diff -rupN openjpeg-2.3.0/src/bin/jp2/CMakeLists.txt openjpeg-2.3.0-new/src/bin/jp2/CMakeLists.txt
--- openjpeg-2.3.0/src/bin/jp2/CMakeLists.txt	2017-10-05 00:23:14.000000000 +0200
+++ openjpeg-2.3.0-new/src/bin/jp2/CMakeLists.txt	2017-12-25 14:55:37.562470567 +0100
@@ -44,6 +44,8 @@ endif()
 # Loop over all executables:
 foreach(exe opj_decompress opj_compress opj_dump)
   add_executable(${exe} ${exe}.c ${common_SRCS})
+  STRING(REPLACE "opj_" "opj2_" exe2 ${exe})
+  set_target_properties(${exe} PROPERTIES OUTPUT_NAME ${exe2})
   if(${CMAKE_VERSION} VERSION_GREATER "2.8.11")
     target_compile_options(${exe} PRIVATE ${OPENJP2_COMPILE_OPTIONS})
   endif()