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As a "user" why should I (have) to do that ?
It used to work just fine - giving a hardware usage in % ...
Now it ..... as posted.
Thanks for reply.
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Member 14968771 wrote: As a "user" why should I (have) to do that ?
Because it is Free and Open Source Software.
It is given to you so that you can fix it yourself. That is what the free-ness and open-ness is about. You may of course ask your friends to fix it for you, or even pay someone to fix it (although that sort of kills the "free" idea, at least in the sense of "free beer").
When you accept a "free" offer that is financed by ads and commercials, then you are the product being sold.
When you accept "free" and open sources software, then you are the maintainer of that software.
This is 101 FOSS.
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How do you react to this :
run OS update - manually or automatically and after reboot get
'... OS is experienced internal error... (send us this message ) "
If you say " what do you expect for free " this discussions is over.
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I am not allowed to post on Linux site, so I am posting here.
I have never done this so I am confused with these instructions.
I like to install the Qwt library "under" my Qt folder.
I am using QtCreator so my qmake is current and working, so I skipped verifying qmake.
qwt-6.2.0 folder did not exist on my system so I did
cd Qt
mkdir qwt-6.2.0
then I get lost what to do next...
this folder obviously does not exists in /Qt folder
/usr/local/Qt-5.0.1/bin/qmake qwt.pro
Unix-like systems
The first step before creating the Makefile is to check that the correct version of qmake is used. F.e. on older Linux distribution you often find a Qt3 qmake and in the path.
The default setting of qmake is to generate a makefile that builds Qwt for the same environment where the version of qmake has been built for. So creating a makefile usually means something like:
cd qwt-6.2.0
/usr/local/Qt-5.0.1/bin/qmake qwt.pro
The generated Makefile includes all paths related to the chosen Qt version and the next step is:
make
( On multicore systems you can speed up building the Qwt libraries with running several jobs simultaneously: f.e. "make -j4" on a dual core. )
Finally you have to install everything below the directories you have specified in qwtconfig.pri. Usually this is one of the system directories ( /usr/local, /opt, ... ) where you don't have write permission and then the installation needs to be done as root:
sudo make install
( On systems where sudo is not supported you can do the same with: su -c "make install" )
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hci_tool "commands " are derived from "blueZ" library.
Using hci_tool commands in C/C++ (source )code is ....
The hci_tool scan command is implemented in "blueZ" as hci_inquire....
hci_tool --help give a nice overview of all the command options.
Is there a real (written) resource to "translate" hci_tool commands to "blueZ" library functions ?
OK - I found hci_lib.h where all the (function) declarations are...
Now if I can get FUNCTION DESCRIPTIONS I will be closer to "best guess" how hcitool commands and bluez function relate. Is there such documentation anywhere ?
It is NOT in "blueZ" on github .
?
modified 25-Mar-22 0:38am.
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Thanks - that is what I am using. It is odd there is no documentation.
Most functions use same or similar variables , but...
for example "device_desc" and "dd" are same...
This "open" concept is not that open - somehow "job security" comes to mind instead...
Perhaps "Most commonly used variable names dictionary (u-tube) " is overdue.
int i = index of something...
int error = error number ( duh )
Have a great day
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Member 14968771 wrote: for example "device_desc" and "dd" are same...
Maybe, but that is not a rule that you can rely on.
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It is against my conviction to use "blueZ' but ....
I am trying locate the actual library to link my program with.
From experience I know the file names change so I really do not know what to search for
bluez ... bluetooth..libbluetooth... libbluetooth.so...
I decided to remove and install and hoped for answers..
No go!
What name am I looking for and where is such file located?
Cheers
q5@q5-desktop $ sudo apt-get remove libbluetooth-dev
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
The following package was automatically installed and is no longer required:
libfwupdplugin1
Use 'sudo apt autoremove' to remove it.
The following packages will be REMOVED:
libbluetooth-dev
0 upgraded, 0 newly installed, 1 to remove and 4 not upgraded.
After this operation, 847 kB disk space will be freed.
Do you want to continue? [Y/n] Y
(Reading database ... 195509 files and directories currently installed.)
Removing libbluetooth-dev:amd64 (5.60-0ubuntu2.2) ...
q5@q5-desktop $ sudo apt-get install libbluetooth-dev
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
The following package was automatically installed and is no longer required:
libfwupdplugin1
Use 'sudo apt autoremove' to remove it.
The following NEW packages will be installed:
libbluetooth-dev
0 upgraded, 1 newly installed, 0 to remove and 4 not upgraded.
Need to get 0 B/252 kB of archives.
After this operation, 847 kB of additional disk space will be used.
Selecting previously unselected package libbluetooth-dev:amd64.
(Reading database ... 195466 files and directories currently installed.)
Preparing to unpack .../libbluetooth-dev_5.60-0ubuntu2.2_amd64.deb ...
Unpacking libbluetooth-dev:amd64 (5.60-0ubuntu2.2) ...
Setting up libbluetooth-dev:amd64 (5.60-0ubuntu2.2) ...
q5@q5-desktop $
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Short answer is you don't need to know. When linking your program with -lbluetooth should be enough, if it's installed in the usual place. Depending on what your development environment is, you can use pkg-config to tell you what flags you need to use to find headers and libs e.g
k5054@localhost:~$ pkg-config --cflags bluez
k5054@localhost:~$ pkg-config --libs bluez
-lbluetooth
k5054@localhost:~$ This tells us that we don't need any additional flags for compilation, and only need to add -lbluetooth when linking.
If you really want to know where the lib is, you can use dpkg to tell you where it is
k5054@localhost:~$ dpkg -S libbluetooth | grep .so
libbluetooth3:amd64: /usr/lib/x86_64-linux-gnu/libbluetooth.so.3
libbluetooth3:amd64: /usr/lib/x86_64-linux-gnu/libbluetooth.so.3.19.3
libbluetooth-dev:amd64: /usr/lib/x86_64-linux-gnu/libbluetooth.so
k5054@localhost:~$ Note that debian/ubuntu uses the target architecture as part of the filename for libraries, so for a PI with a 32 bit Raspberry Pi OS, the path is /usr/lib/arm-linux-gnueabihf/libbluetooth.so.3, and it would be different again for a PI with a 64-bit OS, or an i386, MIPS, etc.
Keep Calm and Carry On
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Member 14968771 wrote: The following NEW packages will be installed:
libbluetooth-dev
So the option to use in your build should be -lbluetooth-dev. But you also need to check that it is installed in one of the automatically searched locations. The names of these will be in the environment variable LD_LIBRARY_PATH. If the library is not in one of those places then you can:
1. Add its name to the envoronment variable, or
2. Use the -L option on the build.
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I hope nobody will complain about this post HERE.
I run and was "run off" from other places.
I am going back to use "bluez" to program (C++) Bluetooth application.
I downloaded "blueZ" and trying to follow instructions...RTFM...
... change to folder where bluez source is and execute "./configure"....
There is no "configure" to be found.
PLEASE help me with link to real "blueZ" instructions ( NOT the original link, please - been there - hopelessly outdated and NOT supported ) or suggest resource of REAL latest and workable / working "blueZ" .
THANKS
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Member 14968771 wrote: PLEASE help me with link to real "blueZ" instructions ( NOT the original link,
Since you have not told us which one does not work, I assume you meant the one at bluez.org. So maybe try Bluetooth Management | Ubuntu[^].
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What's wrong with the bluez package shipped with your distribution? You can install the package using apt install libbluetooth-dev for debian based distributions (Debian, Ubuntu, PI OS, etc), or dnf install bluez-libs-devel for RedHat based distributions. There also seems to be bluez packages that are targeting QT, so those might be useful to you, too.
Update: If you insist on building from source, you need to generate your own configure script from the included configure.ac. The INSTALL document mentions that you should build this using autoconf, but if you try that you'll probably get something like
$ autoconf
configure.ac:5: error: possibly undefined macro: AM_INIT_AUTOMAKE
If this token and others are legitimate, please use m4_pattern_allow.
See the Autoconf documentation.
configure.ac:11: error: possibly undefined macro: AM_MAINTAINER_MODE
configure.ac:24: error: possibly undefined macro: AM_PROG_CC_C_O
configure.ac:25: error: possibly undefined macro: AC_PROG_CC_PIE
configure.ac:26: error: possibly undefined macro: AC_PROG_CC_ASAN
configure.ac:27: error: possibly undefined macro: AC_PROG_CC_LSAN
configure.ac:28: error: possibly undefined macro: AC_PROG_CC_UBSAN
configure.ac:35: error: possibly undefined macro: AC_DISABLE_STATIC
configure.ac:36: error: possibly undefined macro: AC_PROG_LIBTOOL
configure.ac:44: error: possibly undefined macro: AM_CONDITIONAL What you ned to do instead is use autoreconf --install. This will build a new configure script which you can then use to build the bulez library.
Keep Calm and Carry On
modified 13-Mar-22 14:23pm.
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I recently installed ubuntu on a spare computer (Surface Pro 3)and have been playing with it.
I'm familiar with Linux in general and used it extensively in the past.
Now I need to get some programming done, specifically desktop engineering apps wit graphics, like graph and fluidstreamline map displays.
What is the best IDE for that purpose? I foresee most coding will be in c/c++.
CQ de W5ALT
Walt Fair, Jr.PhD P. E.
Comport Computing
Specializing in Technical Engineering Software
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I haven't done C++ development on Linux but eventually hope to, at which point I'll probably go for this: Running Visual Studio Code on Linux[^]. A lot of folks on this site like VS Code, but I'm still on VS2022, mostly because my project has over 800 source files and I don't want to bang my head against a new build process.
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I tried VsCode. It's in the Ubuntu repository.
Unfortunately I couldn't get even Hello World to compile and run, so I went back to gedit and gcc/g++.
Now I need to find out how to do graphics drawing.
I finally settled on Lazarus/freepascal.
It's just like Delphi, which I used to use extensively. software is running and drawing graphics nicely now. Allbeit in Pascalrather than C++;
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Eclipse or QT - QTCreator
Do not mention to anybody in QT you are looking for "IDE" - they call it "library" .
73 AA7EJ Vaclav
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I know this is old but in case it helps anyone, look at Eclipse.
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The reply immediately above yours, posted back in March, already mentioned Eclipse.
And resurrecting an old thread to post a link immediately looks suspicious. I had to resort to Google to double-check that the link you posted is the real Eclipse site, and not some spam knock-off.
"These people looked deep within my soul and assigned me a number based on the order in which I joined."
- Homer
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Dear Team,
I am learning about install ubuntu server on the server with multiple hard drive. Instead of investing on the real server and real physical hard drive, is it any solution that I can run the software simulator of partition hard drive in linux (Exp: Create RAID or LVM)?
Thank,
Kanel
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Does Vmware or Virtual box not suit your needs?
Keep Calm and Carry On
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Hi guys, first post on this discussion forum ever. Nice to meet you all. Hope this belongs here.
I have just returned to college for IT after a lapse in enrollment. We're going to be working with Linux more in the future, and even the Powershell in Windows too. I have been messing around with the Raspberry Pi I got for one of my classes, but I pretty much have to Google every command I use in the terminal for it since I'm not that familiar with Debian (sorry, Raspbian), the Powershell, or Linux terminals at all.
My question is this: what are some essential, need to know commands for moving around in and using the Powershell? You can give me one or several, list form, add a short description of what it does, whatever. I'll be jotting them all down in my notes with some extra fluff anyways for future reference.
Appreciate it guys, thanks.
TL;DR: Need useful, necessary Powershell / Linux terminal commands.
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