I'm currently trying to use the "QSerialPort" library on a Virtual Machine with Debian on it and can't seem to make it work. It looks like the Library straight up doesn't exist on my machine. It doesn't auto-complete when I write it out and when I try compiling I get this.
/home/debian/Downloads/mainmenu.h:15: error: QSerialPort: No such file or directory
#include <QSerialPort>
^
So I'm pretty sure I just don't have the library. Even though my version of Qt is said to have it.
-Qt Creator 4.2.0
-Based on Qt 5.7.1 (GCC 6.3.0 20170415, 64 bit)
I even have an older version of Qt creator on my Windows OS and it has the library.
I was told to get the library myself by doing this:
git clone git://code.qt.io/qt/qtserialport.git
mkdir qtserialport-build
cd qtserialport-build
qmake ../qtserialport/qtserialport.pro
sudo make install
but I can't even get through the first line before getting this:
git clone git://code.qt.io/qt/qtserialport.git
Cloning into 'qtserialport'...
fatal: unable to connect to code.qt.io:
Also tried to install the Package: libqt5serialport5 (5.2.1-1)
and it pretty much changed nothing.
You need to download and install. Just follow my instructions given below, it will help you to fix the problem.
You are very close man (Also tried to install the Package: libqt5serialport5 (5.2.1-1))
1) You have to install (via Terminal):
sudo apt-get install libqt5serialport5
sudo apt-get install libqt5serialport5-dev
2) add in the .pro file
QT += core serialport
3) int the .h file add:
#include <QtSerialPort/QSerialPort>
#include <QtSerialPort/QSerialPortInfo>
4) Example Device Info
serial -> setPortName("/dev/ttyACM3"); // just example for my device
serial -> setBaudRate(QSerialPort::Baud115200);
serial -> setDataBits(QSerialPort::Data8);
serial -> setParity(QSerialPort::NoParity);
serial -> setStopBits(QSerialPort::OneStop);
serial -> setFlowControl(QSerialPort::NoFlowControl);
serial -> open(QIODevice::ReadWrite);
It is probably the best option.
Alright! I figured it out.
First problem, was accessing a git library through a Firewall/Virtual Machine.
So instead of using the git link:
git://code.qt.io/qt-creator/qt-creator.git
I used the http link, which worked:
http://code.qt.io/qt-creator/qt-creator.git
Still had some issues until I followed these steps(I didn't download the dev version of the package, I guess):
1)
sudo apt-get install libqt5serialport5
sudo apt-get install libqt5serialport5-dev
2) add in the .pro file
QT += serialport
3) int the .h file add:
#include <QtSerialPort/QSerialPort>
Related
I have a problem using Paho MQTT client in C.
I downloaded the pre built binaries for my system (Windows 10 64) from their projects page. I unpacked the zip file to a folder in the documents folder, where I also created a .c file with the example at the bottom of the Paho product page. My editor is atom and my compiler is gcc.
When I tried to compile it in Atom, I got this error:
undefined reference to MQTTClient_create'
So I went searching and found plenty of topics, but I still couldn't figure out, how to resolve this issue. From this stackoverflow topic I gather that it's a linker problem and that I need to link the files during compile, so here's what I tried:
gcc MQTT.c -L "C:\Users\Pete\Documents\MQTT on C\Examples\Paho\lib" -l paho-mqtt3c
Which still gives me the same undefined reference error. When I try to link to the dll of the same name, the compiler does not find the file.
Can anyone point me in the right direction, please?
Any help is appreciated!
I'd be interested to know if you have registered the Paho MQTT dll in Windows?
You should have paho-mqtt3c.dll as part of the download.
I don't know if this will work for you, but I have the same issue (undefined reference to MQTTClient_create)...
Copy the dll file into c:/windows/system32
Run CMD Prompt as Administrator and type:
regsvr32 i/ paho-mqtt3c.dll
Worth a try.
The problem was that I was compiling the program with the 32-bit gcc compiler for the 64-bit library. Installing and using MinGW64 worked.
I had the same issue in OS X. This is how I resolved it
I compiled the paho-mqtt library in Linux/EC2 instance.
Installed all the dependencies:
sudo yum install install build-essential gcc make cmake cmake-gui cmake-curses-gui
sudo yum install cmake
sudo yum install doxygen graphviz
cmake -DPAHO_WITH_SSL=TRUE -DPAHO_BUILD_DOCUMENTATION=FALSE -DPAHO_BUILD_STATIC=TRUE -DPAHO_BUILD_SHARED=FALSE -DPAHO_MQTT_C_PATH=../paho.mqtt.c/ -DPAHO_MQTT_C_LIB=../paho.mqtt.c/src/libpaho.mqtt3as-static.a
make
make html
make install
LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/home/ec2-user/paho.mqtt.c/src
export LD_LIBRARY_PATH=$LD_LIBRARY_PATH
sudo ldconfig
gcc test1.c -o test1 -lpaho-mqtt3c
Compiled successfully..
./test1
This solution works for OS X as well. Replace step 2 with
brew install cmake doxygen openssl-devel
I am totally new to swift. It has just been released as open source for linux and I wanted to try it. This is on ubuntu 14.04. clang is installed as per prerequisites.
<Edit>: requirements here request clang version 3.6 also on ubuntu 14.04. I had first tried these first steps with clang 3.4, but have since updated to 3.6 following the instructions in the link and retried. Same result.</Edit>
I have downloaded https://swift.org/builds/ubuntu1404/swift-2.2-SNAPSHOT-2015-12-01-b/swift-2.2-SNAPSHOT-2015-12-01-b-ubuntu14.04.tar.gz to ~/Downloads/. Transcript of installation and first step in swift:
$ cd /tmp
$ tar xf ~/Downloads/swift-2.2-SNAPSHOT-2015-12-01-b-ubuntu14.04.tar.gz
$ PATH=/tmp/swift-2.2-SNAPSHOT-2015-12-01-b-ubuntu14.04/usr/bin/:"$PATH"
$ clang++ --version
Ubuntu clang version 3.6.0-2ubuntu1~trusty1 (tags/RELEASE_360/final) (based on LLVM 3.6.0)
Target: x86_64-pc-linux-gnu
Thread model: posix
$ which swift
/tmp/swift-2.2-SNAPSHOT-2015-12-01-b-ubuntu14.04/usr/bin//swift
$ swift --version
Swift version 2.2-dev (LLVM 46be9ff861, Clang 4deb154edc, Swift 778f82939c)
Target: x86_64-unknown-linux-gnu
$ swift
Welcome to Swift version 2.2-dev (LLVM 46be9ff861, Clang 4deb154edc, Swift 778f82939c). Type :help for assistance.
1> 1 + 2
opening import file for module 'SwiftShims': No such file or directory
1>
According to this getting started guide it should have printed instead
$R0: Int = 3
What's wrong and how can I fix it?
Edit: Trying to find that file manually: It is apparently not contained in the installation:
$ find swift-2.2-SNAPSHOT-2015-12-01-b-ubuntu14.04/ | grep -i shims
swift-2.2-SNAPSHOT-2015-12-01-b-ubuntu14.04/usr/lib/swift/shims
swift-2.2-SNAPSHOT-2015-12-01-b-ubuntu14.04/usr/lib/swift/shims/FoundationShims.h
swift-2.2-SNAPSHOT-2015-12-01-b-ubuntu14.04/usr/lib/swift/shims/SwiftStddef.h
swift-2.2-SNAPSHOT-2015-12-01-b-ubuntu14.04/usr/lib/swift/shims/module.map
swift-2.2-SNAPSHOT-2015-12-01-b-ubuntu14.04/usr/lib/swift/shims/UnicodeShims.h
swift-2.2-SNAPSHOT-2015-12-01-b-ubuntu14.04/usr/lib/swift/shims/GlobalObjects.h
swift-2.2-SNAPSHOT-2015-12-01-b-ubuntu14.04/usr/lib/swift/shims/HeapObject.h
swift-2.2-SNAPSHOT-2015-12-01-b-ubuntu14.04/usr/lib/swift/shims/RuntimeShims.h
swift-2.2-SNAPSHOT-2015-12-01-b-ubuntu14.04/usr/lib/swift/shims/RefCount.h
swift-2.2-SNAPSHOT-2015-12-01-b-ubuntu14.04/usr/lib/swift/shims/RuntimeStubs.h
swift-2.2-SNAPSHOT-2015-12-01-b-ubuntu14.04/usr/lib/swift/shims/LibcShims.h
swift-2.2-SNAPSHOT-2015-12-01-b-ubuntu14.04/usr/lib/swift/shims/CoreFoundationShims.h
swift-2.2-SNAPSHOT-2015-12-01-b-ubuntu14.04/usr/lib/swift/shims/SwiftStdint.h
Edit: When I try the swift build helloworld example, this output is produced:
/tmp/Hello$ swift build
<unknown>:0: error: opening import file for module 'Swift': No such file or directory
swift-build: exit(1): ["/tmp/swift-2.2-SNAPSHOT-2015-12-01-b-ubuntu14.04/usr/bin/swiftc", "--driver-mode=swift", "-I", "/tmp/swift-2.2-SNAPSHOT-2015-12-01-b-ubuntu14.04/usr/lib/swift/pm", "-L", "/tmp/swift-2.2-SNAPSHOT-2015-12-01-b-ubuntu14.04/usr/lib/swift/pm", "-lPackageDescription", "/tmp/Hello/Package.swift"]
Edit: new findings up to 2015-12-22
Since I posted this question, at least two more snapshots of swift for linux have been released: 2015-12-10 and 2015-12-18. I have tried these, but they do not fix the issue.
This mailing list thread here (post 1, post 2, post 3) is about the same problem. It was suggested there that installation of swift under the home directory would help. It did not help in my case, the error message is still the same.
More interestingly, that mailing list thread contains an analysis of the REPL error created with strace. It would be interesting to compare that particular strace output with the strace output from a system where REPL works.
Edit: More info up to 2015-12-26:
A new swift release is out, dated 2015-12-22. This release exhibits the same problem.
Another thread concerning this problem has appeared on the swift mailing list starting here. The user experiencing the problem has also posted strace output here.
I had the exact same problem. It turns out that I had added the ppa:ubuntu-toolchain-r/test repo in order to install g++-4.9 on my Mint distro (17.2). Once I purged the repository and restored various libraries to their original versions, swift finally worked for me.
Specifically, I had to run
sudo apt-get install ppa-purge
sudo ppa-purge -d trusty ppa:ubuntu-toolchain-r/test
While cleaning up, ppa-purge was complaining that in order to resolve conflicts, it would have to remove quite a few packages it could not find in the Ubuntu Trusty repo (including really core ones like build-essential, xorg, gcc, x11-xserver-utils...), so I made a note and reinstalled these right away after the purge. Just be very careful.
I think some of the libraries overridden when installing g++ 4.9 were creating a conflict. I've verified all this on a fresh Mint install too.
This is not really an answer -- I have the same problem as OP -- but SwiftShims is actually defined the module.map file in your file listing above:
module SwiftShims {
header "CoreFoundationShims.h"
header "FoundationShims.h"
header "GlobalObjects.h"
header "HeapObject.h"
header "LibcShims.h"
header "RefCount.h"
header "RuntimeShims.h"
header "RuntimeStubs.h"
header "SwiftStddef.h"
header "SwiftStdint.h"
header "UnicodeShims.h"
export *
}
https://github.com/apple/swift/blob/8d9ef80304d7b36e13619ea50e6e76f3ec9221ba/stdlib/public/SwiftShims/module.map
I repeated the same steps as you described on a brand-new Ubuntu 14.04 Azure VM and got the expected
$R0: Int = 3
Interestingly, it worked fine even without Clang or GCC! Later I installed Clang-3.5, and it worked as well.
Is it possible that they have sneaked in a new tarball with the same name? The MD5 hash of the one I got is here:
user#ubuntu1:/tmp/junk$ md5sum swift-2.2-SNAPSHOT-2015-12-01-b-ubuntu14.04.tar.gz
a93f52921c491b747cad256904c8742f swift-2.2-SNAPSHOT-2015-12-01-b-ubuntu14.04.tar.gz
Does yours match? If so, you may want to try a different installation of Ubuntu 14.04 if you have access to one.
I have also been able to successfully use swift build as instructed in https://swift.org/getting-started/#using-the-build-system . Removing the clang-3.5 package broke swift build, just as I had suspected, but REPL swift still worked as it did originally, before installing Clang for the first time. Then I installed Clang-3.4, and swift build was back in business.
Update 1/3/2016:
Using the hints from the various comments on this question, I've been able to reproduce the error on my Ubuntu 14.04 Azure VM. As an alternative solution, the problem can also be addressed by manipulating $LD_LIBRARY_PATH, see Unable to compile "hello world" program with Swift on Ubuntu 14.04.
Had the same issue, what I missed was that I didn't get the keys for the package and verify it before extracting.
Download the package
wget -q -O - https://swift.org/keys/all-keys.asc | gpg --import
gpg --keyserver hkp://pool.sks-keyservers.net --refresh-keys Swift
gpg --verify swift-2.2-SNAPSHOT-2015-12-01-b-ubuntu14.04.tar.gz.sig
tar xzf swift-2.2-SNAPSHOT-2015-12-01-b-ubuntu14.04.tar.gz
add PATH=/path/to/usr/bin:"${PATH}" to your .bashrc
finally run swift
You should see:
Welcome to Swift version 2.2-dev (LLVM 46be9ff861, Clang 4deb154edc, Swift 778f82939c). Type :help for assistance.
1> 1+1
$R0: Int = 2
Following the advice of James D, I tried to run
sudo apt-get install ppa-purge
sudo ppa-purge -d trusty ppa:ubuntu-toolchain-r/test
However, this did not work. What's strange, is that what did work doesn't make sense. For me, I got it working by installing the above ppa first and then purging it. The whole command set that got me working was
sudo add-apt-repository ppa:ubuntu-toolchain-r/test
sudo apt-get update
sudo apt-get install g++-4.9 # This step may be optional
sudo apt-get install ppa-purge
sudo ppa-purge -d trusty ppa:ubuntu-toolchain-r/test
my problem is the following :
In order to build some specific library I have to install GCC on a red hat without access to Internet and no way to use yum.
For now I did :
1)I installed gcc-x86_64-linux-gnu (and it's dependencies)
2) I created symbolic links in /usr/bin for the following installed executables : /usr/bin/x86_64-linux-gnu-cpp, /usr/bin/x86_64-linux-gnu-gcc, /usr/bin/x86_64-linux-gnu-gcov
using sudo ln -s /usr/bin/x86_64-linux-gnu-<end> <end>
So I have functional gcc cpp and gcov command.
3) I tested a ./configure on my library to build and get GCC saying that the C compiler isn't able to create C executable. I so tested to create a simple hello world C program.
#include<stdio.h>
int main(void){
printf("hello world!\n");
return 0;
}
when running gcc ./hello.c -o helloI got the this error : "fatal error : stdio.h : no such file or directory".
4) I did a ls /usr/include | grep .h but found nothing. Conclusion : standard C libs aren't installed.
5) I so installed glibc-devel to import the standard C library, and now the same command show numerous C files, including the stdio.h file.
But my GCC still raising the same fatal error.
Any idea about what should I do make to make it work ?
I don't think the problem here is related to x86 / x64 problem as it is suggested in this question
From your post i assume that this is related to improper installation, before installing a package make sure you use the proper package to the proper distribution as compatibility issues may arise with 32 Bit or 64 Bit OS package. You could try the below method by using a Red Hat Boot CD.
Install rpm from CDROM/DVD
Mount your RHEL Linux CD/DVD and install the following packages using rpm command:
$rpm -ivh gcc*
i dont have internet connection, so i installed gcc on my linux system manually through its debian package. but i am not able to compile any c code.
here is my sample c code.
#include <stdio.h>
main()
{
printf("Hellp world");
return 0;
}
the error that it shows:
ocpe#blrkec241972d:~$ gcc -o hello hello.c
hello.c:1:19: error: stdio.h: No such file or directory
hello.c: In function âmainâ:
hello.c:4: warning: incompatible implicit declaration of built-in function âprintfâ
I think i have not installed all the dependencies of compiler. Plz suggest me descriptive way to install it correctly..
Assuming by "installed manually", you mean "using dpkg -i", then you need to also install libc6-dev. I suggest further installing, at very minimum, build-essential and everything it depends on.
Debian actually has a few programs to help with offline package installation. One option is of course to use CD/DVD images. Another is to use something like apt-offline.
On my Debian system, the header files are in another package libc6-dev. You're probably missing that (and some others as well, I would guess).
What about this gcc -Wall hello.c -o hello -I/usr/include/stdio.h?
You can see your include search path by using:
echo | gcc -v -x c -E -
On my Ubuntu Linux machine i can see this output for the previous command:
#include \"...\" search starts here:
/usr/lib/gcc/i686-linux-gnu/4.6.1/include
/usr/local/include
/usr/lib/gcc/i686-linux-gnu/4.6.1/include-fixed
/usr/include/i386-linux-gnu
/usr/include
EDIT :
Install build-essential
Download from here : http://packages.debian.org/squeeze/i386/build-essential/download (assume you are 32 bits), and install dowloaded package like this:
dpkg -i build-essential.deb
I'm not a linux expert, and I'm trying to install a 2D graphics library on Ubuntu 10.10. I need to make a 2D display and after a little online research, GooCanvas seems like it will fit the bill.
I'm frustrated because it simply won't install and I don't get what I am supposed to do.
Here's what I did.
1> git clone git://git.gnome.org/goocanvas #built a goocanvas directory
2> cd goocanvas
3> ls
AUTHORS ChangeLog demo goocanvas.doap NEWS src
autogen.sh configure.in docs MAINTAINERS po TODO
autom4te.cache COPYING goocanvas-2.0.pc.in Makefile.am README
4> less README #here's what it says
To build it run './configure' and 'make'. To run the demo cd into 'demo' and
run './demo'. (Or run ./simple-demo for the very simple demo, or ./mv-demo
for the model-view demo.)
5> ./configure # error: bash: ./configure: No such file or directory
6> find . -name "configure*" -print #there aren't any other configure scripts?
'make; and 'make install' don't work either.
OK, I'm frustrated. Why does it say run configure if there isn't one? How do I install this thing?
Does anyone know an easy to use graphics library for ubuntu that will actually work. and can be easily installed?
Cairo, which is usually assumed when talking about GTK, is a good 2D library. Installing should be easy as this will be in your distributions repository (from the command line as root run apt-get install libcairo2-dev).
Now that I think about it - your new enough to Linux not to look at your repository for software first - learn to do that! I checked and found Ubuntu universe already has goocanvas, just apt-get install libgoocanvas-dev and you should be good to go.
Does anyone know an easy to use graphics library for ubuntu that will actually work.
and can be easily installed?
What is wrong with the big ones:
Qt
gtk
EFL (The Enlightenment libs)
Their instructions are out of date, execute the autogen.sh file first. You'll need the gtk-doc-tools and some other packages to support compiling things.
Edit 1:
Looks like it needs GTK 3.0, glib 2.28+, and Cairo 1.1+ - those are pretty modern. I'm not sure what Ubuntu 10.10 has them (I'm on 10.04), launch Synaptic Package Manager and search for libgtk the header files are in dev packages.
Edit 2:
What sort of graphics package are you looking for? SDL may work, or Cairo.
Using SDL
If you want to use graphics.h on Ubuntu platform you need to compile and install libgraph. It is the implementation of turbo c graphics API on Linux using SDL.
It is not very powerful and suitable for production quality application, but it is simple and easy-to-use for learning purpose.
You can download it from http://download.savannah.gnu.org/releases/libgraph/libgraph-1.0.2.tar.gz.
First install build-essential by typing
sudo apt-get install build-essential
Intall some additional packages by typing
sudo apt-get install libsdl-image1.2 libsdl-image1.2-dev guile-1.8 \
guile-1.8-dev libsdl1.2debian libart-2.0-dev libaudiofile-dev \
libesd0-dev libdirectfb-dev libdirectfb-extra libfreetype6-dev \
libxext-dev x11proto-xext-dev libfreetype6 libaa1 libaa1-dev \
libslang2-dev libasound2 libasound2-dev
Now extract the downloaded libgraph-1.0.2.tar.gz file.
Goto extracted folder and run following command
./configure
make
sudo make install
sudo cp /usr/local/lib/libgraph.* /usr/lib
Now you can use #include on ubuntu platform
Compile it using gcc demo.c -o demo -lglut -lGL
/* demo.c*/
#include <GL/gl.h>
#include <GL/glut.h>
#include <GL/glu.h>
void setup() { glClearColor(1.0f, 1.0f, 1.0f, 1.0f); }
void display()
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glColor3f(0.0f, 0.0f, 0.0f);
glRectf(-0.75f,0.75f, 0.75f, -0.75f);
glutSwapBuffers();
}
int main(int argc, char *argv[])
{
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_RGB | GLUT_DEPTH | GLUT_DOUBLE);
glutInitWindowSize(800,600);
glutCreateWindow("Hello World");
setup();
glutDisplayFunc(display);
glutMainLoop();
return 0;
}
Run it using ./demo
Check this out: We have developed a 2d Graphics library and Windowing System(GWS): https://github.com/MnMInfoTech/GWS