force to use own glew even if the system has installed one(brew)

CMakeLists.txt

@@ -509,6 +509,8 @@ find_package(PNG REQUIRED)
 set(OpenGL_GL_PREFERENCE "LEGACY")
 find_package(OpenGL REQUIRED)
 
+set(GLEW_ROOT "${CMAKE_PREFIX_PATH}")
+message("GLEW_ROOT: ${GLEW_ROOT}")
 # Find glew or use bundled version
 if (SLIC3R_STATIC AND NOT SLIC3R_STATIC_EXCLUDE_GLEW)
     set(GLEW_USE_STATIC_LIBS ON)

cmake/modules/FindGLEW.cmake

@@ -64,16 +64,6 @@ This module defines the following variables:
 
 include(FindPackageHandleStandardArgs)
 
-find_package(GLEW CONFIG QUIET)
-
-if(GLEW_FOUND)
-  find_package_handle_standard_args(GLEW DEFAULT_MSG GLEW_CONFIG)
-  return()
-endif()
-
-if(GLEW_VERBOSE)
-  message(STATUS "FindGLEW: did not find GLEW CMake config file. Searching for libraries.")
-endif()
 
 if(APPLE)
   find_package(OpenGL QUIET)