More changes towards CMake port. Some issues with VTK still on Mac. Other than that, the main library seems to be building. Still need to add modules and install!

CMakeLists.txt

     PREFIX ${CMAKE_CURRENT_BINARY_DIR}/external/yaml-cpp
     CMAKE_ARGS -DCMAKE_INSTALL_PREFIX:PATH=${CMAKE_INSTALL_PREFIX}
 )
+add_compile_options(-DHAVE_YAMLCPP) 
 
 # tinyxml2, this library is used for XML IO 
-ExternalProject_Add(TINYXML2
-	GIT_REPOSITORY "https://github.com/leethomason/tinyxml2.git"
-	GIT_TAG  "master"
-	UPDATE_COMMAND ""
-	PATCH_COMMAND ""
-    PREFIX ${CMAKE_CURRENT_BINARY_DIR}/external/tinyxml2
-    CMAKE_ARGS -DCMAKE_INSTALL_PREFIX:PATH=${CMAKE_INSTALL_PREFIX}
-)
-
-option(MATIO_SUPPORT  "MATIO library support for MATLAB .mat files" ON)
+option(TINYXML_SUPPORT  "MATIO library support for MATLAB .mat files" OFF)
+if ( TINYXML_SUPPORT )
+	ExternalProject_Add(TINYXML2
+		GIT_REPOSITORY "https://github.com/leethomason/tinyxml2.git"
+		GIT_TAG  "master"
+		UPDATE_COMMAND ""
+		PATCH_COMMAND ""
+    	PREFIX ${CMAKE_CURRENT_BINARY_DIR}/external/tinyxml2
+    	CMAKE_ARGS -DCMAKE_INSTALL_PREFIX:PATH=${CMAKE_INSTALL_PREFIX}
+	)
+	add_compile_options(-DTINYXMLSUPPORT) 
+endif()
 
+option(MATIO_SUPPORT  "MATIO library support for MATLAB .mat files" OFF)
 if ( MATIO_SUPPORT )
+	add_compile_options(-DHAVE_MATIO) 
 	# matio, this library is used for MATLAB file IO
 	ExternalProject_ADD(MATIO
 		GIT_REPOSITORY  "git://git.code.sf.net/p/matio/matio"
 #####################
 project(LEMMA_CXX)
 
-# We don't Build VTK, it is too much. 
-find_package(VTK 6 REQUIRED NO_MODULE)
-include(${VTK_USE_FILE})
+# We don't Build VTK, it is too much.
+option (VTK_SUPPORT "VTK library for visualisation and grids" OFF)
+if (VTK_SUPPORT) 
+	find_package(VTK 6 REQUIRED NO_MODULE)
+	include(${VTK_USE_FILE})
+	add_compile_options(-DLEMMAUSEVTK) 
+endif()
+
+add_compile_options(-std=c++11) 
 
 set(LEMMA_VERSION_MAJOR "0")
 set(LEMMA_VERSION_MINOR "0")
 add_subdirectory (LemmaCore) 
 
 # TODO add compiler specific instructions
-add_compile_options(-std=c++11) 
+
 
 include_directories(${CMAKE_INSTALL_PREFIX}/include)
 add_executable(Hello "${PROJECT_SOURCE_DIR}/src/test.cpp")

LemmaCore/CMakeLists.txt

 include_directories(${CMAKE_INSTALL_PREFIX}/include)
 
-add_compile_options(-std=c++11 -DHAVE_YAMLCPP) 
-
-#file(GLOB LemmaCore_SRC
-#    "${CMAKE_CURRENT_DIR}/src/*.cpp"
-#)
 add_subdirectory("src")
 
-# TODO fill all the files
 add_library( lemmacore ${SOURCE} )  
-#		"src/lemma.cpp" 
-#		"src/dipolesource.cpp" 
-#		"src/GroundedElectricDipole.cpp" 
-#		"src/UngroundedElectricDipole.cpp"
-#)
-
 
+# Linking
 add_dependencies(lemmacore YAML-CPP)
-add_dependencies(lemmacore TINYXML2)
+if (TINYXML_SUPPORT)
+	add_dependencies(lemmacore TINYXML2)
+endif()
 if (MATIO_SUPPORT)
 	add_dependencies(lemmacore MATIO)
 endif()
-target_link_libraries(lemmacore ${VTK_LIBRARIES})
+if (VTK_SUPPORT) 
+	target_link_libraries(lemmacore ${VTK_LIBRARIES})
+endif()
 target_link_libraries(lemmacore "yaml-cpp")