[QPID-7814] Can't Compile "Hello World" example with g++, but can compile with clang++

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Not A Bug
• Affects Version/s: qpid-cpp-1.36.0
• Component/s: C++ Client
• Labels: build

Environment

Ubuntu 16.04 Docker Image

• Assignee: Justin Ross
• Reporter: Matt Singman
• Created: 07/Jun/17 13:25
• Updated: 21/Oct/18 22:05
• Resolved: 21/Oct/18 22:05

Description

The example hello_world.cpp program does not compile when using g++ in my Ubuntu 16.04 Docker image, but does when using clang+. I attempted to compile it with g+ 5.4.0, g++ 4.9 and g++ 4.8 but I get the same error for each. The command entered was "g++ -lqpidtypes -lqpidmessaging helloWorld.cpp". When using clang++ 3.8.0 with the command "clang++ -lqpidtypes -lqpidmessaging helloWorld.cpp" the code compiles.

I am pretty sure that it is able to find the libraries because when I do something like "g++ -lqpidtypes -lqpidmessagin helloWorld.cpp" (note the missing g on messaging) it says "/usr/bin/ld: cannot find -lqpidmessagin". When the libraries are typed correctly I get the following:

/tmp/ccNPg3lI.o: In function `main':
helloWorld.cpp.text+0xba): undefined reference to `qpid::messaging::Connection::Connection(std::string const&, std::string const&)'
helloWorld.cpp.text+0xc9): undefined reference to `qpid::messaging::Connection::open()'
helloWorld.cpp.text+0xf8): undefined reference to `qpid::messaging::Connection::createSession(std::string const&)'
helloWorld.cpp.text+0x127): undefined reference to `qpid::messaging::Session::createReceiver(std::string const&)'
helloWorld.cpp.text+0x144): undefined reference to `qpid::messaging::Session::createSender(std::string const&)'
helloWorld.cpp.text+0x163): undefined reference to `qpid::messaging::Message::Message(std::string const&)'
helloWorld.cpp.text+0x180): undefined reference to `qpid::types::Variant::Variant(char const*)'
helloWorld.cpp.text+0x193): undefined reference to `qpid::messaging::Message::setContentObject(qpid::types::Variant const&)'
helloWorld.cpp.text+0x19f): undefined reference to `qpid::types::Variant::~Variant()'
helloWorld.cpp.text+0x1cc): undefined reference to `qpid::messaging::Message::getContentObject()'
helloWorld.cpp.text+0x1db): undefined reference to `qpid::types::Variant::setEncoding(std::string const&)'
helloWorld.cpp.text+0x20b): undefined reference to `qpid::messaging::Sender::send(qpid::messaging::Message const&, bool)'
helloWorld.cpp.text+0x215): undefined reference to `qpid::messaging::Duration::SECOND'
helloWorld.cpp.text+0x21a): undefined reference to `qpid::messaging::operator*(qpid::messaging::Duration const&, unsigned long)'
helloWorld.cpp.text+0x233): undefined reference to `qpid::messaging::Receiver::fetch(qpid::messaging::Duration)'
helloWorld.cpp.text+0x246): undefined reference to `qpid::messaging::Message::operator=(qpid::messaging::Message const&)'
helloWorld.cpp.text+0x252): undefined reference to `qpid::messaging::Message::~Message()'
helloWorld.cpp.text+0x265): undefined reference to `qpid::messaging::Message::getContent() const'
helloWorld.cpp.text+0x2a3): undefined reference to `qpid::messaging::Session::acknowledge(bool)'
helloWorld.cpp.text+0x2b2): undefined reference to `qpid::messaging::Connection::close()'
helloWorld.cpp.text+0x2c3): undefined reference to `qpid::messaging::Message::~Message()'
helloWorld.cpp.text+0x2cf): undefined reference to `qpid::messaging::Sender::~Sender()'
helloWorld.cpp.text+0x2de): undefined reference to `qpid::messaging::Receiver::~Receiver()'
helloWorld.cpp.text+0x2ed): undefined reference to `qpid::messaging::Session::~Session()'
helloWorld.cpp.text+0x2fc): undefined reference to `qpid::messaging::Connection::~Connection()'
helloWorld.cpp.text+0x3a1): undefined reference to `qpid::messaging::Session::~Session()'
helloWorld.cpp.text+0x3cf): undefined reference to `qpid::messaging::Message::~Message()'
helloWorld.cpp.text+0x3e3): undefined reference to `qpid::types::Variant::~Variant()'
helloWorld.cpp.text+0x41f): undefined reference to `qpid::messaging::Message::~Message()'
helloWorld.cpp.text+0x447): undefined reference to `qpid::messaging::Message::~Message()'
helloWorld.cpp.text+0x45b): undefined reference to `qpid::messaging::Sender::~Sender()'
helloWorld.cpp.text+0x472): undefined reference to `qpid::messaging::Receiver::~Receiver()'
helloWorld.cpp.text+0x489): undefined reference to `qpid::messaging::Session::~Session()'
helloWorld.cpp.text+0x4a0): undefined reference to `qpid::messaging::Connection::~Connection()'
collect2: error: ld returned 1 exit status

Note that I was able to compile the same code using g++ 4.8.5 on CentOS 7 and it runs as expected.