Merge pull request #621 from dstoup/pdal-ignore-json

Pdal ignore json

Author: dstoup

CMake/External_PDAL.cmake

@@ -89,6 +89,11 @@ if(WIN32)
   )
 endif()
 
+set(JSON_ARGS
+  -DJSONCPP_INCLUDE_DIR:PATH=IGNORE
+  -DJSONCPP_LIBRARY:FILEPATH=IGNORE
+  )
+
 ExternalProject_Add(PDAL
   DEPENDS ${PDAL_DEPENDS}
   URL ${PDAL_file}
@@ -97,6 +102,7 @@ ExternalProject_Add(PDAL
   ${COMMON_CMAKE_EP_ARGS}
   PATCH_COMMAND ${PDAL_PATCH_COMMAND}
   CMAKE_ARGS
+    ${JSON_ARGS}
     ${COMMON_CMAKE_ARGS}
     -DBUILD_SHARED_LIBS:BOOL=ON
     ${PDAL_EXTRA_BUILD_FLAGS}

Doc/release-notes/master.txt

@@ -24,3 +24,4 @@ Fixes since v1.4.0
  * Patch the ZLib CMakeLists.txt to elimate the 'd' suffix on the library name on WIN32.
  * Disable the 'examples' build for Darknet. It was causing a build failure on WIN32.
  * When building Boost in Fletch, always ignore the systemsite-config. That is the config from an installed version and will conflict with our build.
+ * Force PDAL to ignore libjson. It can't use the Fletch package nor can it use similar system packages.