Boost C++ code not building, can someone help me with library linking? - c++

I've followed the tutorial from here to set up my Eclipse installation with Boost and the examples at the bottom of the tutorial to test the compilation work. I'm trying to use asio for sockets, but I'm receiving the following when compiling:
**** Build of configuration Debug for project Client ****
**** Internal Builder is used for build ****
g++ -IC:\MinGW\Boost\include\boost-1_53 -O0 -g3 -Wall -c -fmessage-length=0 -o src\Client.o ..\src\Client.cpp
g++ -LC:\MinGW\Boost\lib -o Client.exe src\Client.o
src\Client.o: In function `__static_initialization_and_destruction_0':
C:/MinGW/Boost/include/boost-1_53/boost/system/error_code.hpp:214: undefined reference to `boost::system::generic_category()'
C:/MinGW/Boost/include/boost-1_53/boost/system/error_code.hpp:215: undefined reference to `boost::system::generic_category()'
C:/MinGW/Boost/include/boost-1_53/boost/system/error_code.hpp:216: undefined reference to `boost::system::system_category()'
src\Client.o: In function `boost::system::error_code::error_code()':
C:/MinGW/Boost/include/boost-1_53/boost/system/error_code.hpp:315: undefined reference to `boost::system::system_category()'
src\Client.o: In function `boost::asio::error::get_system_category()':
C:/MinGW/Boost/include/boost-1_53/boost/asio/error.hpp:216: undefined reference to `boost::system::system_category()'
src\Client.o: In function `boost::asio::detail::winsock_init_base::startup(boost::asio::detail::winsock_init_base::data&, unsigned char, unsigned char)':
C:/MinGW/Boost/include/boost-1_53/boost/asio/detail/impl/winsock_init.ipp:39: undefined reference to `__imp_WSAStartup'
src\Client.o: In function `boost::asio::detail::winsock_init_base::cleanup(boost::asio::detail::winsock_init_base::data&)':
C:/MinGW/Boost/include/boost-1_53/boost/asio/detail/impl/winsock_init.ipp:48: undefined reference to `__imp_WSACleanup'
src\Client.o: In function `boost::asio::detail::socket_ops::clear_last_error()':
C:/MinGW/Boost/include/boost-1_53/boost/asio/detail/impl/socket_ops.ipp:51: undefined reference to `__imp_WSASetLastError'
src\Client.o: In function `boost::asio::detail::socket_ops::close(unsigned long long, unsigned char&, bool, boost::system::error_code&)':
C:/MinGW/Boost/include/boost-1_53/boost/asio/detail/impl/socket_ops.ipp:297: undefined reference to `__imp_closesocket'
C:/MinGW/Boost/include/boost-1_53/boost/asio/detail/impl/socket_ops.ipp:314: undefined reference to `__imp_ioctlsocket'
C:/MinGW/Boost/include/boost-1_53/boost/asio/detail/impl/socket_ops.ipp:329: undefined reference to `__imp_closesocket'
src\Client.o: In function `boost::asio::detail::socket_ops::recv(unsigned long long, _WSABUF*, unsigned long long, int, boost::system::error_code&)':
C:/MinGW/Boost/include/boost-1_53/boost/asio/detail/impl/socket_ops.ipp:683: undefined reference to `__imp_WSARecv'
src\Client.o: In function `boost::asio::detail::socket_ops::send(unsigned long long, _WSABUF const*, unsigned long long, int, boost::system::error_code&)':
C:/MinGW/Boost/include/boost-1_53/boost/asio/detail/impl/socket_ops.ipp:1066: undefined reference to `__imp_WSASend'
src\Client.o: In function `boost::asio::detail::socket_ops::socket(int, int, int, boost::system::error_code&)':
C:/MinGW/Boost/include/boost-1_53/boost/asio/detail/impl/socket_ops.ipp:1294: undefined reference to `__imp_WSASocketA'
C:/MinGW/Boost/include/boost-1_53/boost/asio/detail/impl/socket_ops.ipp:1305: undefined reference to `__imp_setsockopt'
src\Client.o: In function `boost::asio::detail::socket_ops::poll_read(unsigned long long, unsigned char, boost::system::error_code&)':
C:/MinGW/Boost/include/boost-1_53/boost/asio/detail/impl/socket_ops.ipp:1716: undefined reference to `__imp_select'
src\Client.o: In function `boost::asio::detail::socket_ops::poll_connect(unsigned long long, boost::system::error_code&)':
C:/MinGW/Boost/include/boost-1_53/boost/asio/detail/impl/socket_ops.ipp:1797: undefined reference to `__imp_select'
src\Client.o: In function `boost::asio::detail::socket_ops::translate_addrinfo_error(int)':
C:/MinGW/Boost/include/boost-1_53/boost/asio/detail/impl/socket_ops.ipp:2869: undefined reference to `__imp_WSAGetLastError'
src\Client.o: In function `boost::asio::detail::socket_ops::getaddrinfo(char const*, char const*, addrinfo const&, addrinfo**, boost::system::error_code&)':
C:/MinGW/Boost/include/boost-1_53/boost/asio/detail/impl/socket_ops.ipp:2887: undefined reference to `__imp_getaddrinfo'
src\Client.o: In function `boost::asio::detail::socket_ops::freeaddrinfo(addrinfo*)':
C:/MinGW/Boost/include/boost-1_53/boost/asio/detail/impl/socket_ops.ipp:2930: undefined reference to `__imp_freeaddrinfo'
src\Client.o: In function `unsigned long long boost::asio::detail::socket_ops::error_wrapper<unsigned long long>(unsigned long long, boost::system::error_code&)':
C:/MinGW/Boost/include/boost-1_53/boost/asio/detail/impl/socket_ops.ipp:62: undefined reference to `__imp_WSAGetLastError'
src\Client.o: In function `int boost::asio::detail::socket_ops::error_wrapper<int>(int, boost::system::error_code&)':
C:/MinGW/Boost/include/boost-1_53/boost/asio/detail/impl/socket_ops.ipp:62: undefined reference to `__imp_WSAGetLastError'
src\Client.o: In function `int boost::asio::detail::socket_ops::call_connect<int>(int boost::asio::detail::socket_ops::msghdr::*, unsigned long long, sockaddr const*, unsigned long long)':
C:/MinGW/Boost/include/boost-1_53/boost/asio/detail/impl/socket_ops.ipp:452: undefined reference to `__imp_connect'
src\Client.o: In function `int boost::asio::detail::socket_ops::call_setsockopt<int>(int boost::asio::detail::socket_ops::msghdr::*, unsigned long long, int, int, void const*, unsigned long long)':
C:/MinGW/Boost/include/boost-1_53/boost/asio/detail/impl/socket_ops.ipp:1340: undefined reference to `__imp_setsockopt'
src\Client.o: In function `int boost::asio::detail::socket_ops::call_getsockopt<int>(int boost::asio::detail::socket_ops::msghdr::*, unsigned long long, int, int, void*, unsigned long long*)':
C:/MinGW/Boost/include/boost-1_53/boost/asio/detail/impl/socket_ops.ipp:1426: undefined reference to `__imp_getsockopt'
collect2.exe: error: ld returned 1 exit status
Build error occurred, build is stopped
Time consumed: 4033 ms.
I'm assuming I've gone wrong somewhere when linking the libraries. Could somebody please explain what the author of that tutorial meant by
Under libraries, add the specific boost libraries you need.
For example I have added:
boost_thread-mgw47-mt-d-1_52
boost_system-mgw47-mt-d-1_52
and explain (in detail) how to go about this in Eclipse please (for both Debug and Release)? Thanks.
Oh and if you want the code, it's simply the code found here.

The errors you get are indeed linking errors, because of missing libraries (probably the ones you list).
A quick search led to these two SO entries:
How to add a library to eclipse c project
C++: external library in CDT
Note that in certain versions of eclipse/CDT there's a Library tab in the symbols & path configuration window, but it doesn't seem to be present in all versions, so you must resort to the linker configuration panel as explained in the answers linked above.
If you went through the previous tutorial from the same site you link in your question (the one about setting up eclipse and cdt), and managed to get the sample programme compiled, then the 2 boost libraries are the only missing. Otherwise, you might need to add a few others (some of the missing symbols in the error messages pertain to the winsock system library).

Related

Facing undefined reference error after upgrading Protobuf

I had upgraded the protoc version from 3.0.0 to 3.15.2 . Now I am unable to compile the program that uses protoc output files(*.pb.cpp , *.pb.h). I am getting the error as shown below:
In function `google::protobuf::io::EpsCopyOutputStream::EnsureSpace(unsigned char*)':
/usr/local/include/google/protobuf/io/coded_stream.h:694: undefined reference to `google::protobuf::io::EpsCopyOutputStream::EnsureSpaceFallback(unsigned char*)'
In function `google::protobuf::internal::TaggedPtr<std::string>::Set(std::string*)':
/usr/local/include/google/protobuf/arenastring.h:101: undefined reference to `google::protobuf::internal::fixed_address_empty_string'
In function `google::protobuf::Arena::AllocateAlignedWithHook(unsigned long, unsigned long, std::type_info const*)':
/usr/local/include/google/protobuf/arena.h:700: undefined reference to `google::protobuf::Arena::AllocateAlignedWithHook(unsigned long, std::type_info const*)'
In function `google::protobuf::internal::ReadTag(char const*, unsigned int*, unsigned int)':
/usr/local/include/google/protobuf/parse_context.h:544: undefined reference to `google::protobuf::internal::ReadTagFallback(char const*, unsigned int)'
In function `google::protobuf::Arena::SpaceAllocated() const':
/usr/local/include/google/protobuf/arena.h:349: undefined reference to `google::protobuf::internal::ThreadSafeArena::SpaceAllocated() const'
In function `google::protobuf::UnknownFieldSet::Clear()':
/usr/local/include/google/protobuf/unknown_field_set.h:312: undefined reference to `google::protobuf::UnknownFieldSet::ClearFallback()'
I am facing this undefined reference error in google::protobuf path . There are so many lines of same errors of the kind show above.
Do I have to include any other additional library for the upgraded version ?
or
Do I have to change path of any library ? as here undefined reference to google protobuf
Any kind of help with respect to this is appreciated .
Thank you

Build Peerconnection with WebRTC static library failed

I met some issues when I wanted to build the peerconnection example with linking Webrtc as a static library.
My build environment and the target are both ubuntu 18.04, and I used the Github repo https://github.com/vsimon/webrtcbuilds to build the
Webrtc as a static library.
Then there were many link errors about absl libray, after some investigations, I added some build args to eliminate the majority of them as below:
is_debug=false
is_component_build=false
is_clang=false
rtc_include_tests=false
rtc_use_h264=true
rtc_enable_protobuf=false
use_rtti=true
use_custom_libcxx=false
treat_warnings_as_errors=false
use_ozone=true
But it still has several link errors that I can't tackle:
/home/alexander/works/lab/webrtc-native/test_project/peerconnection/lib/Release/libwebrtc_full.a(mutex.o): In function `absl::DeadlineFromTimeout(absl::Duration) [clone .isra.8]':
mutex.cc:(.text._ZN4abslL19DeadlineFromTimeoutENS_8DurationE.isra.8+0x24): undefined reference to `absl::TimeFromTimeval(timeval)'
/home/alexander/works/lab/webrtc-native/test_project/peerconnection/lib/Release/libwebrtc_full.a(mutex.o): In function `absl::Mutex::AwaitWithDeadline(absl::Condition const&, absl::Time)':
mutex.cc:(.text._ZN4absl5Mutex17AwaitWithDeadlineERKNS_9ConditionENS_4TimeE+0xa4): undefined reference to `absl::ToUnixNanos(absl::Time)'
/home/alexander/works/lab/webrtc-native/test_project/peerconnection/lib/Release/libwebrtc_full.a(mutex.o): In function `absl::Mutex::LockWhenWithDeadline(absl::Condition const&, absl::Time)':
mutex.cc:(.text._ZN4absl5Mutex20LockWhenWithDeadlineERKNS_9ConditionENS_4TimeE+0x27): undefined reference to `absl::ToUnixNanos(absl::Time)'
/home/alexander/works/lab/webrtc-native/test_project/peerconnection/lib/Release/libwebrtc_full.a(mutex.o): In function `absl::Mutex::ReaderLockWhenWithDeadline(absl::Condition const&, absl::Time)':
mutex.cc:(.text._ZN4absl5Mutex26ReaderLockWhenWithDeadlineERKNS_9ConditionENS_4TimeE+0x27): undefined reference to `absl::ToUnixNanos(absl::Time)'
/home/alexander/works/lab/webrtc-native/test_project/peerconnection/lib/Release/libwebrtc_full.a(mutex.o): In function `absl::CondVar::WaitWithDeadline(absl::Mutex*, absl::Time)':
mutex.cc:(.text._ZN4absl7CondVar16WaitWithDeadlineEPNS_5MutexENS_4TimeE+0x27): undefined reference to `absl::ToUnixNanos(absl::Time)'
/home/alexander/works/lab/webrtc-native/test_project/peerconnection/lib/Release/libwebrtc_full.a(bind.o): In function `absl::str_format_internal::FormatUntyped(absl::str_format_internal::FormatRawSinkImpl, absl::str_format_internal::UntypedFormatSpecImpl, absl::Span<absl::str_format_internal::FormatArgImpl const>)':
bind.cc:(.text._ZN4absl19str_format_internal13FormatUntypedENS0_17FormatRawSinkImplENS0_21UntypedFormatSpecImplENS_4SpanIKNS0_13FormatArgImplEEE+0x159): undefined reference to `absl::str_format_internal::kTags'
bind.cc:(.text._ZN4absl19str_format_internal13FormatUntypedENS0_17FormatRawSinkImplENS0_21UntypedFormatSpecImplENS_4SpanIKNS0_13FormatArgImplEEE+0x457): undefined reference to `absl::str_format_internal::ConsumeUnboundConversion(char const*, char const*, absl::str_format_internal::UnboundConversion*, int*)'
/home/alexander/works/lab/webrtc-native/test_project/peerconnection/lib/Release/libwebrtc_full.a(bind.o): In function `absl::str_format_internal::Summarize[abi:cxx11](absl::str_format_internal::UntypedFormatSpecImpl, absl::Span<absl::str_format_internal::FormatArgImpl const>)':
bind.cc:(.text._ZN4absl19str_format_internal9SummarizeB5cxx11ENS0_21UntypedFormatSpecImplENS_4SpanIKNS0_13FormatArgImplEEE+0x18b): undefined reference to `absl::str_format_internal::kTags'
bind.cc:(.text._ZN4absl19str_format_internal9SummarizeB5cxx11ENS0_21UntypedFormatSpecImplENS_4SpanIKNS0_13FormatArgImplEEE+0xa12): undefined reference to `absl::str_format_internal::ConsumeUnboundConversion(char const*, char const*, absl::str_format_internal::UnboundConversion*, int*)'
I hope anyone can give me some hints to fix them, thanks very much!

Undefined reference problem with antlr4 c++ target

I am taking a compiler design course and I am trying to learn about ANTLR4 with a C++ target.
Well, that's what I went through:
I Wrote the grammar in a file named "ArrayInit.g4"
Compiled it using ANTLR4 tool and the command "antlr4 -Dlanguage=Cpp -o build" and got a bunch of files in the "build/" directory where I added also a simple file containing the main function int main(){return 0;}
Downloaded the C++ runtime and put it in a directory "runtime/"
In this stage I got stuck, I could not compile the .cpp files using the command "g++ -std=c++11 -I ../runtime -o exec *.cpp" and i get the following error messages:
/tmp/cc8VNGfx.o: In function `ArrayInitLexer::ArrayInitLexer(antlr4::CharStream*)':
ArrayInitLexer.cpp:(.text+0xc8): undefined reference to `antlr4::Lexer::Lexer(antlr4::CharStream*)'
ArrayInitLexer.cpp:(.text+0x116): undefined reference to `antlr4::atn::LexerATNSimulator::LexerATNSimulator(antlr4::Lexer*, antlr4::atn::ATN const&, std::vector<antlr4::dfa::DFA, std::allocator<antlr4::dfa::DFA> >&, std::unordered_set<std::shared_ptr<antlr4::atn::PredictionContext>, antlr4::atn::PredictionContextHasher, antlr4::atn::PredictionContextComparer, std::allocator<std::shared_ptr<antlr4::atn::PredictionContext> > >&)'
/tmp/cc8VNGfx.o: In function `ArrayInitLexer::Initializer::Initializer()':
ArrayInitLexer.cpp:(.text+0x376): undefined reference to `antlr4::dfa::Vocabulary::getLiteralName[abi:cxx11](unsigned long) const'
ArrayInitLexer.cpp:(.text+0x3a6): undefined reference to `antlr4::dfa::Vocabulary::getSymbolicName[abi:cxx11](unsigned long) const'
ArrayInitLexer.cpp:(.text+0x4b2): undefined reference to `antlr4::atn::ATNDeserializer::ATNDeserializer()'
ArrayInitLexer.cpp:(.text+0x4d2): undefined reference to `antlr4::atn::ATNDeserializer::deserialize(std::vector<unsigned short, std::allocator<unsigned short> > const&)'
ArrayInitLexer.cpp:(.text+0x4e8): undefined reference to `antlr4::atn::ATN::operator=(antlr4::atn::ATN&&)'
ArrayInitLexer.cpp:(.text+0x4f7): undefined reference to `antlr4::atn::ATN::~ATN()'
ArrayInitLexer.cpp:(.text+0x503): undefined reference to `antlr4::atn::ATN::getNumberOfDecisions() const'
ArrayInitLexer.cpp:(.text+0x551): undefined reference to `antlr4::atn::ATN::getDecisionState(unsigned long) const'
ArrayInitLexer.cpp:(.text+0x598): undefined reference to `antlr4::atn::ATNDeserializer::~ATNDeserializer()'
ArrayInitLexer.cpp:(.text+0x601): undefined reference to `antlr4::atn::ATNDeserializer::~ATNDeserializer()'
/tmp/cc8VNGfx.o: In function `__static_initialization_and_destruction_0(int, int)':
ArrayInitLexer.cpp:(.text+0x6ec): undefined reference to `antlr4::atn::ATN::ATN()'
ArrayInitLexer.cpp:(.text+0x701): undefined reference to `antlr4::atn::ATN::~ATN()'
ArrayInitLexer.cpp:(.text+0xee6): undefined reference to `antlr4::dfa::Vocabulary::Vocabulary(std::vector<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > const&, std::vector<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > const&)'
ArrayInitLexer.cpp:(.text+0xefb): undefined reference to `antlr4::dfa::Vocabulary::~Vocabulary()'
/tmp/cc8VNGfx.o: In function `antlr4::Lexer::~Lexer()':
ArrayInitLexer.cpp:(.text._ZN6antlr45LexerD2Ev[_ZN6antlr45LexerD5Ev]+0xf): undefined reference to `vtable for antlr4::Lexer'
ArrayInitLexer.cpp:(.text._ZN6antlr45LexerD2Ev[_ZN6antlr45LexerD5Ev]+0x1d): undefined reference to `vtable for antlr4::Lexer'
ArrayInitLexer.cpp:(.text._ZN6antlr45LexerD2Ev[_ZN6antlr45LexerD5Ev]+0x7d): undefined reference to `antlr4::TokenSource::~TokenSource()'
ArrayInitLexer.cpp:(.text._ZN6antlr45LexerD2Ev[_ZN6antlr45LexerD5Ev]+0x89): undefined reference to `antlr4::Recognizer::~Recognizer()'
/tmp/cc8VNGfx.o: In function `void __gnu_cxx::new_allocator<antlr4::dfa::DFA>::construct<antlr4::dfa::DFA, antlr4::atn::DecisionState*, unsigned long&>(antlr4::dfa::DFA*, antlr4::atn::DecisionState*&&, unsigned long&)':
ArrayInitLexer.cpp:(.text._ZN9__gnu_cxx13new_allocatorIN6antlr43dfa3DFAEE9constructIS3_JPNS1_3atn13DecisionStateERmEEEvPT_DpOT0_[_ZN9__gnu_cxx13new_allocatorIN6antlr43dfa3DFAEE9constructIS3_JPNS1_3atn13DecisionStateERmEEEvPT_DpOT0_]+0x60): undefined reference to `antlr4::dfa::DFA::DFA(antlr4::atn::DecisionState*, unsigned long)'
/tmp/cc8VNGfx.o: In function `void std::_Construct<antlr4::dfa::DFA, antlr4::dfa::DFA>(antlr4::dfa::DFA*, antlr4::dfa::DFA&&)':
ArrayInitLexer.cpp:(.text._ZSt10_ConstructIN6antlr43dfa3DFAEJS2_EEvPT_DpOT0_[_ZSt10_ConstructIN6antlr43dfa3DFAEJS2_EEvPT_DpOT0_]+0x44): undefined reference to `antlr4::dfa::DFA::DFA(antlr4::dfa::DFA&&)'
/tmp/cc8VNGfx.o:(.data.rel.ro._ZTV14ArrayInitLexer[_ZTV14ArrayInitLexer]+0x38): undefined reference to `antlr4::Recognizer::getTokenTypeMap[abi:cxx11]()'
/tmp/cc8VNGfx.o:(.data.rel.ro._ZTV14ArrayInitLexer[_ZTV14ArrayInitLexer]+0x40): undefined reference to `antlr4::Recognizer::getRuleIndexMap[abi:cxx11]()'
/tmp/cc8VNGfx.o:(.data.rel.ro._ZTV14ArrayInitLexer[_ZTV14ArrayInitLexer]+0x48): undefined reference to `antlr4::Recognizer::getTokenType(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)'
/tmp/cc8VNGfx.o:(.data.rel.ro._ZTV14ArrayInitLexer[_ZTV14ArrayInitLexer]+0x60): undefined reference to `antlr4::Recognizer::getErrorHeader[abi:cxx11](antlr4::RecognitionException*)'
/tmp/cc8VNGfx.o:(.data.rel.ro._ZTV14ArrayInitLexer[_ZTV14ArrayInitLexer]+0x68): undefined reference to `antlr4::Recognizer::getTokenErrorDisplay[abi:cxx11](antlr4::Token*)'
/tmp/cc8VNGfx.o:(.data.rel.ro._ZTV14ArrayInitLexer[_ZTV14ArrayInitLexer]+0x70): undefined reference to `antlr4::Recognizer::addErrorListener(antlr4::ANTLRErrorListener*)'
/tmp/cc8VNGfx.o:(.data.rel.ro._ZTV14ArrayInitLexer[_ZTV14ArrayInitLexer]+0x78): undefined reference to `antlr4::Recognizer::removeErrorListener(antlr4::ANTLRErrorListener*)'
/tmp/cc8VNGfx.o:(.data.rel.ro._ZTV14ArrayInitLexer[_ZTV14ArrayInitLexer]+0x80): undefined reference to `antlr4::Recognizer::removeErrorListeners()'
/tmp/cc8VNGfx.o:(.data.rel.ro._ZTV14ArrayInitLexer[_ZTV14ArrayInitLexer]+0x88): undefined reference to `antlr4::Recognizer::getErrorListenerDispatch()'
/tmp/cc8VNGfx.o:(.data.rel.ro._ZTV14ArrayInitLexer[_ZTV14ArrayInitLexer]+0x90): undefined reference to `antlr4::Recognizer::sempred(antlr4::RuleContext*, unsigned long, unsigned long)'
/tmp/cc8VNGfx.o:(.data.rel.ro._ZTV14ArrayInitLexer[_ZTV14ArrayInitLexer]+0x98): undefined reference to `antlr4::Recognizer::precpred(antlr4::RuleContext*, int)'
/tmp/cc8VNGfx.o:(.data.rel.ro._ZTV14ArrayInitLexer[_ZTV14ArrayInitLexer]+0xa0): undefined reference to `antlr4::Recognizer::action(antlr4::RuleContext*, unsigned long, unsigned long)'
/tmp/cc8VNGfx.o:(.data.rel.ro._ZTV14ArrayInitLexer[_ZTV14ArrayInitLexer]+0xa8): undefined reference to `antlr4::Recognizer::getState() const'
/tmp/cc8VNGfx.o:(.data.rel.ro._ZTV14ArrayInitLexer[_ZTV14ArrayInitLexer]+0xb8): undefined reference to `antlr4::Lexer::getInputStream()'
/tmp/cc8VNGfx.o:(.data.rel.ro._ZTV14ArrayInitLexer[_ZTV14ArrayInitLexer]+0xc0): undefined reference to `antlr4::Lexer::setInputStream(antlr4::IntStream*)'
I am totaly new to C++ and I am skipping a basic idea maybe.
Edit1: I am using Linux
Edit2:
When I execute the commande antlr4 -Dlanguage=Cpp -o build I get a bunch of .cpp and .h files as: ArrayInitLexer.h and many of them include antlr4-runtime.h .This header file is present in the runtime/ folder which by it self includes many other header files in the same directory (.i.e runtime/) that contains .h and .cpp files (I see no .a or .so files).
You can find the runtime here under the C++ target section or directly from here
Your compile command doesn't look quite right.
Note that g++ takes an uppercase -L switch to specify a location to look for libraries, and a lowercase -l to specify the filename of a library to link, not including a lib prefix and the file suffix. Since in at least the version I see, antlr provides a "libantlr.a", this would be -l antlr.
Also, the library should be given after your program source or object file(s), because in most cases the linker decides what pieces of libraries to include based on whether they provide any symbols it knows are needed by what it has seen so far.
So I'm not sure if this will solve all the problems, but a step forward would be:
g++ -std=c++11 -Wall -Wextra *.cpp -L ../runtime -l antlr -o exec
I've also taken the liberty of adding the -W flags to enable a default set of compiler warnings, which is a must when writing new C++ code, whether you're new to the language or not.

G++ undefined references for libuvc and opencv2

I'm trying to compile a C++ program which includes the libuvc.h header file and some more header files of opencv2.
The problem is, that I'm getting the following errors (undefinded references):
root#Raspi_DataHarvest:~/Schreibtisch# g++ UVCCameraHandler.cpp -I/usr/local/include/libuvc -I/usr/local/include/opencv2
/tmp/ccvQZdkd.o: In function `UVCCameraHandler::start(int, CameraProperties, int)':
UVCCameraHandler.cpp:(.text+0x164): undefined reference to `uvc_init'
UVCCameraHandler.cpp:(.text+0x184): undefined reference to `uvc_perror'
UVCCameraHandler.cpp:(.text+0x204): undefined reference to `uvc_get_device_descriptor'
UVCCameraHandler.cpp:(.text+0x334): undefined reference to `uvc_open'
UVCCameraHandler.cpp:(.text+0x354): undefined reference to `uvc_perror'
UVCCameraHandler.cpp:(.text+0x3a8): undefined reference to `uvc_get_stream_ctrl_format_size'
UVCCameraHandler.cpp:(.text+0x3e8): undefined reference to `uvc_get_stream_ctrl_format_size'
UVCCameraHandler.cpp:(.text+0x40c): undefined reference to `uvc_print_diag'
UVCCameraHandler.cpp:(.text+0x424): undefined reference to `uvc_print_stream_ctrl'
UVCCameraHandler.cpp:(.text+0x43c): undefined reference to `uvc_perror'
UVCCameraHandler.cpp:(.text+0x46c): undefined reference to `uvc_stream_open_ctrl'
UVCCameraHandler.cpp:(.text+0x48c): undefined reference to `uvc_stream_start_iso'
UVCCameraHandler.cpp:(.text+0x4a4): undefined reference to `uvc_perror'
/tmp/ccvQZdkd.o: In function `UVCCameraHandler::grabFramesGrayscale(cv::Mat&, cv::Mat&)':
UVCCameraHandler.cpp:(.text+0x5c8): undefined reference to `uvc_stream_get_frame'
/tmp/ccvQZdkd.o: In function `UVCCameraHandler::grabFramesColor(cv::Mat&, cv::Mat&)':
UVCCameraHandler.cpp:(.text+0x864): undefined reference to `uvc_stream_get_frame'
UVCCameraHandler.cpp:(.text+0x92c): undefined reference to `cv::cvtColor(cv::_InputArray const&, cv::_OutputArray const&, int, int)'
/tmp/ccvQZdkd.o: In function `UVCCameraHandler::uvcFindDevice(uvc_context*, uvc_device**, int, int, char const*, int)':
UVCCameraHandler.cpp:(.text+0xae0): undefined reference to `uvc_get_device_list'
UVCCameraHandler.cpp:(.text+0xb10): undefined reference to `uvc_get_device_descriptor'
UVCCameraHandler.cpp:(.text+0xd0c): undefined reference to `uvc_get_device_descriptor'
/tmp/ccvQZdkd.o: In function `UVCCameraHandler::setProperties(CameraProperties)':
UVCCameraHandler.cpp:(.text+0xfb0): undefined reference to `uvc_get_gain'
UVCCameraHandler.cpp:(.text+0xff8): undefined reference to `uvc_set_gain'
UVCCameraHandler.cpp:(.text+0x103c): undefined reference to `uvc_set_ae_mode'
UVCCameraHandler.cpp:(.text+0x1050): undefined reference to `uvc_set_exposure_abs'
UVCCameraHandler.cpp:(.text+0x1068): undefined reference to `uvc_set_ae_mode'
/tmp/ccvQZdkd.o: In function `cv::String::String(char const*)':
UVCCameraHandler.cpp:(.text._ZN2cv6StringC2EPKc[_ZN2cv6StringC5EPKc]+0x60): undefined reference to `cv::String::allocate(unsigned int)'
/tmp/ccvQZdkd.o: In function `cv::String::~String()':
UVCCameraHandler.cpp:(.text._ZN2cv6StringD2Ev[_ZN2cv6StringD5Ev]+0x14): undefined reference to `cv::String::deallocate()'
/tmp/ccvQZdkd.o: In function `cv::String::operator=(cv::String const&)':
UVCCameraHandler.cpp:(.text._ZN2cv6StringaSERKS0_[_ZN2cv6StringaSERKS0_]+0x30): undefined reference to `cv::String::deallocate()'
/tmp/ccvQZdkd.o: In function `cv::Mat::Mat(cv::Size_<int>, int, void*, unsigned int)':
UVCCameraHandler.cpp:(.text._ZN2cv3MatC2ENS_5Size_IiEEiPvj[_ZN2cv3MatC5ENS_5Size_IiEEiPvj]+0x140): undefined reference to `cv::error(int, cv::String const&, char const*, char const*, int)'
UVCCameraHandler.cpp:(.text._ZN2cv3MatC2ENS_5Size_IiEEiPvj[_ZN2cv3MatC5ENS_5Size_IiEEiPvj]+0x244): undefined reference to `cv::error(int, cv::String const&, char const*, char const*, int)'
/tmp/ccvQZdkd.o: In function `cv::Mat::~Mat()':
UVCCameraHandler.cpp:(.text._ZN2cv3MatD2Ev[_ZN2cv3MatD5Ev]+0x3c): undefined reference to `cv::fastFree(void*)'
/tmp/ccvQZdkd.o: In function `cv::Mat::operator=(cv::Mat const&)':
UVCCameraHandler.cpp:(.text._ZN2cv3MataSERKS0_[_ZN2cv3MataSERKS0_]+0x140): undefined reference to `cv::Mat::copySize(cv::Mat const&)'
/tmp/ccvQZdkd.o: In function `cv::Mat::create(int, int, int)':
UVCCameraHandler.cpp:(.text._ZN2cv3Mat6createEiii[_ZN2cv3Mat6createEiii]+0xc4): undefined reference to `cv::Mat::create(int, int const*, int)'
/tmp/ccvQZdkd.o: In function `cv::Mat::release()':
UVCCameraHandler.cpp:(.text._ZN2cv3Mat7releaseEv[_ZN2cv3Mat7releaseEv]+0x68): undefined reference to `cv::Mat::deallocate()'
/tmp/ccvQZdkd.o: In function `cv::Mat::operator()(cv::Rect_<int> const&) const':
UVCCameraHandler.cpp:(.text._ZNK2cv3MatclERKNS_5Rect_IiEE[_ZNK2cv3MatclERKNS_5Rect_IiEE]+0x24): undefined reference to `cv::Mat::Mat(cv::Mat const&, cv::Rect_<int> const&)'
collect2: error: ld returned 1 exit status
So, this looks to me like g++ does not find the location of the header files, but they are installed in the correct directory!
root#Raspi_DataHarvest:~# find / | grep libuvc.h
/usr/local/include/libuvc/libuvc.h
root#Raspi_DataHarvest:~# find / | grep opencv2/opencv.hpp
/usr/local/include/opencv2/opencv.hpp
Furthermore, there's no effect using the absolute paths, like:
#include "/usr/local/include/libuvc.h"
...
Does anyone know how to solve the reference errors?
Try
g++ UVCCameraHandler.cpp -I/usr/local/include/libuvc -I/usr/local/include/opencv2 -luvc -lopencv
The most preferable
g++ UVCCameraHandler.cpp `pkg-config --libs --cflags opencv` `pkg-config --libs --cflags lubuvc`
Building a C++ program is a three-step process:
Editing the source
Compiling the source files into object files
Linking the object files into the final executable
Modern compilers often use front-end programs (like e.g. GCC with the g++ program) that combine steps 2 and 3 into a single action.
In step 2 above, the header files are included.
In step 3 you need to link with the actual libraries. You do not do this, so the linker will complain that it can't find the functions you use.
Linking with the libraries using GCC is done with the -l (lower-case L) option, listing the library name. Like for example -lopencv to link with the OpenCV library.
If the libraries are in a non-standard location (which /usr/local/lib usually is) then you need to tell the linker where to find the libraries as well. This is done with the -L option, similar to the -I option you already use to tell the compiler where to search for header-files. For example -L/usr/local/lib.
You need to link against the correct libraries (assuming your libs are in /usr/local/lib):
g++ UVCCameraHandler.cpp -I/usr/local/include/libuvc -I/usr/local/include/opencv2 -L/usr/local/lib -luvc -lopencv_core

How to link sfml 2 dynamicaly in eclipse cdt?

I've just installed Eclipse CDT and tryied to install sfml 2 in it. I seem to have a problem at linking the libs as it won't compile neither with static or dynamic linking. It just gives me these errors:
22:08:57 **** Incremental Build of configuration Debug for project sdl ****
Info: Internal Builder is used for build
g++ "-LC:\\Users\\Romeo\\Desktop\\SFML-2.0-rc\\lib" -o sdl.exe "src\\sdl.o" -lsfml-graphics-s-d -lsfml-window-s-d -lsfml-system-s-d
src\sdl.o: In function `main':
D:\_workspace\_eclipsec++\sdl\Debug/../src/sdl.cpp:5: undefined reference to `sf::VideoMode::VideoMode(unsigned int, unsigned int, unsigned int)'
D:\_workspace\_eclipsec++\sdl\Debug/../src/sdl.cpp:5: undefined reference to `sf::RenderWindow::RenderWindow(sf::VideoMode, std::string const&, unsigned int, sf::ContextSettings const&)'
D:\_workspace\_eclipsec++\sdl\Debug/../src/sdl.cpp:6: undefined reference to `sf::CircleShape::CircleShape(float, unsigned int)'
D:\_workspace\_eclipsec++\sdl\Debug/../src/sdl.cpp:7: undefined reference to `sf::Color::Green'
D:\_workspace\_eclipsec++\sdl\Debug/../src/sdl.cpp:7: undefined reference to `sf::Shape::setFillColor(sf::Color const&)'
D:\_workspace\_eclipsec++\sdl\Debug/../src/sdl.cpp:15: undefined reference to `sf::Window::close()'
D:\_workspace\_eclipsec++\sdl\Debug/../src/sdl.cpp:12: undefined reference to `sf::Window::pollEvent(sf::Event&)'
D:\_workspace\_eclipsec++\sdl\Debug/../src/sdl.cpp:18: undefined reference to `sf::Color::Color(unsigned char, unsigned char, unsigned char, unsigned char)'
D:\_workspace\_eclipsec++\sdl\Debug/../src/sdl.cpp:18: undefined reference to `sf::RenderTarget::clear(sf::Color const&)'
D:\_workspace\_eclipsec++\sdl\Debug/../src/sdl.cpp:19: undefined reference to `sf::RenderStates::Default'
D:\_workspace\_eclipsec++\sdl\Debug/../src/sdl.cpp:19: undefined reference to `sf::RenderTarget::draw(sf::Drawable const&, sf::RenderStates const&)'
D:\_workspace\_eclipsec++\sdl\Debug/../src/sdl.cpp:20: undefined reference to `sf::Window::display()'
D:\_workspace\_eclipsec++\sdl\Debug/../src/sdl.cpp:9: undefined reference to `sf::Window::isOpen() const'
D:\_workspace\_eclipsec++\sdl\Debug/../src/sdl.cpp:5: undefined reference to `sf::RenderWindow::~RenderWindow()'
D:\_workspace\_eclipsec++\sdl\Debug/../src/sdl.cpp:5: undefined reference to `sf::RenderWindow::~RenderWindow()'
D:\_workspace\_eclipsec++\sdl\Debug/../src/sdl.cpp:5: undefined reference to `sf::RenderWindow::~RenderWindow()'
src\sdl.o: In function `~CircleShape':
C:/Users/Romeo/Desktop/SFML-2.0-rc/include/SFML/Graphics/CircleShape.hpp:41: undefined reference to `vtable for sf::CircleShape'
C:/Users/Romeo/Desktop/SFML-2.0-rc/include/SFML/Graphics/CircleShape.hpp:41: undefined reference to `vtable for sf::CircleShape'
C:/Users/Romeo/Desktop/SFML-2.0-rc/include/SFML/Graphics/CircleShape.hpp:41: undefined reference to `sf::Shape::~Shape()'
collect2: ld returned 1 exit status
22:08:59 Build Finished (took 1s.419ms)
I think i'm doing something wrong but i can't figure out what. A little help?
Because your g++ is different from the compiler to build sfml. Any following combination will cause your problem:
g++ <-> cl(vc++'s compiler)
g++32 <-> g++64
g++ <-> gcc