Compiler flags cascading to other projects [closed]

edit

I'm having issues with the ros-groovy-visp package as it requires the Cmakelist file to include a separate cmake file: /opt/ros/groovy/share/visp/VISPUse.cmake. The problem arises since this file adds compiler flags which are then affecting compilation for other projects

# Add extra build flags to be able to consider especially for OpenMP
list(APPEND CMAKE_CXX_FLAGS "-fopenmp")
list(APPEND CMAKE_CXX_FLAGS "-std=c++0x")

## Remove duplicates compilation flags separate_arguments(CMAKE_CXX_FLAGS)
list(REMOVE_DUPLICATES CMAKE_CXX_FLAGS)
string(REPLACE ";" " " CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}" CACHE STRING "common C++ build flags" FORCE)

How can I go about and remove the compiler flags added by this makefile? Are there better ways of handling this?