ENH: superbuild: add empty target when using system libs

Superbuild/CMake/External_boost.cmake

@@ -17,12 +17,12 @@ if(USE_SYSTEM_BOOST)
     1.35.0
     REQUIRED
     )
-  
   # Optional components
   find_package ( Boost
     1.35.0
     COMPONENTS unit_test_framework
     )
+  add_custom_target(${proj})
   message(STATUS "  Using Boost system version")
 else()
   SETUP_SUPERBUILD(PROJECT ${proj})

Superbuild/CMake/External_curl.cmake

@@ -7,18 +7,18 @@ message(STATUS "Setup cURL ...")
 
 if(USE_SYSTEM_CURL)
   find_package ( CURL REQUIRED )
+  add_custom_target(${proj})
   message(STATUS "  Using cURL system version")
 else()
   SETUP_SUPERBUILD(PROJECT ${proj})
-    
-  if(USE_SYSTEM_ZLIB)
-    set(CURL_SB_ZLIB_CONFIG)
-  else()
-    set(CURL_SB_ZLIB_CONFIG 
-      -DZLIB_ROOT:STRING=${SB_INSTALL_PREFIX}
-      )
-    list(APPEND ${proj}_DEPENDENCIES ZLIB)
-  endif()
+  
+  # declare dependencies
+  set(${proj}_DEPENDENCIES ZLIB)
+  INCLUDE_SUPERBUILD_DEPENDENCIES(${${proj}_DEPENDENCIES})
+  # set proj back to its original value
+  set(proj CURL)
+  
+  ADD_SUPERBUILD_CONFIG_VAR(ZLIB_ROOT)
   
   #TODO: add openssl and other dependencies
   if(MSVC)

Superbuild/CMake/External_expat.cmake

@@ -7,6 +7,7 @@ message(STATUS "Setup expat ...")
 
 if(USE_SYSTEM_EXPAT)
   find_package ( EXPAT REQUIRED )
+  add_custom_target(${proj})
   message(STATUS "  Using expat system version")
 else()
   SETUP_SUPERBUILD(PROJECT ${proj})

Superbuild/CMake/External_fftw.cmake

@@ -7,7 +7,8 @@ message(STATUS "Setup FFTW ...")
 
 if(USE_SYSTEM_FFTW)
   # TODO : use ITK's FindFFTW
-  find_package ( FFTW REQUIRED )
+  #find_package ( FFTW REQUIRED )
+  add_custom_target(${proj})
   message(STATUS "  Using FFTW system version")
 else()
   SETUP_SUPERBUILD(PROJECT ${proj})

Superbuild/CMake/External_gdal.cmake

@@ -7,6 +7,7 @@ message(STATUS "Setup GDAL...")
 
 if(USE_SYSTEM_GDAL)
   find_package ( GDAL REQUIRED )
+  add_custom_target(${proj})
   message(STATUS "  Using GDAL system version")
 else()
   SETUP_SUPERBUILD(PROJECT ${proj})

Superbuild/CMake/External_geos.cmake

@@ -8,6 +8,7 @@ message(STATUS "Setup GEOS ...")
 if(USE_SYSTEM_GEOS)
   # TODO : FindGEOS.cmake
   #find_package ( GEOS REQUIRED )
+  add_custom_target(${proj})
   message(STATUS "  Using GEOS system version")
 else()
   SETUP_SUPERBUILD(PROJECT ${proj})

Superbuild/CMake/External_geotiff.cmake

@@ -7,6 +7,7 @@ message(STATUS "Setup libgeotiff...")
 
 if(USE_SYSTEM_GEOTIFF)
   find_package ( GeoTIFF REQUIRED )
+  add_custom_target(${proj})
   message(STATUS "  Using libgeotiff system version")
 else()
   SETUP_SUPERBUILD(PROJECT ${proj})

Superbuild/CMake/External_itk.cmake

@@ -7,6 +7,7 @@ message(STATUS "Setup ITK...")
 
 if(USE_SYSTEM_ITK)
   find_package ( ITK REQUIRED )
+  add_custom_target(${proj})
   message(STATUS "  Using ITK system version")
 else()
   SETUP_SUPERBUILD(PROJECT ${proj})

Superbuild/CMake/External_jpeg.cmake

@@ -7,6 +7,7 @@ message(STATUS "Setup libjpeg...")
 
 if(USE_SYSTEM_JPEG)
   find_package ( JPEG REQUIRED )
+  add_custom_target(${proj})
   message(STATUS "  Using libjpeg system version")
 else()
   SETUP_SUPERBUILD(PROJECT ${proj})

Superbuild/CMake/External_libkml.cmake

@@ -7,6 +7,7 @@ message(STATUS "Setup libKML ...")
 
 if(USE_SYSTEM_LIBKML)
   find_package ( LibKML REQUIRED )
+  add_custom_target(${proj})
   message(STATUS "  Using libKML system version")
 else()
   SETUP_SUPERBUILD(PROJECT ${proj})

Superbuild/CMake/External_muparser.cmake

@@ -7,6 +7,7 @@ message(STATUS "Setup muParser ...")
 
 if(USE_SYSTEM_MUPARSER)
   find_package ( MUPARSER REQUIRED )
+  add_custom_target(${proj})
   message(STATUS "  Using muParser system version")
 else()
   SETUP_SUPERBUILD(PROJECT ${proj})

Superbuild/CMake/External_muparserx.cmake

@@ -7,6 +7,7 @@ message(STATUS "Setup muParserX ...")
 
 if(USE_SYSTEM_MUPARSERX)
   find_package ( MUPARSERX REQUIRED )
+  add_custom_target(${proj})
   message(STATUS "  Using muParserX system version")
 else()
   SETUP_SUPERBUILD(PROJECT ${proj})

Superbuild/CMake/External_opencv.cmake

@@ -7,6 +7,7 @@ message(STATUS "Setup OpenCV...")
 
 if(USE_SYSTEM_OPENCV)
   find_package ( OpenCV REQUIRED )
+  add_custom_target(${proj})
   message(STATUS "  Using OpenCV system version")
 else()
   SETUP_SUPERBUILD(PROJECT ${proj})

Superbuild/CMake/External_openjpeg.cmake

@@ -8,6 +8,7 @@ message(STATUS "Setup OpenJpeg...")
 if(USE_SYSTEM_OPENJPEG)
   # TODO : FindOpenJPEG.cmake
   # find_package ( OpenJPEG REQUIRED )
+  add_custom_target(${proj})
   message(STATUS "  Using OpenJpeg system version")
 else()
   SETUP_SUPERBUILD(PROJECT ${proj})

Superbuild/CMake/External_openthreads.cmake

@@ -11,6 +11,7 @@ endif()
 
 if(USE_SYSTEM_OPENTHREADS)
   find_package ( OpenThreads REQUIRED )
+  add_custom_target(${proj})
   message(STATUS "  Using OpenThread system version")
 else()
   SETUP_SUPERBUILD(PROJECT ${proj})

Superbuild/CMake/External_ossim.cmake

@@ -15,6 +15,7 @@ ADD_SYSTEM_LOCATION(PROJECT ${proj} VARIABLES ${proj}_LIBRARY ${proj}_INCLUDE_DI
 
 if(USE_SYSTEM_OSSIM)
   find_package ( Ossim REQUIRED )
+  add_custom_target(${proj})
   message(STATUS "  Using OSSIM system version")
 else()
   SETUP_SUPERBUILD(PROJECT ${proj})

Superbuild/CMake/External_pcre.cmake

@@ -8,6 +8,7 @@ message(STATUS "Setup pcre...")
 if(USE_SYSTEM_PCRE)
   # TODO : FindPCRE.cmake
   # find_package ( PCRE REQUIRED )
+  add_custom_target(${proj})
   message(STATUS "  Using pcre system version")
 else()
   SETUP_SUPERBUILD(PROJECT ${proj})

Superbuild/CMake/External_png.cmake

@@ -7,6 +7,7 @@ message(STATUS "Setup libpng...")
 
 if(USE_SYSTEM_PNG)
   find_package ( PNG REQUIRED )
+  add_custom_target(${proj})
   message(STATUS "  Using libpng system version")
 else()
   SETUP_SUPERBUILD(PROJECT ${proj})

Superbuild/CMake/External_proj.cmake

@@ -8,6 +8,7 @@ message(STATUS "Setup Proj.4 ...")
 if(USE_SYSTEM_PROJ)
   # TODO : FindPROJ.cmake
   #find_package ( PROJ REQUIRED )
+  add_custom_target(${proj})
   message(STATUS "  Using Proj4 system version")
 else()
   SETUP_SUPERBUILD(PROJECT ${proj})

Superbuild/CMake/External_qt4.cmake

@@ -7,6 +7,7 @@ message(STATUS "Setup Qt4 ...")
 
 if(USE_SYSTEM_QT4)
   find_package ( QT4 REQUIRED )
+  add_custom_target(${proj})
   message(STATUS "  Using Qt4 system version")
 else()
   SETUP_SUPERBUILD(PROJECT ${proj})