I am currently editing a fork of Bitcoin Core. I have three libraries I would like to add as dependencies. One is my own creation (CPISync) and it depends on a second library (NTL) which in turn depends on a third (GMP).
I have looked here and here for ways to add libraries to Bitcoin Core, but neither has proved helpful. Like the first post, I am still seeing Undefined reference to errors every time (and I have tried every permutation to Makefile.am discussed there). Likwise, I have added ntl.mk and gmp.mk files (and successfully run make) like the second advises, but to no avail.
My question is: what is the standard procedure for adding libraries to Bitcoin Core? I mean this both specifically to my case and generally for Bitcoin Core, since my many searches this past week have not revealed any semblance of a beaten path.
My error looks like this:
libbitcoin_server.a(libbitcoin_server_a-net_processing.o): In function `ProcessMessage(CNode*, std::__cxx11::basic_string, std::allocator > const&, CDataStream&, long, CChainParams const&, CConnman*, std::atomic const&)':
/home/hummus/bitcoin/src/net_processing.cpp:1858: undefined reference to `IBLTSync::IBLTSync(unsigned long, unsigned long)'
/home/hummus/bitcoin/src/net_processing.cpp:1863: undefined reference to `DataObject::DataObject(std::__cxx11::basic_string, std::allocator >)'
/home/hummus/bitcoin/src/net_processing.cpp:1864: undefined reference to `IBLTSync::addElem(DataObject*)'
/home/hummus/bitcoin/src/net_processing.cpp:1875: undefined reference to `CommString::CommString(std::__cxx11::basic_string, std::allocator >, bool)'
/home/hummus/bitcoin/src/net_processing.cpp:1879: undefined reference to `IBLTSync::SyncServer(Communicant*, std::__cxx11::list >&, std::__cxx11::list >&)'
/home/hummus/bitcoin/src/net_processing.cpp:1886: undefined reference to `DataObject::to_string[abi:cxx11]() const'
/home/hummus/bitcoin/src/net_processing.cpp:1875: undefined reference to `CommString::~CommString()'
/home/hummus/bitcoin/src/net_processing.cpp:1858: undefined reference to `IBLTSync::~IBLTSync()'
libbitcoin_server.a(libbitcoin_server_a-net_processing.o): In function `ProcessMessage(CNode*, std::__cxx11::basic_string, std::allocator > const&, CDataStream&, long, CChainParams const&, CConnman*, std::atomic const&)':
/usr/include/c++/7/bits/list.tcc:70: undefined reference to `CommString::~CommString()'
/usr/include/c++/7/bits/list.tcc:70: undefined reference to `IBLTSync::~IBLTSync()'
libbitcoin_server.a(libbitcoin_server_a-net_processing.o): In function `ProcessMessage(CNode*, std::__cxx11::basic_string, std::allocator > const&, CDataStream&, long, CChainParams const&, CConnman*, std::atomic const&)':
/home/hummus/bitcoin/src/net_processing.cpp:1858: undefined reference to `IBLTSync::~IBLTSync()'
/home/hummus/bitcoin/src/net_processing.cpp:1875: undefined reference to `CommString::~CommString()'
libntl.a(lip.o): In function `redc(_ntl_gbigint_body*, _ntl_gbigint_body*, long, unsigned long, _ntl_gbigint_body*)':
(.text+0x2a3): undefined reference to `__gmpn_addmul_1'
(.text+0x368): undefined reference to `__gmpn_sub_n'
libntl.a(lip.o): In function `_ntl_rem_struct_basic::eval(long*, _ntl_gbigint_body*, _ntl_tmp_vec*)':
(.text+0x46b): undefined reference to `__gmpn_mod_1'
libntl.a(lip.o): In function `_ntl_reduce_struct_montgomery::eval(_ntl_gbigint_body**, _ntl_gbigint_body**)':
(.text+0xfcb): undefined reference to `__gmpn_addmul_1'
(.text+0x1096): undefined reference to `__gmpn_sub_n'
libntl.a(lip.o): In function `_ntl_crt_struct_basic::eval(_ntl_gbigint_body**, long const*, _ntl_tmp_vec*)':
(.text+0x11df): undefined reference to `__gmpn_addmul_1'
libntl.a(lip.o): In function `gmod_simple(_ntl_gbigint_body*, _ntl_gbigint_body*, _ntl_gbigint_body**)':
(.text+0x1c56): undefined reference to `__gmpn_tdiv_qr'
libntl.a(lip.o): In function `_ntl_rem_struct_fast::eval(long*, _ntl_gbigint_body*, _ntl_tmp_vec*)':
(.text+0x1f5d): undefined reference to `__gmpn_mod_1'
libntl.a(lip.o): In function `_ntl_rem_struct_medium::eval(long*, _ntl_gbigint_body*, _ntl_tmp_vec*)':
(.text+0x21bd): undefined reference to `__gmpn_mod_1'
libntl.a(lip.o): In function `_ntl_grshift(_ntl_gbigint_body*, long, _ntl_gbigint_body**)':
(.text+0x31e1): undefined reference to `__gmpn_rshift'
libntl.a(lip.o): In function `_ntl_glshift(_ntl_gbigint_body*, long, _ntl_gbigint_body**)':
(.text+0x34a1): undefined reference to `__gmpn_lshift'
libntl.a(lip.o): In function `_ntl_gadd(_ntl_gbigint_body*, _ntl_gbigint_body*, _ntl_gbigint_body**)':
(.text+0x3a12): undefined reference to `__gmpn_add_n'
(.text+0x3ab7): undefined reference to `__gmpn_sub_n'
(.text+0x3bda): undefined reference to `__gmpn_sub_n'
(.text+0x3c47): undefined reference to `__gmpn_sub_n'
libntl.a(lip.o): In function `_ntl_gsub(_ntl_gbigint_body*, _ntl_gbigint_body*, _ntl_gbigint_body**)':
(.text+0x3f13): undefined reference to `__gmpn_add_n'
(.text+0x40f7): undefined reference to `__gmpn_sub_n'
(.text+0x41da): undefined reference to `__gmpn_sub_n'
(.text+0x4247): undefined reference to `__gmpn_sub_n'
libntl.a(lip.o): In function `_ntl_gsubpos(_ntl_gbigint_body*, _ntl_gbigint_body*, _ntl_gbigint_body**)':
(.text+0x439c): undefined reference to `__gmpn_sub_n'
libntl.a(lip.o): In function `_ntl_gmul(_ntl_gbigint_body*, _ntl_gbigint_body*, _ntl_gbigint_body**)':
(.text+0x46ba): undefined reference to `__gmpn_mul'
(.text+0x475d): undefined reference to `__gmpn_mul'
libntl.a(lip.o): In function `_ntl_gsmul(_ntl_gbigint_body*, long, _ntl_gbigint_body**)':
(.text+0x48ba): undefined reference to `__gmpn_mul_1'
(.text+0x48f4): undefined reference to `__gmpn_lshift'
libntl.a(lip.o): In function `_ntl_gsdiv(_ntl_gbigint_body*, long, _ntl_gbigint_body**)':
(.text+0x49fd): undefined reference to `__gmpn_divrem_1'
(.text+0x4ab5): undefined reference to `__gmpn_rshift'
libntl.a(lip.o): In function `_ntl_gsmod(_ntl_gbigint_body*, long)':
(.text+0x4ba6): undefined reference to `__gmpn_mod_1'
libntl.a(lip.o): In function `_ntl_gdiv(_ntl_gbigint_body*, _ntl_gbigint_body*, _ntl_gbigint_body**, _ntl_gbigint_body**)':
(.text+0x5052): undefined reference to `__gmpn_tdiv_qr'
libntl.a(lip.o): In function `_ntl_crt_struct_fast::eval(_ntl_gbigint_body**, long const*, _ntl_tmp_vec*)':
(.text+0x55c7): undefined reference to `__gmpn_addmul_1'
libntl.a(lip.o): In function `_ntl_gsqrts(long)':
(.text+0x5856): undefined reference to `__gmpn_sqrtrem'
libntl.a(lip.o): In function `_ntl_gsqrt(_ntl_gbigint_body*, _ntl_gbigint_body**)':
(.text+0x5928): undefined reference to `__gmpn_sqrtrem'
libntl.a(lip.o): In function `_ntl_ggcd(_ntl_gbigint_body*, _ntl_gbigint_body*, _ntl_gbigint_body**)':
(.text+0x5e00): undefined reference to `__gmpn_gcd'
(.text+0x5ec2): undefined reference to `__gmpn_gcd'
libntl.a(lip.o): In function `_ntl_gexteucl(_ntl_gbigint_body*, _ntl_gbigint_body**, _ntl_gbigint_body*, _ntl_gbigint_body**, _ntl_gbigint_body**)':
(.text+0x622a): undefined reference to `__gmpn_gcdext'
libntl.a(lip.o): In function `_ntl_ginv(_ntl_gbigint_body*, _ntl_gbigint_body*, _ntl_gbigint_body**)':
(.text+0x6b64): undefined reference to `__gmpn_gcdext'
libntl.a(lip.o): In function `_ntl_gaorsmul_1(_ntl_gbigint_body*, long, long, _ntl_gbigint_body**)':
(.text+0xa181): undefined reference to `__gmpn_submul_1'
(.text+0xa2fe): undefined reference to `__gmpn_addmul_1'
(.text+0xa43f): undefined reference to `__gmpn_mul_1'
(.text+0xa599): undefined reference to `__gmpn_mul_1'
libntl.a(lip.o): In function `_ntl_quick_accum_muladd(_ntl_gbigint_body*, _ntl_gbigint_body*, long)':
(.text+0xc02b): undefined reference to `__gmpn_addmul_1'
collect2: error: ld returned 1 exit status
Makefile:3643: recipe for target 'bitcoind' failed
make[2]: \*** [bitcoind] Error 1
make[2]: Leaving directory '/home/hummus/bitcoin/src'
Makefile:9297: recipe for target 'all-recursive' failed
make[1]: \*** [all-recursive] Error 1
make[1]: Leaving directory '/home/hummus/bitcoin/src'
Makefile:746: recipe for target 'all-recursive' failed
make: *** [all-recursive] Error 1
