I want to compile and run a simple c++ websocket application with g++ on windows.
Boost was installed like this:
./bootstrap.bat mingw
./b2.exe install --prefix=C:/boostLibs toolset=gcc
My c++ includes look like this:
#include <websocketpp/config/asio_no_tls.hpp>
#include <websocketpp/server.hpp>
#include <iostream>
This websocket sample was provided by https://github.com/zaphoyd/websocketpp
In order to build the project I issue this command:
g++ -Wno-deprecated -I ./cppServer/libs/ -I C:\boostLibs\include\boost-1_55 -L C:\boostLibs\lib -g ./cppServer/server.cpp -lboost_system
Which leeds me to this error message:
c:/mingw/bin/../lib/gcc/mingw32/6.3.0/../../../../mingw32/bin/ld.exe: cannot find -lboost_system
collect2.exe: error: ld returned 1 exit status
If I try to build without -lboost_system, I get a very long exception, starting with:
C:/boostLibs/include/boost-1_55/boost/system/error_code.hpp:222: undefined reference to boost::system::generic_category()'
C:/boostLibs/include/boost-1_55/boost/system/error_code.hpp:223: undefined reference toboost::system::generic_category()'
C:/boostLibs/include/boost-1_55/boost/system/error_code.hpp:224: undefined reference to boost::system::system_category()'
C:\Users\JOHANN~1.HAS\AppData\Local\Temp\ccpKMWTH.o: In functionZN5boost6system10error_codeC1Ev':
C:/boostLibs/include/boost-1_55/boost/system/error_code.hpp:323: undefined reference to boost::system::system_category()'
C:\Users\JOHANN~1.HAS\AppData\Local\Temp\ccpKMWTH.o: In functionZN5boost6system4errc20make_error_conditionENS1_6errc_tE':
C:/boostLibs/include/boost-1_55/boost/system/error_code.hpp:488: undefined reference to boost::system::generic_category()'
C:\Users\JOHANN~1.HAS\AppData\Local\Temp\ccpKMWTH.o: In functionZN5boost16thread_exceptionC2EiPKc'
So what am I missing? I can't figure it out right now.
Link to boost_system as -lboost_system-mgw63-mt-1_55, because this is what those files are called. See boost library naming for more details.
When you build boost you may like to specify --layout=system to b2.exe so that your files do not have that -mgw63-mt-1_55 in the filename and then just use -lboost_system when linking against it.
Related
I'm getting some strange compiler/linker errors when trying to use boost::shared_mutex. I'm using boost v1.61 on a VM running 32-bit rhel 6.2.
Code that causes error:
hpp file:
#include <boost/thread/shared_mutex.hpp>
class SharedData
{
public:
SharedData();
~SharedData();
void packMessage(std::shared_ptr<Message> s);
private:
// mutex that allows multiple read, single write protection
boost::shared_mutex m_sharedMutex;
};
cpp file:
void SharedData::packMessage(std::shared_ptr<Message> s)
{
// get shared read access
boost::shared_lock<boost::shared_mutex> lock(m_sharedMutex); // <- this line causes the errors
// read stuff here
}
make output:
CMakeFiles/tester.dir/__/src/SharedData/SharedData.cpp.o: In function `boost::detail::interruption_checker::interruption_checker(pthread_mutex_t*, pthread_cond_t*)':
/usr/local/include/boost/thread/pthread/thread_data.hpp:195: undefined reference to `boost::detail::get_current_thread_data()'
CMakeFiles/tester.dir/__/src/SharedData/SharedData.cpp.o: In function `boost::condition_variable::wait(boost::unique_lock<boost::mutex>&)':
/usr/local/include/boost/thread/pthread/condition_variable.hpp:81: undefined reference to `boost::this_thread::interruption_point()'
CMakeFiles/tester.dir/__/src/SharedData/SharedData.cpp.o: In function `boost::shared_mutex::lock_shared()':
/usr/local/include/boost/thread/pthread/shared_mutex.hpp:186: undefined reference to `boost::this_thread::disable_interruption::disable_interruption()'
/usr/local/include/boost/thread/pthread/shared_mutex.hpp:193: undefined reference to `boost::this_thread::disable_interruption::~disable_interruption()'
/usr/local/include/boost/thread/pthread/shared_mutex.hpp:193: undefined reference to `boost::this_thread::disable_interruption::~disable_interruption()'
collect2: error: ld returned 1 exit status
make[2]: *** [bin/tester] Error 1
Everywhere I've searched has said that these errors mean I need to link the boost_thread library, which I've done in my cmake file (boost_system is included for other code in this same project):
target_link_libraries(${BINARY_NAME} boost_thread boost_system)
But the errors persist.
Originally I was using the boost 1.41 libraries that were already installed on my machine. When I hit these errors I ran yum remove boost-devel and then manually installed boost 1.61 to see if that would correct the errors. Is there something extra I needed to add to the ./bootstrap.sh or ./b2 install commands? I can see libboost_thread.a in /usr/local/lib, so I assumed that meant the thread library was built correctly.
Any thoughts on what is causing these errors? Thanks!
Edit:
Cmake's log didn't have anything useful I could see, but make VERBOSE=1 gives the following output:
cd /home/craig/dev/myProject/build/test && /usr/bin/cmake -E cmake_link_script CMakeFiles/tester.dir/link.txt --verbose=1
/opt/rh/devtoolset-2/root/usr/bin/c++ -std=c++11 -ggdb -Wall -Werror -fprofile-arcs -ftest-coverage -fPIC -O0 -pedantic -Wl,--export-dynamic CMakeFiles/tester.dir/utilities/googletest/googletest/src/gtest-all.cc.o CMakeFiles/tester.dir/tester.cpp.o CMakeFiles/tester.dir/SharedData/testSharedData.cpp.o CMakeFiles/tester.dir/Common/testFifo.cpp.o CMakeFiles/tester.dir/Common/testCsu.cpp.o CMakeFiles/tester.dir/Messages/testMessage.cpp.o CMakeFiles/tester.dir/__/src/SharedData/SharedData.cpp.o CMakeFiles/tester.dir/__/src/Common/Fifo.cpp.o CMakeFiles/tester.dir/__/src/Common/Csu.cpp.o -o ../bin/tester -rdynamic -lboost_system -lpthread
CMakeFiles/tester.dir/__/src/SharedData/SharedData.cpp.o: In function `boost::detail::interruption_checker::interruption_checker(pthread_mutex_t*, pthread_cond_t*)':
/usr/local/include/boost/thread/pthread/thread_data.hpp:195: undefined reference to `boost::detail::get_current_thread_data()'
CMakeFiles/tester.dir/__/src/SharedData/SharedData.cpp.o: In function `boost::condition_variable::wait(boost::unique_lock<boost::mutex>&)':
/usr/local/include/boost/thread/pthread/condition_variable.hpp:81: undefined reference to `boost::this_thread::interruption_point()'
CMakeFiles/tester.dir/__/src/SharedData/SharedData.cpp.o: In function `boost::shared_mutex::lock_shared()':
/usr/local/include/boost/thread/pthread/shared_mutex.hpp:186: undefined reference to `boost::this_thread::disable_interruption::disable_interruption()'
/usr/local/include/boost/thread/pthread/shared_mutex.hpp:193: undefined reference to `boost::this_thread::disable_interruption::~disable_interruption()'
/usr/local/include/boost/thread/pthread/shared_mutex.hpp:193: undefined reference to `boost::this_thread::disable_interruption::~disable_interruption()'
Turns out my question is just like everyone else's.
#jww suggested I show the actual compile and link command invocation, not CMake's output, which I've added to my question. As you can see, the command is linking boost_system and pthread, but not boost_thread.
Digging into my project I realized that I had added boost_thread to my release build, but not into my unit test build, which is what I was trying to compile. Adding boost_thread to the unit test's CMakeLists.txt removed the error immediately.
I have installed the libprotobuf-dev=2.6.0-4 and protobuf-compiler=2.6.0-4 packages from Debian Jessie repository. Now I'm trying to compile a program that use the 'addressbook.proto' file from the Google Developers example with the MinGW-w64 compiler. I'm using Ubuntu 14.04.
With this command the program works:
$ g++ main.cpp addressbook.pb.cc -lprotobuf
But I want to compile for Windows too.
I added the symlink: /usr/include/google -> /usr/i686-w64-mingw32/include/google.
$ i686-w64-mingw32-g++ main.cpp addressbook.pb.cc -lprotobuf
/usr/bin/i686-w64-mingw32-ld: cannot find -lprotobuf
collect2: error: ld returned 1 exit status
With the library location still not working:
$ i686-w64-mingw32-g++ -L /usr/lib/i386-linux-gnu/ main.cpp addressbook.pb.cc -lprotobuf
/tmp/ccB1VJyR.o:main.cpp:(.text$_ZN6google8protobuf8internal27GetEmptyStringAlreadyInitedEv[__ZN6google8protobuf8internal27GetEmptyStringAlreadyInitedEv]+0x7): undefined reference to `google::protobuf::internal::empty_string_'
/tmp/ccB1VJyR.o:main.cpp:(.text$_ZN6google8protobuf8internal27GetEmptyStringAlreadyInitedEv[__ZN6google8protobuf8internal27GetEmptyStringAlreadyInitedEv]+0x2f): undefined reference to `google::protobuf::internal::empty_string_'
/tmp/ccPz4uiI.o:addressbook.pb.cc:(.text+0x78): undefined reference to `google::protobuf::DescriptorPool::generated_pool()'
/tmp/ccPz4uiI.o:addressbook.pb.cc:(.text+0x87): undefined reference to `google::protobuf::DescriptorPool::FindFileByName(std::string const&) const'
...
libprotobuf-dev contains library headers and pre-built binaries for your system. If you are cross-compiling you need to compile library from sources to target system as well. Something like "./configure CC=i686-w64-mingw32-g++" in library sources directory should do the job.
I am trying to use the SDL_ttf development library in an Ubuntu environment. I started by downloading the dev libraries via: sudo apt-get install libsdl-ttf2.0-dev.
Next, I imported the header file in my code as so:
#include <SDL_ttf.h>
When I compile with the command:
g++ -g -I /usr/include/SDL Main.cpp -lSDL -lSDL_image -lSDL_ttf land.cpp PerlinNoise.cpp Util.cpp org.cpp Init.cpp `sdl-config --libs
I get the following output:
/tmp/ccpLKljA.o: In function `init()':
/home/zoo/Desktop/World-A/Util.cpp:39: undefined reference to `TTF_Init'
/home/zoo/Desktop/World-A/Util.cpp:42: undefined reference to `TTF_Quit'
/home/zoo/Desktop/World-A/Util.cpp:48: undefined reference to `TTF_OpenFont'
/home/zoo/Desktop/World-A/Util.cpp:52: undefined reference to `TTF_Quit'
collect2: ld returned 1 exit status
I understand this is a linker error however I do not know what to do to fix it. I know that the -lSDL_ttf command is not doing anything because removing it does not change anything. I tried to reference the .so file however that didn't change the results. I did this reference via the command: -LlibSDL_ttf-2.0.so.0.6.3. I am able to view the .so file and it does contain the commands listed above.
You have to put land.cpp, and the rest of the CPP files, before the libraries on the command line.
I'm following this tutorial however it does not state which libaries I need to include in order to get boost to work,current options for links are:
-I/usr/include/opencv2 -I/usr/include/boost_1_55_0 -I/usr/include/boost_1_55_0/boost -O0 -g3 -Wall -c -fmessage-length=0
however this returns the following erro:
which states that it can't find asio, am I doing something wrong or was assio the wrong library to link to? Or is there any other way to find out. Note that this is my 2nd c++ project(through I have a lot of java experience) and first with the heavy use of libraries so details are somewhat required.
Removing boost/asio gave me the following errors:
make all
Building target: DisplayImage
Invoking: GCC C++ Linker
g++ -L/usr/include/opencv2 -L/usr/include/boost_1_55_0/boost -L/usr/include/boost_1_55_0 -L/usr/include/opencv2 -L/usr/lib -o "DisplayImage" ./src/Cap.o ./src/DisplayImage.o ./src/Filters.o ./src/sender.o -lopencv_imgproc -lopencv_highgui -lopencv_core
./src/sender.o: In function `__static_initialization_and_destruction_0':
/usr/include/boost_1_55_0/boost/system/error_code.hpp:222: undefined reference to `boost::system::generic_category()'
/usr/include/boost_1_55_0/boost/system/error_code.hpp:223: undefined reference to `boost::system::generic_category()'
/usr/include/boost_1_55_0/boost/system/error_code.hpp:224: undefined reference to `boost::system::system_category()'
./src/sender.o: In function `error_code':
/usr/include/boost_1_55_0/boost/system/error_code.hpp:323: undefined reference to `boost::system::system_category()'
./src/sender.o: In function `boost::asio::error::get_system_category()':
/usr/include/boost_1_55_0/boost/asio/error.hpp:224: undefined reference to `boost::system::system_category()'
collect2: ld returned 1 exit status
make: *** [DisplayImage] Error 1
Build Finished **
I use an ubuntu (x64) laptop if it matters.
Most of boost is implemented in what's called "header-only" code. Through the generous use of C++ templates, there is no actual library code to which your code needs to link. However, there are, as you've seen some actual libraries as well. Generally, the help you seek is probably here: http://www.boost.org/doc/libs/1_55_0/more/getting_started/unix-variants.html#link-your-program-to-a-boost-library
Your particular program uses the timer and system libraries and so you can probably use this command line to link your program:
g++ timer.cpp -o timer -lboost_timer -lboost_system
You can look at the bjam in boost/libs/asio/example/cpp03/tutorial/Jamfile.v2:
project
: requirements
<library>/boost/system//boost_system
<library>/boost/thread//boost_thread
<define>BOOST_ALL_NO_LIB=1
<threading>multi
<os>SOLARIS:<library>socket
<os>SOLARIS:<library>nsl
<os>NT:<define>_WIN32_WINNT=0x0501
<os>NT,<toolset>gcc:<library>ws2_32
<os>NT,<toolset>gcc:<library>mswsock
<os>NT,<toolset>gcc-cygwin:<define>__USE_W32_SOCKETS
<os>HPUX,<toolset>gcc:<define>_XOPEN_SOURCE_EXTENDED
<os>HPUX:<library>ipv6
;
You can see that they build all the tutorial steps with
-lboost_system -lboost_thread -DBOOST_ALL_NO_LIB=1
on linux
I got a serious problem compiling my C++ and OpenSSL project on my Ubuntu 11.10.
The compiling command is:
g++ -Wall -lssl -lm -lcrypto -I ./src ./src/server.cpp -o ./bin/server
I receive these errors:
server.cpp:(.text+0x8ff): undefined reference to `RSA_new'
server.cpp:(.text+0x92d): undefined reference to `PEM_read_RSAPrivateKey'
server.cpp:(.text+0xa85): undefined reference to `RSA_size'
server.cpp:(.text+0xaa1): undefined reference to `RSA_size'
server.cpp:(.text+0xae7): undefined reference to `RSA_private_decrypt'
server.cpp:(.text+0xd84): undefined reference to `BF_set_key'
server.cpp:(.text+0xf1d): undefined reference to `BF_ecb_encrypt'
server.cpp:(.text+0x13c6): undefined reference to `BF_ecb_encrypt'
collect2: ld returned 1 exit status
make: *** [server] Error 1
I successfully installed openssl and libssl-dev but the problem persists.
I tried to compile the project on Linux Mint 12 with the kernel 3.0 and I had the same problem.
On my old Linux OS with the kernel 2.6 the project compiled and worked fine (using the same Makefile and the same sources).
Please help me!
Generally you need to have the -l link flags after the code that references them. Try
g++ -Wall -I ./src ./src/server.cpp -o ./bin/server -lssl -lm -lcrypto
As the comment to this answer states, the linker only looks for undefined symbols to include in the order the parameters are listed.
That is, if your cpp file uses the libraries, the libraries have to be listed after the cpp file.
Those error are from crypto library, check whether ssl and crypto libraries are available in /usr/lib or where ever u installed if not install them and have u set the library search path for libssl and libcrypto in your compiling command?