ENH: build examples as standalone project

Examples/CMakeLists.txt

+##### check if standalone project ######
+if(NOT PROJECT_NAME)
+  if(WIN32)
+    cmake_minimum_required(VERSION 2.8.8 FATAL_ERROR)
+  else()
+    cmake_minimum_required(VERSION 2.8.6 FATAL_ERROR)
+  endif()
+  project(OTBExamples)
+endif()
+
+if(PROJECT_NAME STREQUAL "OTBExamples")
+  set(BUILD_TESTING ON)
+  include(CTest)
+  include(${CMAKE_CURRENT_SOURCE_DIR}/../CMake/OTBManageLargeInputPaths.cmake)
+endif()
+
+##### check if standalone project ######
+
 if(NOT OTB_BUILD_DEFAULT_MODULES)
   message(FATAL_ERROR "BUILD_EXAMPLES requires OTB_BUILD_DEFAULT_MODULES to be ON")
 endif()
@@ -12,11 +30,81 @@ endforeach()
 
 find_package(OTB REQUIRED)
 include(${OTB_USE_FILE})
-# TODO : build as standalone project
 
+message(STATUS "Found OTB: ${OTB_USE_FILE}")
 set(OTB_TEST_DRIVER otbTestDriver)
 
-if(BUILD_APPLICATIONS)
+########################## shamelessly copied from OTB/CMakeLists.txt ##########################
+#Generate cmake variables with a set of largeinput data used in tests
+set(BASELINE       ${OTB_DATA_ROOT}/Baseline/OTB/Images)
+set(BASELINE_FILES ${OTB_DATA_ROOT}/Baseline/OTB/Files)
+set(INPUTDATA      ${OTB_DATA_ROOT}/Input)
+set(TEMP           ${OTB_BINARY_DIR}/Testing/Temporary)
+set(EXAMPLEDATA    ${OTB_DATA_ROOT}/Examples)
+set(OTBAPP_BASELINE       ${OTB_DATA_ROOT}/Baseline/OTB-Applications/Images)
+set(OTBAPP_BASELINE_FILES ${OTB_DATA_ROOT}/Baseline/OTB-Applications/Files)
+
+set(NOTOL      0.0)
+set(EPSILON_1  0.1)
+set(EPSILON_2  0.01)
+set(EPSILON_3  0.001)
+set(EPSILON_4  0.0001)
+set(EPSILON_5  0.00001)
+set(EPSILON_6  0.000001)
+set(EPSILON_7  0.0000001)
+set(EPSILON_8  0.00000001)
+set(EPSILON_9  0.000000001)
+set(EPSILON_10 0.0000000001)
+set(EPSILON_11 0.00000000001)
+set(EPSILON_12 0.000000000001)
+set(EPSILON_13 0.0000000000001)
+set(EPSILON_14 0.00000000000001)
+set(EPSILON_15 0.000000000000001)
+
+#-----------------------------------------------------------------------------
+# OTB wrapper for add_test that automatically sets the test's LABELS property
+# to the value of its containing module.
+#
+function(otb_add_test)
+  set(largeinput_regex "LARGEINPUT{([^;{}\r\n]*)}")
+
+  set(_depends_on_largeinput OFF)
+  foreach(arg IN LISTS ARGN)
+     if("x${arg}" MATCHES "${largeinput_regex}")
+       string(REGEX REPLACE "${largeinput_regex}" "\\1" largeinput_relative_path "${arg}")
+       set(_fullpath "${OTB_DATA_LARGEINPUT_ROOT}/${largeinput_relative_path}")
+       list(APPEND _out_arg ${_fullpath})
+       set(_depends_on_largeinput ON)
+     else()
+       list(APPEND _out_arg ${arg})
+     endif()
+  endforeach()
+
+  if (_depends_on_largeinput AND NOT OTB_DATA_USE_LARGEINPUT)
+    return()
+  endif()
+
+  add_test(${_out_arg})
+
+  if("NAME" STREQUAL "${ARGV0}")
+    set(_iat_testname ${ARGV1})
+  else()
+    set(_iat_testname ${ARGV0})
+  endif()
+
+  if(otb-module)
+    set(_label ${otb-module})
+  else()
+    set(_label ${main_project_name})
+  endif()
+
+  set_property(TEST ${_iat_testname} PROPERTY LABELS ${_label})
+
+endfunction()
+
+########################## end copied from OTB/CMakeLists.txt ##########################
+
+if(OTBApplicationEngine_LOADED)
   add_subdirectory(Application)
 endif()
 add_subdirectory(BasicFilters)