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
Related
I tried to link against Vulkan with:
LIBS += -L$$(VK_SDK_PATH)/Bin -lvulkan-1 # Doesn't work at all
LIBS += -L$$(VK_SDK_PATH)/Lib -lvulkan-1 # Works with MSVC
But I couldn't get it linking with MinGW.
INSTALLED:
VulkanSDK (1.2.148.1)
Qt (5.15.0; MSYS2)
MinGW (10.2.0; MSYS2)
I installed the Vulkan Runtime and retried
LIBS += -L$$(VK_SDK_PATH)/Lib -lvulkan-1
with MinGW again and it works. Nevertheless, thank you for helping me out.
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
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 currently run Arch Linux on my laptop and was hoping to know why Qt Creator isn't finding my glut library (which exists on my system).
My setup qmake file looks as follows:
...
/*sources and headers above*/
QT += opengl
LIBS += -lfreeglut
INCLUDEPATH += -L/usr/lib/
And when I run a locate glut, I get the following:
/usr/include/kwinglutils.h
/usr/include/kwinglutils_funcs.h
/usr/include/GL/freeglut.h
/usr/include/GL/freeglut_ext.h
/usr/include/GL/freeglut_std.h
/usr/include/GL/glut.h
/usr/lib/libglut.a
/usr/lib/libglut.so
/usr/lib/libglut.so.3
/usr/lib/libglut.so.3.9.0
/usr/share/avogadro/fragments/amino_acids/D-glutamic_acid.cml
/usr/share/avogadro/fragments/amino_acids/D-glutamine.cml
/usr/share/avogadro/fragments/amino_acids/L-glutamic_acid.cml
/usr/share/avogadro/fragments/amino_acids/L-glutamine.cml
/usr/share/licenses/freeglut
/usr/share/licenses/freeglut/LICENSE
/var/lib/pacman/local/freeglut-2.6.0-1
/var/lib/pacman/local/freeglut-2.6.0-1/changelog
/var/lib/pacman/local/freeglut-2.6.0-1/desc
/var/lib/pacman/local/freeglut-2.6.0-1/files
Note that I have tried -lglut32 in my qmake file as well.
What could I be missing here?
When you specify -lfoobar in your .pro file (or with gcc in general), you're directing the compiler to search for the library libfoobar.a. Judging from your locate output it looks like you want:
LIBS += -lglut
Oh, silly me. I just realized that the correct lib to add was just -lglut and not -lglut32. This is because there exists libglut.so, and not libglut32.so.