TEST: verify that otbopenjpeg only exports mangled symbols

Testing/Utilities/CMakeLists.txt

@@ -525,9 +525,20 @@ classifyKNN2.cxx
 )
 
 
-#IF(OTB_COMPILE_JPEG2000)
+IF(OTB_COMPILE_JPEG2000)
 #  SET(UtilitiesTests_SRCS ${UtilitiesTests_SRCS}  openJpegEncoder.cxx openJpegDecoder.cxx)
-#ENDIF(OTB_COMPILE_JPEG2000)
+
+  IF (UNIX AND OPJ_MANGLE_PREFIX)
+  # Rely on "nm" for this test, so enable it only on Unix platform  
+  ADD_TEST(NAME utTvOpenJpegMangling
+           COMMAND ${CMAKE_COMMAND}
+                   -DOPJ_TARGET_PATH=$<TARGET_FILE:otbopenjpeg>
+                   -DOPJ_MANGLE_PREFIX=${OPJ_MANGLE_PREFIX}
+                   -P ${CMAKE_CURRENT_SOURCE_DIR}/TestOpenJPEGMangling.cmake)
+  
+  ENDIF()
+
+ENDIF(OTB_COMPILE_JPEG2000)
 
 IF(NOT OTB_USE_EXTERNAL_OPENTHREADS)
   SET(UtilitiesTests_SRCS ${UtilitiesTests_SRCS}

Testing/Utilities/TestOpenJPEGMangling.cmake

+find_program(NM nm REQUIRED)
+
+execute_process(COMMAND ${NM} ${OPJ_TARGET_PATH}
+                OUTPUT_VARIABLE NM_OUTPUT)
+
+# get a list, one item for each line
+string(REPLACE "\n" ";" NM_OUTPUT ${NM_OUTPUT})
+
+set(mangling_ok true)
+
+# define the regex to match the nm output
+set(regex "[a-z0-9]+ T ([a-zA-Z0-9_]+)")
+
+foreach( NM_SYMBOL ${NM_OUTPUT})
+  if (NM_SYMBOL MATCHES ${regex})
+    # extract the symbol part
+    string (REGEX REPLACE "${regex}" "\\1" symbol "${NM_SYMBOL}" )
+    # check that the symbol begins with "${OPJ_MANGLE_PREFIX}_"
+    if (NOT ${symbol} MATCHES "^${OPJ_MANGLE_PREFIX}_")
+      # two additional symbols _fini and _init are added for the shared libraries
+      if (NOT ${symbol} MATCHES "(_fini|_init)")
+        message("Found unmangled symbol : ${symbol}")
+        # test fails as soon as there is one unmangled symbol
+        set(mangling_ok false)
+      endif()
+    endif()
+  endif()
+endforeach()
+
+if (NOT mangling_ok)
+  # outputing a fatal error will make the test fail
+  message(FATAL_ERROR "Not all symbols are properly mangled")
+endif()
\ No newline at end of file