I'm trying to build a Rust program that implements gstreamer on Windows, but I can't figure out how to get the dependencies right. I keep getting this error:
--- stderr
`"pkg-config" "--libs" "--cflags" "glib-2.0" "glib-2.0 >= 2.42"` did not exit successfully: exit code: 1
--- stderr
Package glib-2.0 was not found in the pkg-config search path.
Perhaps you should add the directory containing `glib-2.0.pc'
to the PKG_CONFIG_PATH environment variable
No package 'glib-2.0' found
Package glib-2.0 was not found in the pkg-config search path.
Perhaps you should add the directory containing `glib-2.0.pc'
to the PKG_CONFIG_PATH environment variable
No package 'glib-2.0' found
Process finished with exit code 101
Here are my dependencies in Cargo.toml:
[dependencies]
gstreamer = "0.16.1"
I installed pkg-config via chocolatey pkgconfiglite. I don't know how to get past this error and I'm stumped.
You need to add C:\gstreamer\1.0\x86_64\lib\pkgconfig to PKG_CONFIG_PATH so that pkg-config can find the .pc file for GStreamer.
(Moved actual solution to asker's problem up here from comments. Original answer below the line so the comments make sense.)
According to the gstreamer-rs README:
pacman -S mingw-w64-x86_64-gstreamer mingw-w64-x86_64-gst-plugins-base \
mingw-w64-x86_64-gst-plugins-good mingw-w64-x86_64-gst-plugins-bad \
mingw-w64-x86_64-gst-plugins-ugly mingw-w64-x86_64-gst-libav \
mingw-w64-x86_64-gst-rtsp-server
The README mentions issues with pkg-config and suggests pkg-config-lite, but you seem to already have that so it shouldn't be an issue.
The Chocolatey gstreamer-devel package might have similar results, but it's not the (apparently) official method.
Related
I have installed QT 4.8 library on my OS X through direct install with .dmg file downloaded from qt-project.org. It seems a framework version. And so far, a lot of tools recognises it well. But when I am building octave on this computer, it gives a warning of "Qt libraries not found". I wonder why. And what can I do to make it recognise the qt lib on my machine.
The command I used for configure is
./configure --prefix=/usr/local --enable-shared F77=gfortran-4.2 LDFLAGS='-L/usr/local/lib'
(further information)
I did tried to find the installation of QT with
find find /Library/ -name QtGui
Returning result being
/Library//Frameworks/QtGui.framework/QtGui
/Library//Frameworks/QtGui.framework/Versions/4/Headers/QtGui
/Library//Frameworks/QtGui.framework/Versions/4/QtGui
Along with the fact that ipython notebook --matplotlib=qt is working well on my system, I assume my Qt Library is successfully installed.
But when performing the check with pkg-config, both pkg-config --cflag QtGui and pkg-config --libs QtGui return no positive result.
Make sure your Qt installation is working. I'll assume it was correctly installed and is visible to the operating system you're using.
The configure command you have pasted accepts two environment variables, QT_CFLAGS and QT_LIBS. Use the pkg-config tool to determine their appropriate values:
pkg-config --cflags QtGui
pkg-config --libs QtGui
and add this information to the command line:
./configure QT_CFLAGS='foo' QT_LIBS='bar' # other stuff...
I think I know the answer now. qt-4.8 installed through .dmg file is a framework version. There is no Qt*.pc file, thus is not able to be found by pkg-config. So, in order to use pkg-config to find qt installed in the system, you need to build qt from source(source downloadable from qt-project.org), specifying that a -no-framework version is to be built:
./configure -no-framework --foo --bar
make
sudo make install
After building and installing, qt would be located in(by default)
/usr/local/Trolltech/Qt-4.8.6/lib/pkgconfig/
Thus adding a line to ~/.bashrc
export PKG_CONFIG_PATH="/usr/local/Trolltech/Qt-4.8.6/lib/pkgconfig/:${PKG_CONFIG_PATH}"
would help pkg-config locating the qt in your system.
If you have installed QT by .run file, you might find pkgconfig folder. For me, I have installed QT to "/opt/qt5.15.x/" and I find this path "/opt/qt5.15.x/5.15.2/gcc_64/lib/pkgconfig". Referencing pkg-config-path-environment-variable, I add it to PKG_CONFIG_PATH by
export PKG_CONFIG_PATH=$PKG_CONFIG_PATH:/opt/qt5.15.x/5.15.2/gcc_64/lib/pkgconfig/
And then, Octave configure find QT. And it's better to check the .pc file in your pkgconfig folder. "prefix" in the .pc files might be wrong.
I was trying to install gozmq with the usual go get:
go get github.com/alecthomas/gozmq
However, I was having the following error:
# pkg-config --cflags libzmq libzmq libzmq libzmq
exec: "pkg-config": executable file not found in $PATH
I don't really understand what this error means. Does it mean that its trying to run the command # pkg-config --cflags libzmq libzmq libzmq libzmqand its failing because pkg-config is not on $PATH? What is pkg-config anyway and why do I need it? how do I install it?
I tried brew installing pkg-config but it didn't work and it threw me the following error:
# pkg-config --cflags libzmq libzmq libzmq libzmq
Package libzmq was not found in the pkg-config search path.
Perhaps you should add the directory containing `libzmq.pc'
to the PKG_CONFIG_PATH environment variable
No package 'libzmq' found
Package libzmq was not found in the pkg-config search path.
Perhaps you should add the directory containing `libzmq.pc'
to the PKG_CONFIG_PATH environment variable
No package 'libzmq' found
Package libzmq was not found in the pkg-config search path.
Perhaps you should add the directory containing `libzmq.pc'
to the PKG_CONFIG_PATH environment variable
No package 'libzmq' found
Package libzmq was not found in the pkg-config search path.
Perhaps you should add the directory containing `libzmq.pc'
to the PKG_CONFIG_PATH environment variable
No package 'libzmq' found
exit status 1
not sure why that happened.
EDIT:
As the first answerer suggested, I did:
brew install --devel zeromq
however, I get the following error after I do go get github.com/alecthomas/gozmq
Error:
# github.com/alecthomas/gozmq
37: error: use of undeclared identifier 'ZMQ_SWAP'
37: error: use of undeclared identifier 'ZMQ_RECOVERY_IVL_MSEC'
37: error: use of undeclared identifier 'ZMQ_MCAST_LOOP'
38: error: use of undeclared identifier 'ZMQ_HWM'
seem to be "normal" go errors/warning. But they come from a library I got online. I am not sure what to do, if I should fix them myself or what I should to to address it or e-mail the original developers/community or git issue etc.
You need to install the development versions of those libraries.
$ brew install --devel zeromq
According to issue 98, if you're using zeromq v3.x you need to use :
go get -tags zmq_3_x github.com/alecthomas/gozmq
# or if you're using 4x
go get -tags zmq_4_x github.com/alecthomas/gozmq
Check the README.
I'm using Cygwin on windows to run this command:
g++ `pkgconfig --libs --cflags opencv` -I. -o mergevec mergevec.cpp ....
But I get an error:
-bash: pkg-config: command not found
I've installed cygwin directly on C:. I've added to the PATH environment variable the following:
C:\cygwin64\bin;
C:\cygwin64\lib
I've run cygcheck -c and it gives me a whole list of packages, but pkg-config isn't in that list.
There is a folder called pkgconfig in C:\cygwin64\lib though.
How do I fix this error?
pkg-config is a piece of software that allow your computer to check installed libraries for source compilation. It may not be installed on Windows so in last scenario please check for install.
However in your case i think it is installed, but not set on the right path for linux commands. Try to type in cygwin:
$ export PKG_CONFIG_PATH=c:\\cygwin\\usr\\local\\lib\\pkgconfig
as stated in this post.
Otherwise just abandon Windows and try to compile mergevec on an Linux VM, which is really easier (it was made for it). The only down point of this method is that you will have to do the mergevec operation (and the ones before, otherwise you may have encoding problems) under your linux space. See my previous answer for this manipulation.
If any problem don't hesitate.
run cgywin setup and in package search type pkg-config then make sure that pkg-config utility is installed.
it should solve the not found command problem.
I think that in this case it has nothing to do with the PKG_CONFIG_PATH, because the user complains on the "command not found" error message.
The user probably mixes up pkg-config as a tool (with -) and pkgconfig (without -) as a directory as I see from the command. If I run it without dash on my system I get the same error message of course:
$ pkgconfig --libs --cflags opencv
-bash: pkgconfig: command not found
On Cygwin there is pkgconf.exe as a tool, pkg-config as a symlink to it and pkgconfig as a directory. There is no tool pkgconfig.
If it is not found as pkg-config then it means that pkg-config tool is missing in the Cygwin installation (the solution is to upgate Cygwin tools and select it in the checkbox) or it is probably the symlink problem which I described in https://stackoverflow.com/a/66037850/4807875 (the solution in this case is to use the indeed Cygwin console instead of the native cmd.exe with C:\Cygwin64\bin in PATH in it, or to call explicitly pkgconf.exe).
When running configure it fails with
checking for leptonica... yes
checking for pixCreate in -llept... no
configure: error: leptonica library missing
But I have leptonica 1.69 built (downloaded source and ran ./configure && make install)
Edit
I think configure: error: leptonica library missing is a bit misleading, please note that it first says checking for leptonica... yes, and then fails on checking for pixCreate in -llept... no. So maybe the problem is not that the library is missing, but something else.
I finally managed to make it compile, after reading this and this thread. The proper steps for were:
./autogen.sh
export LIBLEPT_HEADERSDIR=/local/include
./configure --with-extra-libraries=/local/lib
make install
for leptonica 1.69, lib renamed to .libs, so, parameters are
export LIBLEPT_HEADERSDIR=<your_path>/leptonica-1.69/src
./autogen.sh
./configure --prefix= --with-extra-libraries=<your_path>/leptonica-1.69/src/.libs
and so on
Maybe this could solve the issue:
export LIBLEPT_HEADERSDIR=/usr-or-other/local/include
I am working on redhat linux 7.2 . None of the solution worked for me I was getting following errors in config.log. Package lept was not found in the pkg-config search path.
Perhaps you should add the directory containing `lept.pc'
to the PKG_CONFIG_PATH environment variable PKG_CONFIG_PATH
configure script uses pkg-config utility to check for packages . It was not able to find lept package ( although i had installed leptonica seperately ) By setting PKG_CONFIG_PATH pointing to the directory where lept.pc is present , i was able to resolve the issue . export PKG_CONFIG_PATH=/usr/local/lib/pkgconfig
The FAQ addresses this issue and worked for me with tesseract 3.02.02 on Mac OSX 10.6.8.
Apart from the Leptonica library, png, jpeg, tiff libraries had to passed to the configure script with CXX and CPP flags.
To run configure as non-root -
1. LIBLEPT_HEADERSDIR=; export LIBLEPT_HEADERSDIR;
2. CXXFLAGS="-ltiff -lpng -ljpeg" CPPFLAGS="-ltiff -lpng -ljpeg" ./configure --prefix= --with-extra-libraries=
In my case, this issue was caused by a missing compiler. Searching config.log revealed the following:
./configure:17287: g++ -o conftest -I/Usr/local/include/leptonica -L/usr/local/lib conftest.cpp -llept >&5
./configure: line 2040: g++ command not found
Running apt-get install g++ solved the problem. There is an issue in the tesseract issue tracker about this.
In my case (for Ubuntu/Debian) I downloaded the latest leptonica version and the error was not fixed.
To fix it I removed the package "leptonica-dev" with sudo apt-get remove libleptonica-dev and then tesseract found the leptonica version installed from the source code.
Hope it helps!
The answer is going to be slightly different for everyone, depending on the state of your system.
At a high level, the pkg-config software needs to know that leptonica is installed. It searches paths for a .pc file that has the definition for the leptonica package. That file will be in different locations for different people.
You can find it using the Linux locate utility at the command line. locate lept.pc. (If you've done some recent installing/uninstalling, you may need to refresh the locate utilities database with the command updatedb.)
Whichever directory locate finds the file in, export PKG_CONFIG_PATH as that directory (export PKG_CONFIG_PATH=/usr/local/lib/pkgconfig for example).
Then you can continue your configure/build.
i had a similar problem with trying to compile from source, but did not experience it with
apt-get to install tesseract
sudo apt-get install tesseract-ocr
export LIBLEPT_HEADERSDIR=$dir/letonica168/include
./autogen.sh
./configure --prefix=$anotherdir --with-extra-libraries=/$dir/letonica168/lib
make
make install
I am, trying to find the gstreamer lib in windows (msvc) using pkg-config
pkg-config gstreamer-0.10 --cflags --libs
but i am getting any result like this
Package gstreamer-0.10 was not found in the pkg-config search path.
Perhaps you should add the directory containing `gstreamer-0.10.pc'
to the PKG_CONFIG_PATH environment variable
No package 'gstreamer-0.10' found
a .pc like is created when a library is installed (automatically through the use of an RPM, deb, or other binary packaging system or by compiling from the source).I can't find the .pc file in my gstreamer directory.
Should i just create a .pc file with all the necessary details.
prefix=C:\Program Files (x86)\OSSBuild\GStreamer\v0.10.7
exec_prefix=${prefix}
libdir=${exec_prefix}\lib
includedir=${prefix}\sdk\include\gstreamer-0.10
toolsdir=${exec_prefix}\bin
pluginsdir=${exec_prefix}\lib\gstreamer-0.10
datarootdir=${prefix}\share
datadir=${datarootdir}
girdir=${datadir}/gir-1.0
typelibdir=${libdir}/girepository-1.0
Name: GStreamer
Description: Streaming media framework
Requires: glib-2.0, gobject-2.0, gmodule-no-export-2.0, gthread-2.0, libxml-2.0
Version: 0.10.35
Libs: -L${libdir} -lgstreamer-0.10
Cflags: -I${includedir}
or there is any other way to do this or Am i missing somthing?
Hope you can help.Thankz for taking the time to read the problem.
Well i am doing this to find solution why i am getting not found message in my waf configure for gstreamer
conf.check_cfg(atleast_pkgconfig_version='0.0.0')
conf.check_cfg(package='gstreamer-0.10', uselib_store='GSTREAMER', args='--cflags --libs', mandatory=True)
the code works in linux and is supposed to work in windows too.
ADDED LATER
Well making the .pc and setting a path of the .pc dir to the PKG_CONFIG_PATH environment variable does the trick.Its not hard do it
Check out this out. Thankz for readings and helping me..:)
pkg-config is a great tool but unfortunately on Windows (vs. UNIX) there is no standard executable PATH or PKG_CONFIG_PATH.
While you can revert to defining options --with-gstreamer-include-dir ... --with-gstreamer-lib-dir ... and avoid the pkg-config dependency, you can also use --pkgconfig-exe c:\path\to\pkg-config.exe --pkgconfig-path c:\path\to\gstreamer;c:\path\to\otherlib, which will help having a good-looking wscript, especially when using a lot of pkg-config libs.
The typical Win32 user may have issues setting PKG_CONFIG_PATH and PATH directly or stumbling onto a cryptic "not found" error and then checking config.log.
If you do add the windows-specific pkg-config options, it might be interesting for everybody.
You could write a pkgconfig_opts tool and submit it as a waf extra.