Update system wide include for metslib.

CMakeLists.txt

@@ -354,12 +354,7 @@ if(PKG_CONFIG_FOUND)
   pkg_check_modules(METSLIB metslib)
   if(METSLIB_FOUND)
     set(HAVE_METSLIB ON)
-    include_directories(SYSTEM ${METSLIB_INCLUDE_DIRS})
-  else()
-    include_directories(SYSTEM "${PCL_SOURCE_DIR}/recognition/include/pcl/recognition/3rdparty/")
   endif()
-else()
-    include_directories(SYSTEM ${PCL_SOURCE_DIR}/recognition/include/pcl/recognition/3rdparty/)
 endif()
 
 # LibPNG

recognition/CMakeLists.txt

@@ -161,6 +161,13 @@ set(LIB_NAME "pcl_${SUBSYS_NAME}")
 include_directories("${CMAKE_CURRENT_SOURCE_DIR}/include")
 PCL_ADD_LIBRARY(${LIB_NAME} COMPONENT ${SUBSYS_NAME} SOURCES ${srcs} ${incs} ${impl_incs} ${face_detection_incs} ${ransac_based_incs} ${ransac_based_impl_incs} ${hv_incs} ${hv_impl_incs} ${cg_incs} ${cg_impl_incs} ${metslib_incs})
 target_link_libraries("${LIB_NAME}" pcl_common pcl_kdtree pcl_octree pcl_search pcl_features pcl_registration pcl_sample_consensus pcl_filters pcl_ml pcl_io)
+
+if(HAVE_METSLIB)
+  target_include_directories(${LIB_NAME} SYSTEM PUBLIC ${METSLIB_INCLUDE_DIRS})
+else()
+  target_include_directories(${LIB_NAME} SYSTEM PUBLIC ${PCL_SOURCE_DIR}/recognition/include/pcl/recognition/3rdparty/)
+endif()
+
 PCL_MAKE_PKGCONFIG(${LIB_NAME} COMPONENT ${SUBSYS_NAME} DESC ${SUBSYS_DESC} PCL_DEPS ${SUBSYS_DEPS})
 # Install include files
 PCL_ADD_INCLUDES("${SUBSYS_NAME}" "${SUBSYS_NAME}" ${incs})

recognition/include/pcl/recognition/hv/hv_go.h

@@ -19,9 +19,10 @@
 
 #include <pcl/pcl_macros.h>
 #include <pcl/recognition/hv/hypotheses_verification.h>
-#include <pcl/recognition/3rdparty/metslib/mets.hh>
 #include <pcl/features/normal_3d.h>
 
+#include <metslib/mets.hh> // Either include 3.party in pcl/recognition/3rdparty or system installed metslib
+
 #include <memory>
 
 namespace pcl