I have trouble in installing PCL 1.9 on my Ubuntu 18.04. Could anybody please help? Really thanks.
I already tried as many tutorials on the Internet. However they both won't work.
When trying to add ppa source and use apt/apt-get to install libpcl-all, it seems that the source doesn't work for ubuntu18.
When I was trying to build the PCL myself, on Ubuntu 18.04, it has lots of dependencies problems. Many tutorials say that using apt to install the dependencies, however some libraries are not available in apt.
There are some people suggesting to use apt install libpcl-dev. Although there is no errors in installation, when I tried to compile an example code, it still doesn't work.
Using pcl-trunk might be your best choice.
git clone https://github.com/PointCloudLibrary/pcl pcl-trunk
cd pcl-trunk && mkdir build && cd build
cmake ..
make
sudo make install
Related
I have GCC v9. But I'm trying to install a GCC 4.8.1 version to test a library compilation on that very old version of GCC.
The version is not available in the official Ubuntu repos,it is deprecated, but I've found it in other mirrors as told by the official GCC website. This one seems like popular one:
https://launchpad.net/~ubuntu-toolchain-r/+archive/ubuntu/test
I have very little knowledge of linux package systems except for the basic. I want to keep both versions. So I should do this:
sudo apt -y install gcc-4.8.1 gcc-9
The reason why I want to use this command and not install it from the file, apart from the difficulty of doing that for me, is that I'm following a guide in order to have several GCCs on my system:
https://www.fosslinux.com/39386/how-to-install-multiple-versions-of-gcc-and-g-on-ubuntu-20-04.htm
When I add the url to the sources.list file seems like it is working.
sudo add-apt-repository ppa:ubuntu-toolchain-r/test
sudo apt update -q
But when I try to call the install with gcc-4.8.1 or gcc-4.8 , or even gcc-4 the package doesn't exist.
Package gcc-4.8 is not available, but is referred to by another
package. This may mean that the package is missing, has been
obsoleted, or is only available from another source E: Package
'gcc-4.8' has no installation candidate
Also, I don't know if websites like these can be added to the repos list in order to find the package using APT:
http://www.netgull.com/gcc/releases/gcc-4.8.1/
[EDIT]
I downloaded the package from the website I linked. I have no idea how to install this by hand. If only I could find a repository that could help me with this... I have no idea how to make APT help me with the installation.
But I'm trying to install a GCC 4.8.1 version to test a library compilation on that very old version of GCC.
Developers have tools up their sleeve so they don't have to install dependencies and bloating their systems for every library (and every configuration of that library!) they want to try out and test.
Use docker. You could write for example a testing script, assuming your project uses make:
# test_my_lib_in_gcc-4.8.sh
#!/bin/sh
docker run -ti --rm -v $PWD:/project -w /project gcc:4.8 -u $UID:$GID sh <<EOF
make && make test
EOF
that will compile and test your application in using 4.8 gcc. Consider how easy it is to change gcc version - just change the number. You could test your library in gcc, in different versions, and using other compilers and on different distributions to make sure it works for others. If you're a developer of the library, write an automatized CI pipeline that would automatically test your application each commit in specific docker environment, using ex. https://docs.gitlab.com/ee/ci/README.html or https://travis-ci.org/ .
I am using Ubuntu 18.04
I built a mips cross-compiler using buildroot, but when I tried to test whether it would work,I got this message
/home/daisy/repos/repo/buildroot/output/host/bin/../libexec/gcc/mipsel-buildroot-linux-uclibc/9.3.0/cc1: error while loading shared libraries: libmpfr.so.6: cannot open shared object file: No such file or directory
I searched for solutions , one of which said this:
sudo pacman -S mpfr
Well , my Linux isn't archlinux, this didn't work for me.
somebody please tells me how to deal with it.
The above suggestions of installing libmpfr on your host system are wrong. Buildroot is supposed to have build libmpfr, it should be present in host/lib, and picked up by the cross-compiler by virtue of it having a proper RPATH. If it doesn't work, we need to figure out why, but the correct thing is not to install libmpfr on your host system.
In Ubuntu, apt command (Advanced Packaging Tool) is used for performing such functions as installation of new software packages, upgrade of existing software packages, updating of the package list index, and even upgrading the entire Ubuntu system.
Try this command :-
sudo apt-get update
sudo apt install libmpfr6
This will install shared libraries: libmpfr.so.6 to your Ubuntu system.
Hope It Helps !
Is there a good way to install latest cmake version from CentOS 6.5?
I'm doing yum install cmake but it's giving me 2.6.4 from base repo which I don't want.
I tried installing cmake28 but the problem is that when I try to do ./configure it throws an error saying cmake is not available.
rpm -Uv ftp://ftp.pbone.net/mirror/ftp5.gwdg.de/pub/opensuse/repositories/Application:/Geo/CentOS_6/x86_64/cmake-3.0.0-143.1.x86_64.rpm
Hope this helps to somebody. If you have any problems with it let me know. Have fun.
I know this is an ancient question, but I got here by google searching and wanted to share what I knew so far.
when you sudo yum install cmake28, you get a /usr/bin/cmake28 binary on your machine. You can setup a symlink to make your configure script work via the following:
sudo ln -s /usr/bin/cmake28 /usr/bin/cmake
Not sure why the cmake28 package doesn't do this for you.
Well, after looking at the tutorial CMake gives on their website, it says download this and after that you have too type "./bootstrap" followed by "make" and "make install".
If you get any errors type "sudo" in front of all the said commands. If that doesn't work, your best bet would be too login to the root account by typing "su" and the root password following that.
If you already have cmake installed you should either follow the steps cmake offers on their website or try the command "sudo yum remove cmake".
A friend and I are interested in training the tesseract-OCR engine for a CV project. We tried using some wrappers such as PyTesser and pyocr, but the results are currently not as accurate as we need them to be. As such, we want to try training the tesseract to perform better for our purposes (i.e. identifying text on food labels), but are having some trouble installing the training tools.
What we've tried:
Looking on the google code website, the 'Compiling' page on the tesseract's google code wiki says the training tools are only available on version 3.03. However, the google code 'Downloads' page for tesseract-ocr only has the materials for 3.02. The bottom of the 'Compiling' page also has some comments about installing version 3.03 on Windows and OSX, but no comments yet for Linux users.
There also appears to be some sort of 3.03 source package for Ubuntu but we're not sure how to access it on our computers and the 'Compiling' page says we need to run these commands:
make training
sudo make training-install
We've also found a google group thread about tesseract 3.03 but again it seems like these posts do not include advice for Linux users (unless we missed something during the initial read).
Is this actually a really simple command-line install problem? Or, is there a way train tesseract with 3.02 (which we currently have installed)? Have we been looking at the wrong places for information?
Any advice or links to instructions for installing tesseract-ocr 3.03 for Linux distributions would be greatly appreciated! Thanks.
Tesseract can directly be installed in Ubuntu 14.04 using
sudo apt-get install tesseract-ocr
I don't have any idea if you can do it in older version of Ubuntu because the repo might be updated in later version of Ubuntu.
I had an aws ubuntu 14.04 instance.
when I tried installing Tesseract with
sudo apt-get install tesseract-ocr
It retuned package not found
But this worked for me.
sudo apt-get update
sudo apt-get install tesseract-ocr
Ubuntu is a debian based Linux distribution. The tesseract package you find will most likely be a debian package which will contain tesseract and the required default language files to allow you to run/train tesseract. You do NOT want the source package -- unless you just want to compile it yourself -- no need. You will not have to build tesseract, you just need to install the package. First, it appears you are new to Ubuntu, so please ready InstallingSoftware. It can be as easy as opening up an x-term and issuing the command apt-get install tesseract-pkgname (note: that means whatever the package name is).
There is no shortcut, take the time to understand whether you have a .deb package on your box that need to be installed or whether you are installing from a remote repository. The link above explains how to handle both.
Here is a specific Ubuntu thread dealing with installing tesseract Tesseract 3.0 + Ubuntu 10.04 Installation Guide Hope that helps. Tesseract is very good software.
I don't have any instructions for building Tesseract 3.03 for Linux specifically (I'm on Mac), but here's a link to download the source code for the 3.03 release candidate: https://tesseract-ocr.googlecode.com/archive/3.03-rc1.tar.gz
First run below command
sudo apt-get install tesseract-ocr
It will install tesseract version 3.04
Run below to update the tesseract
sudo apt-get --only-upgrade install tesseract-ocr
It will update tesseract to 4.1.3
I've tried installing different libgmp's from ubuntu app center and I tried installing it manually from http://gmplib.org/#DOWNLOAD but I can't get this to configure it's an old library and I'm trying to run it on the latest version of ubuntu but I didn't think I'd have problems but I'm new to trying to use libraries like this any help would be greatly appreciated.
I've had these kind of errors installing dependencies before, and I realized that you must to force the installation of such pack having it... you didn't mention the version of your Ubuntu, so I'm assuming you're working with 12.10. But if not you always can look up for the version you are running on.
Just download the pack from here, of course, depending on your architecture, and after that run sudo apt-get -f install in order to force the installation of broken packs.