Static linking issue of zmq4

[jay11ca39]

Hi @pebbe ,
In my project, I use zmq4 that provides binding for c++ libzmq library.
I want to link statically to reduce dependence.

I have successfully built libzmq to build static library:
./configure --disable-shared --enable-static LDFLAGS=-lstdc++

But when i am trying to build my go sample using the below command:

CGO_LDFLAGS+='-lstdc++ -lm' CGO_ENABLED=1 GOOS=linux go build -a --ldflags '-extldflags "-static" -v' subscriber.go

t is giving the following:

xyz@go/samples$ CGO_LDFLAGS+='-lstdc++ -lm' CGO_ENABLED=1 GOOS=linux go build -a --ldflags '-extldflags "-static" -v' subscriber.go
# github.com/pebbe/zmq4
/usr/local/lib/libzmq.a(src_libzmq_la-pipe.o): In function `__gnu_cxx::new_allocator<char>::allocate(unsigned long, void const*)':
/usr/include/c++/4.8/ext/new_allocator.h:104: undefined reference to `operator new(unsigned long)'
/usr/local/lib/libzmq.a(src_libzmq_la-pipe.o): In function `std::basic_string<unsigned char, std::char_traits<unsigned char>, std::allocator<unsigned char> >::_Rep::_S_create(unsigned long, unsigned long, std::allocator<unsigned char> const&)':
/usr/include/c++/4.8/bits/basic_string.tcc:552: undefined reference to `std::__throw_length_error(char const*)'
/usr/local/lib/libzmq.a(src_libzmq_la-pipe.o): In function `_S_construct<unsigned char const*>':
/usr/include/c++/4.8/bits/basic_string.tcc:133: undefined reference to `std::__throw_logic_error(char const*)'
/usr/local/lib/libzmq.a(src_libzmq_la-pipe.o): In function `zmq::pipe_t::hiccup()':
/home/jay/2017/EMF/libzmq/libzmq/src/pipe.cpp:503: undefined reference to `std::nothrow'
/home/jay/2017/EMF/libzmq/libzmq/src/pipe.cpp:503: undefined reference to `operator new(unsigned long, std::nothrow_t const&)'
/home/jay/2017/EMF/libzmq/libzmq/src/pipe.cpp:505: undefined reference to `operator new(unsigned long, std::nothrow_t const&)'
/home/jay/2017/EMF/libzmq/libzmq/src/pipe.cpp:503: undefined reference to `std::nothrow'
/home/jay/2017/EMF/libzmq/libzmq/src/pipe.cpp:503: undefined reference to `operator delete(void*, std::nothrow_t const&)'
/usr/local/lib/libzmq.a(src_libzmq_la-pipe.o): In function `zmq::pipepair(zmq::object_t**, zmq::pipe_t**, int*, bool*)':
/home/jay/2017/EMF/libzmq/libzmq/src/pipe.cpp:52: undefined reference to `std::nothrow'
/home/jay/2017/EMF/libzmq/libzmq/src/pipe.cpp:52: undefined reference to `operator new(unsigned long, std::nothrow_t const&)'
/home/jay/2017/EMF/libzmq/libzmq/src/pipe.cpp:59: undefined reference to `std::nothrow'
/home/jay/2017/EMF/libzmq/libzmq/src/pipe.cpp:61: undefined reference to `operator new(unsigned long, std::nothrow_t const&)'
/home/jay/2017/EMF/libzmq/libzmq/src/pipe.cpp:54: undefined reference to `operator new(unsigned long, std::nothrow_t const&)'
/home/jay/2017/EMF/libzmq/libzmq/src/pipe.cpp:59: undefined reference to `std::nothrow'
/home/jay/2017/EMF/libzmq/libzmq/src/pipe.cpp:59: undefined reference to `operator new(unsigned long, std::nothrow_t const&)'
/home/jay/2017/EMF/libzmq/libzmq/src/pipe.cpp:65: undefined reference to `std::nothrow'
/home/jay/2017/EMF/libzmq/libzmq/src/pipe.cpp:65: undefined reference to `operator new(unsigned long, std::nothrow_t const&)'
/home/jay/2017/EMF/libzmq/libzmq/src/pipe.cpp:68: undefined reference to `std::nothrow'
/home/jay/2017/EMF/libzmq/libzmq/src/pipe.cpp:68: undefined reference to `operator new(unsigned long, std::nothrow_t const&)'
/home/jay/2017/EMF/libzmq/libzmq/src/pipe.cpp:52: undefined reference to `std::nothrow'
/home/jay/2017/EMF/libzmq/libzmq/src/pipe.cpp:52: undefined reference to `operator delete(void*, std::nothrow_t const&)'
/home/jay/2017/EMF/libzmq/libzmq/src/pipe.cpp:59: undefined reference to `std::nothrow'
/home/jay/2017/EMF/libzmq/libzmq/src/pipe.cpp:59: undefined reference to `operator delete(void*, std::nothrow_t const&)'
/home/jay/2017/EMF/libzmq/libzmq/src/pipe.cpp:68: undefined reference to `std::nothrow'
/home/jay/2017/EMF/libzmq/libzmq/src/pipe.cpp:68: undefined reference to `operator delete(void*, std::nothrow_t const&)'
/usr/local/lib/libzmq.a(src_libzmq_la-pipe.o): In function `zmq::pipe_t::~pipe_t()':
/home/jay/2017/EMF/libzmq/libzmq/src/pipe.cpp:102: undefined reference to `operator delete(void*)'
/usr/local/lib/libzmq.a(src_libzmq_la-pipe.o): In function `zmq::array_item_t<1>::~array_item_t()':
/home/jay/2017/EMF/libzmq/libzmq/src/array.hpp:64: undefined reference to `operator delete(void*)'
/usr/local/lib/libzmq.a(src_libzmq_la-pipe.o): In function `zmq::array_item_t<2>::~array_item_t()':
/home/jay/2017/EMF/libzmq/libzmq/src/array.hpp:64: undefined reference to `operator delete(void*)'
/usr/local/lib/libzmq.a(src_libzmq_la-pipe.o): In function `zmq::array_item_t<3>::~array_item_t()':
/home/jay/2017/EMF/libzmq/libzmq/src/array.hpp:64: undefined reference to `operator delete(void*)'
/usr/local/lib/libzmq.a(src_libzmq_la-pipe.o): In function `zmq::ypipe_base_t<zmq::msg_t>::~ypipe_base_t()':
/home/jay/2017/EMF/libzmq/libzmq/src/ypipe_base.hpp:44: undefined reference to `operator delete(void*)'
/usr/local/lib/libzmq.a(src_libzmq_la-pipe.o):/usr/include/c++/4.8/ext/new_allocator.h:110: more undefined references to `operator delete(void*)' follow
/usr/local/lib/libzmq.a(src_libzmq_la-pipe.o):(.rodata._ZTIN3zmq12array_item_tILi1EEE[_ZTIN3zmq12array_item_tILi1EEE]+0x0): undefined reference to `vtable for __cxxabiv1::__class_type_info'
/usr/local/lib/libzmq.a(src_libzmq_la-pipe.o):(.rodata._ZTIN3zmq12array_item_tILi2EEE[_ZTIN3zmq12array_item_tILi2EEE]+0x0): undefined reference to `vtable for __cxxabiv1::__class_type_info'
/usr/local/lib/libzmq.a(src_libzmq_la-pipe.o):(.rodata._ZTIN3zmq12array_item_tILi3EEE[_ZTIN3zmq12array_item_tILi3EEE]+0x0): undefined reference to `vtable for __cxxabiv1::__class_type_info'
/usr/local/lib/libzmq.a(src_libzmq_la-pipe.o):(.rodata._ZTIN3zmq6pipe_tE[_ZTIN3zmq6pipe_tE]+0x0): undefined reference to `vtable for __cxxabiv1::__vmi_class_type_info'
/usr/local/lib/libzmq.a(src_libzmq_la-pipe.o):(.rodata._ZTIN3zmq12ypipe_base_tINS_5msg_tEEE[_ZTIN3zmq12ypipe_base_tINS_5msg_tEEE]+0x0): undefined reference to `vtable for __cxxabiv1::__class_type_info'
/usr/local/lib/libzmq.a(src_libzmq_la-pipe.o):(.rodata._ZTIN3zmq16ypipe_conflate_tINS_5msg_tEEE[_ZTIN3zmq16ypipe_conflate_tINS_5msg_tEEE]+0x0): undefined reference to `vtable for __cxxabiv1::__si_class_type_info'
/usr/local/lib/libzmq.a(src_libzmq_la-pipe.o):(.rodata._ZTIN3zmq7ypipe_tINS_5msg_tELi256EEE[_ZTIN3zmq7ypipe_tINS_5msg_tELi256EEE]+0x0): undefined reference to `vtable for __cxxabiv1::__si_class_type_info'
/usr/local/lib/libzmq.a(src_libzmq_la-pipe.o):(.rodata._ZTVN3zmq12ypipe_base_tINS_5msg_tEEE[_ZTVN3zmq12ypipe_base_tINS_5msg_tEEE]+0x20): undefined reference to `__cxa_pure_virtual'
/usr/local/lib/libzmq.a(src_libzmq_la-pipe.o):(.rodata._ZTVN3zmq12ypipe_base_tINS_5msg_tEEE[_ZTVN3zmq12ypipe_base_tINS_5msg_tEEE]+0x28): undefined reference to `__cxa_pure_virtual'
/usr/local/lib/libzmq.a(src_libzmq_la-pipe.o):(.rodata._ZTVN3zmq12ypipe_base_tINS_5msg_tEEE[_ZTVN3zmq12ypipe_base_tINS_5msg_tEEE]+0x30): undefined reference to `__cxa_pure_virtual'
/usr/local/lib/libzmq.a(src_libzmq_la-pipe.o):(.rodata._ZTVN3zmq12ypipe_base_tINS_5msg_tEEE[_ZTVN3zmq12ypipe_base_tINS_5msg_tEEE]+0x38): undefined reference to `__cxa_pure_virtual'
/usr/local/lib/libzmq.a(src_libzmq_la-pipe.o):(.rodata._ZTVN3zmq12ypipe_base_tINS_5msg_tEEE[_ZTVN3zmq12ypipe_base_tINS_5msg_tEEE]+0x40): undefined reference to `__cxa_pure_virtual'
/usr/local/lib/libzmq.a(src_libzmq_la-pipe.o):(.rodata._ZTVN3zmq12ypipe_base_tINS_5msg_tEEE[_ZTVN3zmq12ypipe_base_tINS_5msg_tEEE]+0x48): more undefined references to `__cxa_pure_virtual' follow
/usr/local/lib/libzmq.a(src_libzmq_la-pipe.o):(.eh_frame+0x3bb): undefined reference to `__gxx_personality_v0'
/usr/local/lib/libzmq.a(src_libzmq_la-stream.o): In function `std::_Rb_tree_iterator<std::pair<std::basic_string<unsigned char, std::char_traits<unsigned char>, std::allocator<unsigned char> > const, zmq::stream_t::outpipe_t> >::operator++()':
/usr/include/c++/4.8/bits/stl_tree.h:189: undefined reference to `std::_Rb_tree_increment(std::_Rb_tree_node_base*)'
/usr/local/lib/libzmq.a(src_libzmq_la-stream.o): In function `zmq::stream_t::xsetsockopt(int, void const*, unsigned long)':
/home/jay/2017/EMF/libzmq/libzmq/src/stream.cpp:188: undefined reference to `std::string::assign(char const*, unsigned long)'
/usr/local/lib/libzmq.a(src_libzmq_la-stream.o): In function `__gnu_cxx::new_allocator<char>::allocate(unsigned long, void const*)':
/usr/include/c++/4.8/ext/new_allocator.h:104: undefined reference to `operator new(unsigned long)'
/usr/local/lib/libzmq.a(src_libzmq_la-stream.o): In function `std::basic_string<unsigned char, std::char_traits<unsigned char>, std::allocator<unsigned char> >::_Rep::_S_create(unsigned long, unsigned long, std::allocator<unsigned char> const&)':

Is any flag is missed in go sample building?

[omani]

try the following:

CGO_CPPFLAGS="-I/usr/include" CGO_LDFLAGS="-L/usr/lib -L/usr/lib/x86_64-linux-gnu -lzmq -lpthread -lsodium -lrt -lstdc++ -lm -lc -lgcc" go build -v --ldflags '-extldflags "-static"' -a subscriber.go

change directories accordingly, if necessary.

[darkdragon-001]

This should be added to the README as it might be helpful for many people!