I am trying basic C++ programs with Intel Realsense sdk2 with librealsense library on Qt Creator. My .pro file looks like the following
INCLUDEPATH += /home/magbot/opencv-3.4.8/build/include
LIBS += -L/home/magbot/opencv-3.4.8/build/lib \
-lopencv_core \
-lopencv_highgui \
-lopencv_imgcodecs \
LIBS += -L/usr/lib/x86_64-linux-gnu -lrealsense2 \
SOURCES += \
main.cpp
OpenCV libraries compile fine but the realsense library does not link. I get this error
error: cannot find -lrealsense2 . The folder /usr/lib/x86.... contains the file librealsense2.so but its in red. Please help...where am I doing it wrong
It seems that there is some error with your installation. I checked with Ubuntu 16.04 and 18.04. Both installation looks fine installed via package manager.
You should try reinstalling it. If you want to install it with package manager(apt-get) follow this
If you are installing from source code that follow this
As mention in comment by KamilCuk, you can also try to remove dead symbolic link and then create new one.
rm /usr/lib/x86.../librealsense2.so
ln -s /usr/lib/x86.../librealsense2.so.2.30 /usr/lib/x86.../librealsense2.so
Related
I am trying to build from Linux cause I decided to start using Jenkins, my personal work but, even with freetype installed: v.2.6.3, it doens't recognize this ft2build.h.
This is the QT Pro with freetype loaded. I'm now running on UBuntu 16.04:
linux {
message("Build for Linux")
DEFINES += LINUX
DEFINES += BOOST_LOG_DYN_LINK
LIBS += -lGLU
LIBS += -lfreetype
LIBS += -L/usr/lib/x86_64-linux-gnu/-libboost_timer.so -libboost_log.so -libboost_log_setup.so -libboost_system.so -libboost_thread.so -libboost_filesystem.so
}
So i tried to change also the lib pointer doing manually as:
LIBS *= -L/usr/local/lib/ -lfreetype
but still nothing going properly. The error I get is from lGLU
In file included from displays/display.cpp:3:0:
displays/./../oglft/oglft.h:50:22: fatal error: ft2build.h: No such file or directory
compilation terminated.
Makefile:1093: recipe for target 'display.o' failed
I do always run 'qmake make clean' then /usr/lib/x86_64-linux-gnu/qt5/bin/qmake && make && make check to be sure it starts properly. Can someone help me solving the bug?
I've checked where freetype lib is located by doing:
pkg-config --cflags --libs freetype2
and this is what I get
-I/usr/local/include/freetype2 -L/usr/local/lib -lfreetype
PROBLEM SOLVED!
I have had to set FREETYPE in the environment variables as BOOST too and everything is now working properly!
Here is how is mine:
export BOOST=/var/lib/jenkins/workspace/boost_1_59_0
export FREETYPE=/var/lib/jenkins/workspace/freetype-2.6.3
I preferred to move those two libs under Jenkins to avoid permissions problems.
;-)
I am trying to run a QT project on Windows that I have developed on Linux Ubuntu. Unfortunately, I cannot manage it to properly link the boost library. Here is a detailed description of the problem.
I downloaded MinGW from https://nuwen.net/mingw.html, version 13.5, such that the gcc version 5.3.0 matches the MinGW version of QT. The reason to choose this version of MinGW is that it contains the boost libraries for compression such as zlib. From the command line I compile and run my program without any problems:
g++ -std=c++11 -w -IC:/MinGW/include -LC:/MinGW/lib bAya.cpp A.o B.o C.o -o baya -lboost_iostreams -lz -lbz2
where A,B, C are my pre-compiled object files.
In QT creator I selected the MinGW compiler (C:\MinGW_53\MinGW\bin\g++.exe) and created a new default kit with the compiler.
My .pro file looks as follows:
MAKE_CXXFLAGS += -std=c++11
INCLUDEPATH += C:/MinGW_53/MinGW/include \
C:/Users/kuzk/Documents/src
LIBS += -LC:/MinGW_53/MinGW/lib/mylib \
-lboost_system \
-lboost_iostreams \
-lz \
-lbz2
greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
SOURCES += main.cpp\
mainwindow.cpp \
../src/A.cpp \
../src/B.cpp \
../src/C.cpp
HEADERS += mainwindow.h \
../src/A.h \
../src/B.h \
../src/C.h
The folder C:/MinGW_53/MinGW/lib/mylib contains my .a files such as libboost_iostreams.a
When I build it, I get many undefined reference errors such as
error: undefined reference to `boost::iostreams::zlib::default_strategy'
Interestingly, if C:/MinGW_53/MinGW/lib/mylib contains also libstdc++.a I also get linking errors to std::cout, std::ifstream etc.
I am currently stuck and I will be very helpful for any feedback.
Best,
Konstantin
Adding the library path for boost_iostreams:
-LC:/MinGW/lib \
after the line:
LIBS += -LC:/MinGW_53/MinGW/lib/mylib \
should fix it.
At the end I was able to resolve the problem. Here is what I did. I am using QT 5.7 on Windows 10.
I compiled boost using QT's console as described here: http://cpp-qt-mac-win.blogspot.co.uk/2011/10/qt-boost-for-beginners-step-by-step.html
Then I created a new project and added the paths to boost and the necessary libraries, as described in my question.
An important note. I tried to update the paths in the existing project, by running qmake and then rebuilding the project. I was getting the very same errors as I was getting with the old paths to "standard" boost. Apparently, something was cached and the changes didn't do anything. However, if I give a wrong path to a library it complained. So, QT has very confusing behavior. If someone can explain it, it will be helpful.
I have compiled qt 5.5 for static building and it works fine.
However, when I add the widgets "QT += widgets" in the pro file I get the link error "cannot find -IGL"
From what I read this is to do with the Open GL libs. I have tried the following:
sudo apt-get install libglu1-mesa-dev
and
sudo apt-get install libgl1-mesa-dev
But no luck here... I am wondering if I need a static version of this? or maybe a symlink is missing, but I can't figure out the next step :(
Edit This is the actual error message:
g++ -static -static-libgcc -static-libstdc++ -Wl,-O1 -o ../targetRel/McpSupervisor main.o cconfig.o cconfigxml.o mcpprocessbase.o rpeprocess.o supervisor.o cipcomms.o mcpsupervisor_plugin_import.o moc_mcpprocessbase.o moc_supervisor.o moc_cipcomms.o -L/usr/lib/i386-linux-gnu/mesa -L/usr/local/Qt-5.5.1/lib -lQt5Xml -lQt5Widgets -L/usr/local/Qt-5.5.1/plugins/bearer -lqconnmanbearer -lqgenericbearer -lqnmbearer -lQt5Network -L/usr/local/Qt-5.5.1/plugins/platforms -lqxcb -L/usr/local/Qt-5.5.1/plugins/xcbglintegrations -lqxcb-glx-integration -lxcb-glx -lQt5XcbQpa -lX11-xcb -lXi -lxcb-render-util -lxcb-render -lxcb -lxcb-image -lxcb-icccm -lxcb-sync -lxcb-xfixes -lxcb-shm -lxcb-randr -lxcb-shape -lxcb-keysyms -lxcb-xkb -lQt5PlatformSupport -lfontconfig -lfreetype -lQt5DBus -lXrender -lXext -lX11 -L/usr/local/Qt-5.5.1/plugins/imageformats -lqdds -lqicns -lqico -lqjp2 -lqmng -lqtga -lqtiff -lqwbmp -lqwebp -lQt5Gui -lpng -lqtharfbuzzng -lQt5Core -lz -licui18n -licuuc -licudata -lqtpcre -lm -ldl -pthread -lgthread-2.0 -lglib-2.0 -lrt -lGL -lpthread
/usr/lib/gcc/i686-linux-gnu/4.8/../../../i386-linux-gnu/libX11.a(CrGlCur.o): In function open_library':
(.text+0x33): warning: Using 'dlopen' in statically linked applications requires at runtime the shared libraries from the glibc version used for linking
/usr/bin/ld: cannot find -lGL
/usr/local/Qt-5.5.1/plugins/imageformats/libqjp2.a(jas_stream.o): In functionjas_stream_tmpfile':
jas_stream.c:(.text+0x7a4): warning: the use of tmpnam' is dangerous, better usemkstemp'
/usr/local/Qt-5.5.1/lib/libQt5Core.a(qfilesystemengine_unix.o): In function QFileSystemEngine::resolveGroupName(unsigned int)':
qfilesystemengine_unix.cpp:(.text+0x943): warning: Using 'getgrgid_r' in statically linked applications requires at runtime the shared libraries from the glibc version used for linking
/usr/lib/gcc/i686-linux-gnu/4.8/../../../i386-linux-gnu/libglib-2.0.a(libglib_2_0_la-gutils.o): In functiong_get_user_database_entry':
(.text+0x25a): warning: Using 'getpwuid' in statically linked applications requires at runtime the shared libraries from the glibc version used for linking
/usr/lib/gcc/i686-linux-gnu/4.8/../../../i386-linux-gnu/libglib-2.0.a(libglib_2_0_la-gutils.o): In function g_get_user_database_entry':
(.text+0xa3): warning: Using 'getpwnam_r' in statically linked applications requires at runtime the shared libraries from the glibc version used for linking
/usr/local/Qt-5.5.1/lib/libQt5Core.a(qfilesystemengine_unix.o): In functionQFileSystemEngine::resolveUserName(unsigned int)':
qfilesystemengine_unix.cpp:(.text+0x592): warning: Using 'getpwuid_r' in statically linked applications requires at runtime the shared libraries from the glibc version used for linking
/usr/local/Qt-5.5.1/lib/libQt5Network.a(qhostinfo_unix.o): In function `QHostInfoAgent::fromName(QString const&)':
qhostinfo_unix.cpp:(.text+0x580): warning: Using 'getaddrinfo' in statically linked applications requires at runtime the shared libraries from the glibc version used for linking
collect2: error: ld returned 1 exit status
make: *** [../targetRel/McpSupervisor] Error 1
09:49:17: The process "/usr/bin/make" exited with code 2.
Error while building/deploying project qtMain (kit: Qt 5.5.1 GCC 32bit Static)
When executing step "Make"
09:49:17: Elapsed time: 00:08.
What is your actual problem :
You have unmet dependencies .
You are thinking that you have all the required dependencies because you installed
sudo apt-get install libglu1-mesa-dev
sudo apt-get install libgl1-mesa-dev
The problem is that you have a i386 system that is x32 system.
But you have installed development files for x64 systems using the commands above
Here is the ANSWER :
Intsall the following things
sudo apt-get install libgl1-mesa-dev:i386
sudo apt-get install libglu1-mesa-dev:i386
Now it should work ;)
Some other helpful stuff for visitors to this particular question
The lines below were my attempt to solve the problem but they did not work because the person who asked the question has a x32 system but the comments below work for x64 systems . But never the less the meta answer below will serve well for people who have the same problem and x64 systems. And also it will help problem to understand what are the basic steps to do after a similar problem occurs
# code_fodder I wanted to ask a question by making a comment below your question but I do not have 50 reputations to do so.
So I have to use the answer submission form to do so. :(
Do you have Miscellaneous Mesa GL utilities ?
If you dont have them then install using
sudo apt-get install mesa-utils
If you want to use OpenGl ES then you have to install Miscellaneous Mesa utilies (opengles, egl) using
sudo apt-get install mesa-utils-extra
Let me know if that works .
POSTING NEW INFORMATION ON 17-DEC-2015
I will post a portion of my project.pro file here . It specifically contains the library linking methods that I used for a simple OpenGL project.
I am using GLEW with OpenGL and SDL2
TEMPLATE = app
CONFIG += console
CONFIG -= app_bundle
CONFIG -= qt
SOURCES += main.cpp \
mesh.cpp \
display.cpp \
shader.cpp
HEADERS += \
mesh.h \
display.h\
shader.h
unix|win32: LIBS += -lGL \
-lGLEW \
/usr/local/lib/libSDL2-2.0.so
As you can notice I am using both static and dynamically linked libraries.
You may need to add:
unix | win32: LIBS += -L/usr/lib/x86_64-linux-gnu/mesa/ to your .pro file. However the path may be different for 32 bit systems. In that folder there are is the required mesa library files. These are the files for my system.
zehel#zehel-PC:/usr/lib/x86_64-linux-gnu/mesa$ ls
ld.so.conf libGL.so libGL.so.1 libGL.so.1.2.0
Try compiling now and see if that works
If that doesn't then either you have unmet dependencies or you are using old OpenGL.
Now after running the sudo apt-get install mesa-utils you will be able to use a command called glxinfo . It will show you all required information about your graphics card.
Run glxinfo | grep "OpenGl version string"
It will show you what version of OpenGl and mesa you have
mine is like this
OpenGL version string: 3.0 Mesa 10.3.2
If they are less than 3.0 then you are not using modern OpenGL and you may want to update your graphics drivers.
But if they are 3.0 or above then you are probably okay.
I cant reproduce your problem so I think that you have missing dependencies
See this posts on the QT forum where people with same problem as you are saying that there problems were fixed after installing the dependencies
http://forum.qt.io/topic/36282/solved-qt-5-2-0-and-lgl-issue
The last answer in the qt forum is quite good please refer it.
Update me whether it works or not .
Hope That helps .
You might need to specify the path where the GL library can be found, for exmaple by using the -L option to GCC, which has the following man page description:
-Ldir
Add directory dir to the list of directories to be searched for -l.
I'm trying to use the Sha512 function in openSSL but can't seem to get it to work as I get compiler errors just starting into the code. I include #include <openssl/sha.h> at the top of the .cpp file, then in the action of a button event I put just the following code below.
SHA512_CTX ctx;
SHA512_Init(&ctx);
//Will uncomment below in later if I get SHA512_Init to work
//SHA512_Update(&ctx, string, strlen(string));
//SHA512_Final(digest, &ctx);
I get a linker error telling my undefined symbols for architecture x86_64, implying the function does not exist?
I'm aware QT 5 has a hash function, but I'm limited to QT 4.8 so I can not use the cryptographic sha512 hash function available in the QT 5+ framework.
Any help is appreciated!
Used macports to install openssl
I'm using Mac OS 10.9.2
MAKE FILE
#-------------------------------------------------
#
# Project created by QtCreator 2014-06-11T20:27:49
#
#-------------------------------------------------
QT += core gui network
greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
TARGET = ExchangeTab
TEMPLATE = app
LIBS += -L/usr/include/openssl -openssl
INCLUDEPATH += /usr/include/openssl
SOURCES += main.cpp\
mainwindow.cpp \
httpsocket.cpp \
cloaksend.cpp \
exchange.cpp
HEADERS += mainwindow.h \
httpsocket.h \
cloaksend.h \
exchange.h
FORMS += mainwindow.ui
RESOURCES += \
AppResources.qrc
Looking for cross platform solution please.
You need to link to the right library (openSSL)
Have a look here: How to Include OpenSSL in a Qt project
Specifically, add this to your .pro file.:
LIBS += -L/opt/local/lib/ -lcrypto
For including .h files add this line to your .pro file :
INCLUDEPATH += /opt/local/include
[1] says that the default include path will be /opt/local/include/.
LIBS += -L/usr/include/openssl -openssl
INCLUDEPATH += /usr/include/openssl
This looks incorrect. The OpenSSL libraries are libcrypto (-lcrypto) and libssl (-lssl). There is nolibopenssl(-lopenssl). Try:
LIBS += -L/usr/lib -lcrypto
INCLUDEPATH += /usr/include/openssl
But the libraries are version 0.9.8. You might consider upgrading to 1.0.1h.
$ ls /usr/lib | grep crypto
libcrypto.0.9.7.dylib
libcrypto.0.9.8.dylib
libcrypto.dylib
libk5crypto.dylib
And
$ /usr/bin/openssl version
OpenSSL 0.9.8y 5 Feb 2013
If you choose to upgrade, OpenSSL will install into /usr/local/ssl. Avoid mixing/matching version of OpenSSL with the following.
INCLUDEPATH += /usr/local/ssl/include/openssl
LIBS += /usr/local/ssl/lib/libcrypto.a
Its OK to specify objects and archives in LIBS. See How to add object files to a project in Qt.
Okay so I may have answered my own question but I will need some help understanding why it worked.
My make file was indeed the problem. I added the following 3 lines.
INCLUDEPATH += $$OPENSSL_INCLUDE_PATH
LIBS += $$join(OPENSSL_LIB_PATH,,-L,)
LIBS += -lcrypto
Then it magically compiled just fine. I found these in another project made with QT that compiled for OpenSSL.
Interestingly enough. I removed the top two lines so only the following remained. Then ran the clean on my project to be sure the code was being recompiled.
LIBS += -lcrypto
This also just 'worked' without linker errors. It looks like that is the only command I need. Question is... will that be cross platform friendly if I take this code and compile on linux or windows? That I am not sure, but this worked.
I would like to use boost/filesystem.hpp in my Qt app but the builder keeps saying:
Library not loaded: libboost_filesystem.dylib
Reason: image not found
here is how I try to link it:
INCLUDEPATH+= /installdir/boost_1_50_0
LIBS += -L/installdir/boost_1_50_0/stage/lib -lboost_filesystem
I've tried linking directly, too. I've also tried rebuilding boost according to jschoen's answer, no difference.
Im running a MacOSX Lion. How do I have to link boost properly?
In the meantime I have found a solution.
install boost with macports (sudo port install boost) Thanks to dies and Tim Cooper.
then link against:
INCLUDEPATH += /opt/local/include
LIBS += -L/opt/local/lib
LIBS += -lboost_system-mt -lboost_filesystem-mt