diff --git a/3rd_party/easy3d/viewer/CMakeLists.txt b/3rd_party/easy3d/viewer/CMakeLists.txt
index e58de2e..dd8c53f 100644
--- a/3rd_party/easy3d/viewer/CMakeLists.txt
+++ b/3rd_party/easy3d/viewer/CMakeLists.txt
@@ -80,12 +80,7 @@ target_include_directories(${PROJECT_NAME} PRIVATE ${ADTREE_easy3d_INCLUDE_DIR})
 target_include_directories(${PROJECT_NAME} PRIVATE ${ADTREE_glew_INCLUDE_DIR})
 target_include_directories(${PROJECT_NAME} PRIVATE ${ADTREE_glfw_INCLUDE_DIR})
 
-set (OpenGL_GL_PREFERENCE GLVND)
-find_package(OpenGL REQUIRED)
-message(STATUS "OpenGL libraries: ${OPENGL_LIBRARIES}")
-target_compile_definitions(${PROJECT_NAME} PRIVATE GLEW_STATIC)
-target_link_libraries(${PROJECT_NAME} ${OPENGL_LIBRARIES} 3rd_glew 3rd_glfw easy3d_core easy3d_util easy3d_fileio 3rd_tinyfiledialogs)
-
+target_link_libraries(${PROJECT_NAME} PUBLIC 3rd_glew 3rd_glfw easy3d_core easy3d_util easy3d_fileio 3rd_tinyfiledialogs)
 
 if (MSVC)
     target_compile_definitions(${PROJECT_NAME} PRIVATE _CRT_SECURE_NO_DEPRECATE)
diff --git a/3rd_party/glew/CMakeLists.txt b/3rd_party/glew/CMakeLists.txt
index 9bf9b44..63da7de 100755
--- a/3rd_party/glew/CMakeLists.txt
+++ b/3rd_party/glew/CMakeLists.txt
@@ -29,13 +29,14 @@ file(STRINGS ${GLEW_DIR}/config/version _VERSION_PATCH_STRING REGEX "GLEW_MICRO[
 string(REGEX REPLACE "GLEW_MICRO[ ]*=[ ]*([0-9]+)" "\\1" CPACK_PACKAGE_VERSION_PATCH ${_VERSION_PATCH_STRING})
 set(GLEW_VERSION ${CPACK_PACKAGE_VERSION_MAJOR}.${CPACK_PACKAGE_VERSION_MINOR}.${CPACK_PACKAGE_VERSION_PATCH})
 
-if (NOT GLEW_CUSTOM_OUTPUT_DIRS)
-    set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib)
-    set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib)
-    set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/bin)
-endif ()
-
-find_package(OpenGL REQUIRED)
+if(WIN32 OR MSVC OR APPLE)
+    find_package(OpenGL COMPONENTS OpenGL REQUIRED)
+    set(GLEW_LIBRARIES ${OPENGL_gl_LIBRARY})
+else() # == if(UNIX AND NOT APPLE)
+    set(OpenGL_GL_PREFERENCE GLVND)
+    find_package(OpenGL COMPONENTS OpenGL GLX REQUIRED)
+    set(GLEW_LIBRARIES ${OPENGL_opengl_LIBRARY} ${OPENGL_glx_LIBRARY})
+endif()
 
 # cmake<3.10 doesn't detect EGL/GLX
 if (CMAKE_VERSION VERSION_LESS 3.10)
@@ -45,13 +46,6 @@ if (CMAKE_VERSION VERSION_LESS 3.10)
     endif ()
 endif ()
 
-# prefer GLVND
-if (OPENGL_opengl_LIBRARY)
-    set(GLEW_LIBRARIES ${OPENGL_opengl_LIBRARY})
-else ()
-    set(GLEW_LIBRARIES ${OPENGL_gl_LIBRARY})
-endif ()
-
 # X11 required except for Windows and Apple OSX platforms
 if (GLEW_X11 AND NOT WIN32 AND NOT APPLE)
     find_package(X11)
@@ -76,4 +70,4 @@ endif ()
 
 target_compile_definitions(${PROJECT_NAME} PUBLIC GLEW_NO_GLU)
 target_include_directories(${PROJECT_NAME} PRIVATE ${GLEW_DIR}/include ${X11_INCLUDE_DIR})
-target_link_libraries(${PROJECT_NAME} LINK_PUBLIC ${GLEW_LIBRARIES})
\ No newline at end of file
+target_link_libraries(${PROJECT_NAME} LINK_PUBLIC ${GLEW_LIBRARIES})
diff --git a/AdTree/CMakeLists.txt b/AdTree/CMakeLists.txt
index bc0cd64..4d3dfa6 100755
--- a/AdTree/CMakeLists.txt
+++ b/AdTree/CMakeLists.txt
@@ -80,12 +80,7 @@ target_include_directories(${PROJECT_NAME} PRIVATE ${ADTREE_kd_tree_INCLUDE_DIR}
 target_include_directories(${PROJECT_NAME} PRIVATE ${ADTREE_lm_INCLUDE_DIR})
 
 target_compile_definitions(${PROJECT_NAME} PRIVATE GLEW_STATIC)
-
-#set (OpenGL_GL_PREFERENCE GLVND)
-find_package(OpenGL REQUIRED)
-message(STATUS "OpenGL libraries: ${OPENGL_LIBRARIES}")
-target_link_libraries(${PROJECT_NAME} ${OPENGL_LIBRARIES} 3rd_imgui easy3d_algo easy3d_viewer 3rd_tetgen 3rd_kd_tree 3rd_cminpack 3rd_optimizer_lm)
-
+target_link_libraries(${PROJECT_NAME} PRIVATE 3rd_imgui easy3d_algo easy3d_viewer 3rd_tetgen 3rd_kd_tree 3rd_cminpack 3rd_optimizer_lm)
 
 find_package(Boost REQUIRED) # It's "Boost", not "BOOST" or "boost". Case matters.
 target_link_libraries(${PROJECT_NAME} ${Boost_LIBRARIES})