Please help with the following errors when make the example. Thanks -James

HElib-master/example_program$ make
Scanning dependencies of target helib_example
[ 50%] Building CXX object CMakeFiles/helib_example.dir/helib_example.cpp.o
[100%] Linking CXX executable helib_example
/usr/bin/ld: /usr/local/lib/libntl.a(lip.o): in function redc(_ntl_gbigint_body*, _ntl_gbigint_body*, long, unsigned long, _ntl_gbigint_body*)': /home/jamesdang/ntl-11.3.2/src/lip.cpp:5472: undefined reference to __gmpn_addmul_1'
/usr/bin/ld: /home/jamesdang/ntl-11.3.2/src/lip.cpp:5484: undefined reference to __gmpn_sub_n' /usr/bin/ld: /usr/local/lib/libntl.a(lip.o): in function _ntl_rem_struct_basic::eval(long*, _ntl_gbigint_body*, _ntl_tmp_vec*)':
/home/jamesdang/ntl-11.3.2/src/lip.cpp:7937: undefined reference to __gmpn_mod_1' /usr/bin/ld: /usr/local/lib/libntl.a(lip.o): in function _ntl_reduce_struct_montgomery::eval(_ntl_gbigint_body**, _ntl_gbigint_body**)':
/home/jamesdang/ntl-11.3.2/src/lip.cpp:5556: undefined reference to __gmpn_addmul_1' /usr/bin/ld: /home/jamesdang/ntl-11.3.2/src/lip.cpp:5568: undefined reference to __gmpn_sub_n'
/usr/bin/ld: /usr/local/lib/libntl.a(lip.o): in function _ntl_crt_struct_basic::eval(_ntl_gbigint_body**, long const*, _ntl_tmp_vec*)': /home/jamesdang/ntl-11.3.2/src/lip.cpp:6765: undefined reference to __gmpn_addmul_1'
/usr/bin/ld: /usr/local/lib/libntl.a(lip.o): in function _ntl_rem_struct_medium::eval(long*, _ntl_gbigint_body*, _ntl_tmp_vec*)': /home/jamesdang/ntl-11.3.2/src/lip.cpp:8021: undefined reference to __gmpn_mod_1'
/usr/bin/ld: /usr/local/lib/libntl.a(lip.o): in function _ntl_grshift(_ntl_gbigint_body*, long, _ntl_gbigint_body**)': /home/jamesdang/ntl-11.3.2/src/lip.cpp:2403: undefined reference to __gmpn_rshift'
/usr/bin/ld: /usr/local/lib/libntl.a(lip.o): in function _ntl_glshift(_ntl_gbigint_body*, long, _ntl_gbigint_body**)': /home/jamesdang/ntl-11.3.2/src/lip.cpp:2338: undefined reference to __gmpn_lshift'
/usr/bin/ld: /usr/local/lib/libntl.a(lip.o): in function __gmpn_sub': /usr/local/include/gmp.h:2190: undefined reference to __gmpn_sub_n'
/usr/bin/ld: /usr/local/lib/libntl.a(lip.o): in function __gmpn_add': /usr/local/include/gmp.h:2135: undefined reference to __gmpn_add_n'
/usr/bin/ld: /usr/local/lib/libntl.a(lip.o): in function __gmpn_sub': /usr/local/include/gmp.h:2190: undefined reference to __gmpn_sub_n'
/usr/bin/ld: /usr/local/include/gmp.h:2190: undefined reference to __gmpn_sub_n' /usr/bin/ld: /usr/local/lib/libntl.a(lip.o): in function __gmpn_add':
/usr/local/include/gmp.h:2135: undefined reference to __gmpn_add_n' /usr/bin/ld: /usr/local/lib/libntl.a(lip.o): in function __gmpn_sub':
/usr/local/include/gmp.h:2190: undefined reference to __gmpn_sub_n' /usr/bin/ld: /usr/local/include/gmp.h:2190: undefined reference to __gmpn_sub_n'
/usr/bin/ld: /usr/local/include/gmp.h:2190: undefined reference to __gmpn_sub_n' /usr/bin/ld: /usr/local/include/gmp.h:2190: undefined reference to __gmpn_sub_n'
/usr/bin/ld: /usr/local/lib/libntl.a(lip.o): in function _ntl_gsmul(_ntl_gbigint_body*, long, _ntl_gbigint_body**)': /home/jamesdang/ntl-11.3.2/src/lip.cpp:3218: undefined reference to __gmpn_mul_1'
/usr/bin/ld: /home/jamesdang/ntl-11.3.2/src/lip.cpp:3216: undefined reference to __gmpn_lshift' /usr/bin/ld: /usr/local/lib/libntl.a(lip.o): in function _ntl_gsdiv(_ntl_gbigint_body*, long, _ntl_gbigint_body**)':
/home/jamesdang/ntl-11.3.2/src/lip.cpp:3278: undefined reference to __gmpn_divrem_1' /usr/bin/ld: /home/jamesdang/ntl-11.3.2/src/lip.cpp:3276: undefined reference to __gmpn_rshift'
/usr/bin/ld: /usr/local/lib/libntl.a(lip.o): in function _ntl_gsmod(_ntl_gbigint_body*, long)': /home/jamesdang/ntl-11.3.2/src/lip.cpp:3342: undefined reference to __gmpn_mod_1'
/usr/bin/ld: /usr/local/lib/libntl.a(lip.o): in function _ntl_gsqrts(long)': /home/jamesdang/ntl-11.3.2/src/lip.cpp:3530: undefined reference to __gmpn_sqrtrem'
/usr/bin/ld: /usr/local/lib/libntl.a(lip.o): in function _ntl_quick_accum_muladd(_ntl_gbigint_body*, _ntl_gbigint_body*, long)': /home/jamesdang/ntl-11.3.2/src/lip.cpp:9053: undefined reference to __gmpn_addmul_1'
/usr/bin/ld: /usr/local/lib/libntl.a(lip.o): in function _ntl_leftrotate(_ntl_gbigint_body**, _ntl_gbigint_body* const*, long, _ntl_gbigint_body*, long, _ntl_gbigint_body**)': /home/jamesdang/ntl-11.3.2/src/lip.cpp:9181: undefined reference to __gmpn_lshift'
/usr/bin/ld: /home/jamesdang/ntl-11.3.2/src/lip.cpp:9168: undefined reference to __gmpn_lshift' /usr/bin/ld: /usr/local/lib/libntl.a(lip.o): in function __gmpn_neg':
/usr/local/include/gmp.h:2226: undefined reference to __gmpn_com' /usr/bin/ld: /usr/local/lib/libntl.a(lip.o): in function _ntl_ss_submod(_ntl_gbigint_body**, _ntl_gbigint_body* const*, _ntl_gbigint_body* const*, _ntl_gbigint_body*, long)':
/home/jamesdang/ntl-11.3.2/src/lip.cpp:9302: undefined reference to __gmpn_sub_n' /usr/bin/ld: /usr/local/lib/libntl.a(lip.o): in function __gmpn_sub':
/usr/local/include/gmp.h:2190: undefined reference to __gmpn_sub_n' /usr/bin/ld: /usr/local/lib/libntl.a(lip.o): in function _ntl_gaorsmul_1(_ntl_gbigint_body*, long, long, _ntl_gbigint_body**)':
/home/jamesdang/ntl-11.3.2/src/lip.cpp:8300: undefined reference to __gmpn_submul_1' /usr/bin/ld: /home/jamesdang/ntl-11.3.2/src/lip.cpp:8275: undefined reference to __gmpn_addmul_1'
/usr/bin/ld: /usr/local/lib/libntl.a(lip.o): in function _ntl_MPN_MUL_1C': /home/jamesdang/ntl-11.3.2/src/lip.cpp:8092: undefined reference to __gmpn_mul_1'
/usr/bin/ld: /usr/local/lib/libntl.a(lip.o): in function _ntl_gaorsmul_1(_ntl_gbigint_body*, long, long, _ntl_gbigint_body**)': /home/jamesdang/ntl-11.3.2/src/lip.cpp:8284: undefined reference to __gmpn_mul_1'
/usr/bin/ld: /usr/local/lib/libntl.a(lip.o): in function _ntl_gsqrt(_ntl_gbigint_body*, _ntl_gbigint_body**)': /home/jamesdang/ntl-11.3.2/src/lip.cpp:3618: undefined reference to __gmpn_sqrtrem'
/usr/bin/ld: /usr/local/lib/libntl.a(lip.o): in function gmod_simple(_ntl_gbigint_body*, _ntl_gbigint_body*, _ntl_gbigint_body**)': /home/jamesdang/ntl-11.3.2/src/lip.cpp:3496: undefined reference to __gmpn_tdiv_qr'
/usr/bin/ld: /usr/local/lib/libntl.a(lip.o): in function _ntl_rem_struct_fast::eval(long*, _ntl_gbigint_body*, _ntl_tmp_vec*)': /home/jamesdang/ntl-11.3.2/src/lip.cpp:7977: undefined reference to __gmpn_mod_1'
/usr/bin/ld: /usr/local/lib/libntl.a(lip.o): in function _ntl_ggcd(_ntl_gbigint_body*, _ntl_gbigint_body*, _ntl_gbigint_body**)': /home/jamesdang/ntl-11.3.2/src/lip.cpp:3762: undefined reference to __gmpn_gcd'
/usr/bin/ld: /home/jamesdang/ntl-11.3.2/src/lip.cpp:3764: undefined reference to __gmpn_gcd' /usr/bin/ld: /usr/local/lib/libntl.a(lip.o): in function _ntl_gdiv(_ntl_gbigint_body*, _ntl_gbigint_body*, _ntl_gbigint_body**, _ntl_gbigint_body**)':
/home/jamesdang/ntl-11.3.2/src/lip.cpp:3418: undefined reference to __gmpn_tdiv_qr' /usr/bin/ld: /usr/local/lib/libntl.a(lip.o): in function _ntl_ginv(_ntl_gbigint_body*, _ntl_gbigint_body*, _ntl_gbigint_body**)':
/home/jamesdang/ntl-11.3.2/src/lip.cpp:4303: undefined reference to __gmpn_gcdext' /usr/bin/ld: /usr/local/lib/libntl.a(lip.o): in function _ntl_gsq(_ntl_gbigint_body*, _ntl_gbigint_body**)':
/home/jamesdang/ntl-11.3.2/src/lip.cpp:3126: undefined reference to __gmpn_sqr' /usr/bin/ld: /home/jamesdang/ntl-11.3.2/src/lip.cpp:3157: undefined reference to __gmpn_sqr'
/usr/bin/ld: /usr/local/lib/libntl.a(lip.o): in function base_mul': /home/jamesdang/ntl-11.3.2/src/lip.cpp:2878: undefined reference to __gmpn_mul_1'
/usr/bin/ld: /home/jamesdang/ntl-11.3.2/src/lip.cpp:2883: undefined reference to __gmpn_addmul_1' /usr/bin/ld: /home/jamesdang/ntl-11.3.2/src/lip.cpp:2878: undefined reference to __gmpn_mul_1'
/usr/bin/ld: /home/jamesdang/ntl-11.3.2/src/lip.cpp:2883: undefined reference to __gmpn_addmul_1' /usr/bin/ld: /home/jamesdang/ntl-11.3.2/src/lip.cpp:2878: undefined reference to __gmpn_mul_1'
/usr/bin/ld: /home/jamesdang/ntl-11.3.2/src/lip.cpp:2883: undefined reference to __gmpn_addmul_1' /usr/bin/ld: /home/jamesdang/ntl-11.3.2/src/lip.cpp:2878: undefined reference to __gmpn_mul_1'
/usr/bin/ld: /home/jamesdang/ntl-11.3.2/src/lip.cpp:2883: undefined reference to __gmpn_addmul_1' /usr/bin/ld: /usr/local/lib/libntl.a(lip.o): in function _ntl_gmul(_ntl_gbigint_body*, _ntl_gbigint_body*, _ntl_gbigint_body**)':
/home/jamesdang/ntl-11.3.2/src/lip.cpp:3017: undefined reference to __gmpn_mul' /usr/bin/ld: /home/jamesdang/ntl-11.3.2/src/lip.cpp:2951: undefined reference to __gmpn_mul'
/usr/bin/ld: /home/jamesdang/ntl-11.3.2/src/lip.cpp:2993: undefined reference to __gmpn_sqr' /usr/bin/ld: /home/jamesdang/ntl-11.3.2/src/lip.cpp:2927: undefined reference to __gmpn_sqr'
/usr/bin/ld: /home/jamesdang/ntl-11.3.2/src/lip.cpp:3011: undefined reference to __gmpn_mul' /usr/bin/ld: /home/jamesdang/ntl-11.3.2/src/lip.cpp:2945: undefined reference to __gmpn_mul'
/usr/bin/ld: /usr/local/lib/libntl.a(lip.o): in function gadd_mul_many': /home/jamesdang/ntl-11.3.2/src/lip.cpp:7089: undefined reference to __gmpn_addmul_1'
/usr/bin/ld: /usr/local/lib/libntl.a(lip.o): in function _ntl_gexteucl(_ntl_gbigint_body*, _ntl_gbigint_body**, _ntl_gbigint_body*, _ntl_gbigint_body**, _ntl_gbigint_body**)': /home/jamesdang/ntl-11.3.2/src/lip.cpp:4182: undefined reference to __gmpn_gcdext'
/usr/bin/ld: /usr/local/lib/libntl.a(lip.o): in function _ntl_gpowermod(_ntl_gbigint_body*, _ntl_gbigint_body*, _ntl_gbigint_body*, _ntl_gbigint_body**)': /home/jamesdang/ntl-11.3.2/src/lip.cpp:5641: undefined reference to __gmpz_init'
/usr/bin/ld: /home/jamesdang/ntl-11.3.2/src/lip.cpp:5641: undefined reference to __gmpz_init' /usr/bin/ld: /home/jamesdang/ntl-11.3.2/src/lip.cpp:5641: undefined reference to __gmpz_init'
/usr/bin/ld: /home/jamesdang/ntl-11.3.2/src/lip.cpp:5641: undefined reference to __gmpz_init' /usr/bin/ld: /usr/local/lib/libntl.a(lip.o): in function _ntl_gmp_powermod':
/home/jamesdang/ntl-11.3.2/src/lip.cpp:5654: undefined reference to __gmpz_import' /usr/bin/ld: /home/jamesdang/ntl-11.3.2/src/lip.cpp:5655: undefined reference to __gmpz_import'
/usr/bin/ld: /home/jamesdang/ntl-11.3.2/src/lip.cpp:5656: undefined reference to __gmpz_import' /usr/bin/ld: /home/jamesdang/ntl-11.3.2/src/lip.cpp:5658: undefined reference to __gmpz_powm'
/usr/bin/ld: /usr/local/lib/libntl.a(lip.o): in function _ntl_gpowermod(_ntl_gbigint_body*, _ntl_gbigint_body*, _ntl_gbigint_body*, _ntl_gbigint_body**)': /home/jamesdang/ntl-11.3.2/src/lip.cpp:5642: undefined reference to __gmpz_clear'
/usr/bin/ld: /home/jamesdang/ntl-11.3.2/src/lip.cpp:5642: undefined reference to __gmpz_clear' /usr/bin/ld: /home/jamesdang/ntl-11.3.2/src/lip.cpp:5642: undefined reference to __gmpz_clear'
/usr/bin/ld: /home/jamesdang/ntl-11.3.2/src/lip.cpp:5642: undefined reference to __gmpz_clear' /usr/bin/ld: /usr/local/lib/libntl.a(lip.o): in function _ntl_gmp_powermod':
/home/jamesdang/ntl-11.3.2/src/lip.cpp:5671: undefined reference to __gmpz_export' /usr/bin/ld: /usr/local/lib/libntl.a(lip.o): in function _ntl_gpowermod(_ntl_gbigint_body*, _ntl_gbigint_body*, _ntl_gbigint_body*, _ntl_gbigint_body**)':
/home/jamesdang/ntl-11.3.2/src/lip.cpp:5642: undefined reference to __gmpz_clear' /usr/bin/ld: /home/jamesdang/ntl-11.3.2/src/lip.cpp:5642: undefined reference to __gmpz_clear'
/usr/bin/ld: /home/jamesdang/ntl-11.3.2/src/lip.cpp:5642: undefined reference to __gmpz_clear' /usr/bin/ld: /home/jamesdang/ntl-11.3.2/src/lip.cpp:5642: undefined reference to __gmpz_clear'
/usr/bin/ld: /usr/local/lib/libntl.a(lip.o): in function _ntl_gmp_powermod_alt': /home/jamesdang/ntl-11.3.2/src/lip.cpp:5688: undefined reference to __gmpz_import'
/usr/bin/ld: /home/jamesdang/ntl-11.3.2/src/lip.cpp:5689: undefined reference to __gmpz_import' /usr/bin/ld: /home/jamesdang/ntl-11.3.2/src/lip.cpp:5690: undefined reference to __gmpz_import'
/usr/bin/ld: /home/jamesdang/ntl-11.3.2/src/lip.cpp:5692: undefined reference to __gmpz_powm' /usr/bin/ld: /home/jamesdang/ntl-11.3.2/src/lip.cpp:5705: undefined reference to __gmpz_export'
/usr/bin/ld: /usr/local/lib/libntl.a(lip.o): in function _ntl_gpowermod(_ntl_gbigint_body*, _ntl_gbigint_body*, _ntl_gbigint_body*, _ntl_gbigint_body**)': /home/jamesdang/ntl-11.3.2/src/lip.cpp:5641: undefined reference to __gmpz_init'
/usr/bin/ld: /home/jamesdang/ntl-11.3.2/src/lip.cpp:5641: undefined reference to __gmpz_init' /usr/bin/ld: /home/jamesdang/ntl-11.3.2/src/lip.cpp:5641: undefined reference to __gmpz_init'
/usr/bin/ld: /home/jamesdang/ntl-11.3.2/src/lip.cpp:5641: undefined reference to __gmpz_init' /usr/bin/ld: /usr/local/lib/libntl.a(lip.o): in function _ntl_gpowermod(_ntl_gbigint_body*, _ntl_gbigint_body*, _ntl_gbigint_body*, _ntl_gbigint_body**) [clone .cold.71]':
/home/jamesdang/ntl-11.3.2/src/lip.cpp:5642: undefined reference to __gmpz_clear' /usr/bin/ld: /home/jamesdang/ntl-11.3.2/src/lip.cpp:5642: undefined reference to __gmpz_clear'
/usr/bin/ld: /home/jamesdang/ntl-11.3.2/src/lip.cpp:5642: undefined reference to __gmpz_clear' /usr/bin/ld: /home/jamesdang/ntl-11.3.2/src/lip.cpp:5642: undefined reference to __gmpz_clear'
/usr/bin/ld: /usr/local/lib/libntl.a(lip.o): in function void NTL::details_pthread::do_delete_aux<wrapped_mpz>(wrapped_mpz*)': /home/jamesdang/ntl-11.3.2/src/lip.cpp:5642: undefined reference to __gmpz_clear'
collect2: error: ld returned 1 exit status
make[2]: *** [CMakeFiles/helib_example.dir/build.make:87: helib_example] Error 1
make[1]: *** [CMakeFiles/Makefile2:73: CMakeFiles/helib_example.dir/all] Error 2
make: *** [Makefile:84: all] Error 2