Fix bug in new cmake file, cgal overwriting cmake flags

Former-commit-id: fb45c43f7208d688088faceb9f5e1867d7bf1f47

shared/cmake/CMakeLists.txt

@@ -164,6 +164,7 @@ if(LIBIGL_WITH_CGAL) # to be cleaned
   # set(Boost_USE_STATIC_LIBS      ON)
   #
   # find_package(BOOST REQUIRED)
+  set(CGAL_DONT_OVERRIDE_CMAKE_FLAGS TRUE CACHE BOOL "CGAL's CMAKE Setup is super annoying ")
   include(${CGAL_USE_FILE})
   list(APPEND LIBIGL_INCLUDE_DIRS ${CGAL_3RD_PARTY_INCLUDE_DIRS})
   list(APPEND LIBIGL_INCLUDE_DIRS ${CGAL_INCLUDE_DIRS})