TEST} CXX)
+
+# MSVC creates extra targets which pollute the stderr unless we set this.
+set(CMAKE_SUPPRESS_REGENERATION TRUE)
+
+include(${RunCMake_TEST}.cmake)

Tests/RunCMake/TargetPropertyGeneratorExpressions/RunCMakeTest.cmake

@@ -0,0 +1,6 @@
+include(RunCMake)
+
+run_cmake(BadSelfReference1)
+run_cmake(BadSelfReference2)
+run_cmake(BadSelfReference3)
+run_cmake(BadSelfReference4)