我安装了所有必需的CGAL库，并在linux上编译我的程序时将所有库路径添加到我的makefile中，但它仍然存在编译错误。
这是我的makefile的内容
//--------------------------------------------------
FLAGS = -Wall -g -std=c++11 -O3
BOOST_LIB_PATH = -I /usr/include/include/
CGAL_LIB_PATH = -I /usr/local/include/
all :
g++ $(FLAGS) $(BOOST) $(CGAL) main.cpp -o main
clean :
rm main
//--------------------------------------------------
Bellow是编译时的错误信息，请帮忙！
//----------------------------------------------------
g++ -Wall -g -std=c++11 -O3 -I /usr/include/include/ -I /usr/local/include/ main.cpp -o main
/usr/local/include/CGAL/Interval_nt.h:208: undefined reference to `CGAL::assertion_fail(char const*, char const*, int, char const*)'
/usr/local/include/CGAL/Interval_nt.h:210: undefined reference to `CGAL::assertion_fail(char const*, char const*, int, char const*)'
/tmp/cc5WX5dM.o: In function `~Gmpz_rep':
/usr/local/include/CGAL/GMP/Gmpz_type.h:57: undefined reference to `__gmpz_clear'
/usr/local/include/CGAL/GMP/Gmpz_type.h:57: undefined reference to `__gmpz_clear'
/usr/local/include/CGAL/GMP/Gmpz_type.h:57: undefined reference to `__gmpz_clear'
/tmp/cc5WX5dM.o: In function `CGAL::Gmpz::operator==(CGAL::Gmpz const&) const':
/usr/local/include/CGAL/GMP/Gmpz_type.h:154: undefined reference to `__gmpz_cmp'
/usr/local/include/CGAL/GMP/Gmpz_type.h:154: undefined reference to `__gmpz_cmp'
/tmp/cc5WX5dM.o: In function `CGAL::Quadratic_program_solution<CGAL::Gmpz>::optimality_certificate_numerators_begin() const':
/usr/local/include/CGAL/QP_solution.h:460: undefined reference to `CGAL::assertion_fail(char const*, char const*, int, char const*)'
/tmp/cc5WX5dM.o: In function `CGAL::Gmpz::operator<(CGAL::Gmpz const&) const':
/usr/local/include/CGAL/GMP/Gmpz_type.h:152: undefined reference to `__gmpz_cmp'
/usr/local/include/CGAL/GMP/Gmpz_type.h:152: undefined reference to `__gmpz_cmp'
/usr/local/include/CGAL/GMP/Gmpz_type.h:152: undefined reference to `__gmpz_cmp'
/tmCGAL::assertion_fail(char const*, char const*, int, char const*)'
collect2: error: ld returned 1 exit status
make: *** [all] Error 1