Revert back to including apriltags via pkg-config

Author: wxmerkt

apriltag_ros/CMakeLists.txt

@@ -18,8 +18,11 @@ find_package(catkin REQUIRED COMPONENTS
 
 find_package(Eigen3 REQUIRED)
 find_package(OpenCV REQUIRED)
-find_package(apriltag REQUIRED)
-find_package(Threads REQUIRED)
+
+find_package(PkgConfig)
+pkg_search_module(apriltag REQUIRED apriltag)
+set(apriltag_INCLUDE_DIRS "${apriltag_INCLUDE_DIRS}/apriltag")
+link_directories(${apriltag_LIBDIR})
 
 # Set the build type.  Options are:
 #  Coverage       : w/ debug symbols, w/o optimization, w/ code-coverage

apriltag_ros/include/apriltag_ros/common_functions.h

@@ -62,7 +62,7 @@
 #include <sensor_msgs/image_encodings.h>
 #include <tf/transform_broadcaster.h>
 
-#include "apriltag.h"
+#include <apriltag.h>
 
 #include "apriltag_ros/AprilTagDetection.h"
 #include "apriltag_ros/AprilTagDetectionArray.h"