Eclipse cross-compile... how can I do that? - c

I am developing on a Windows machine using Eclipse in C code.
All the files are physically located on a Linux server.
I am using Eclipse only for editing and code browsing.
When I want to compile, I open a terminal and telnet to the Linux server from which I call a file that sets up few variables and eventually invoke a "make" command.
The server is pretty busy.. I would then like to be able to compile locally [and then just ftp these executable files back to the Linux machine so that I can execute them.. unless Eclipse can do that on its own :) ].... any idea how can that be done? I am not well versed in Eclipse or OS usage.... so if you could answer and explain what I should do.. I would really appreciate...
I changed the Build Command under Project Properties menu by just calling the script file on the server I usually invoke to compile... That looked fairly simple.. well... that was too good to be true... and of course.. it didn't work! I am getting this error if I use the default "make" (Cannot run program "make": Launching failed).... while getting (Cannot run program "T:\compile": Launching failed) if I try to invoke my script file that I use to compile...
thanks,

You should take a look at running a crosstool-ng setup on your windows box inside cygwin. And then have eclipse use that compiler. This will allow you to develop for your target Linux platform easily.
Here's some slides
It sounds like you're developing for a desktop/server platform, so you'll have to make sure you set up your crosstool-ng with the same versions of standard libs as your server has (libc, libstdc++, etc). You also want to make sure your crosstool-ng has the same version of gcc as the target as well.
If you don't want to mess with getting all that setup, you could always install Linux as a virtual machine on your windows box and work inside there.

Related

How to synchronize code files on windows with WSL/linux?

Basically I have some C/C++ code that I need to build and debug on a Linux machine. Unfortunately, my windows laptop doesn't have enough free hard space to install some Linux dist nor does it have enough free RAM to comfortably run VM.
Until now, I dealt with it rather comfortably using WSL, but the scale was rather small. It was easy to edit and debug 2-3 .c files through CLI and gdb, but it became really annoying on a large scale projects.
I want something simple as "edit code in windows IDE [X], compile it on remote Linux/WSL (the project uses Makefiles), and preferably debug it via gdb".
VS has something close to what I want, but it can't deal with existing Linux projects. It needs to create a new configuration which is alien to the project's Makefile.
I know this question is a bit old, but I think the solution is to make a symlink between your WSL folder and the Window's folder. This is how I handled it for a Ubuntu-20.04 WSL:
Access PowerShell in Administrator mode
Type cmd.exe in the PowerShell
Once cmd.exe is opened, type mklink /d C:\<path_to_your_Windows_folder> \\wsl$\Ubuntu-20.04\home\<your_user>\<path_to_your_WSL_folder>
EDIT
This was tested under Windows 10 Version 2004 with WSL2
I'm unsure about C and C++ but it sounds like this is exactly the same as how i work in node and javascript every day.
I checkout my code using git inside WSL to a location like /mnt/c/code/myproject. Then using sublime/VS code/webstorm i edit the files in windows in the location c:\code\myproject this works really well and have been doing this every day for over a year.
Things to be aware of are that you need to ensure that your editor of choice saves files with linux line endings and that all command line operations are done inside WSL.
Please see this article to see the differences between windows and linux files and how this works inside the WSL.
I want something simple as "edit code in windows IDE , compile it on remote linux/WSL
You will have something as simple as that.
Only with Windows 19.03 though:
See "Updated WSL in Windows 10 version 1903 lets you access Linux files from Windows"
Microsoft's Craig Loewen says:
In the past, creating and changing Linux files from Windows resulted in losing files or corrupting data. Making this possible has been a highly requested and long anticipated feature. We're proud to announce you can now easily access all the files in your Linux distros from Windows.
So how does this work? He goes on to explain:
To put it briefly: a 9P protocol file server facilitates file related requests, with Windows acting as the client.
We've modified the WSL init daemon to include a 9P server. This server contains protocols that support Linux metadata, including permissions.
There is a Windows service and driver that acts as the client and talks to the 9P server (which is running inside of a WSL instance).
Client and server communicate over AF_UNIX sockets, since WSL allows interop between a Windows application and a Linux application using AF_UNIX as described in this post.
Warning:
The old rules still apply, you should NOT access your Linux files inside of the AppData folder!
If you try to access your Linux files through your AppData folder, you are bypassing using the 9P server, which means that you will not have access to your Linux files, and you could possibly corrupt your Linux distro.

Program done how can I use it on other PCs?

I just finished coding my c program in visual studio (VS) and what I had done is just drag the compiled .exe file out of the folder to run it on other computers, except on other computers for that to work I guess I need VS since it says the MSVCR110D.dll is missing which is from VS. So how can I run my program on other computers that don't have VS?
You can use IExpress which is used for distributing self-contained installation packages. It is there in every windows machine preinstalled. Using this utility you can make the executable .exe which will be incorporated with dependent dlls. You can see Step by step guide, to see how to use it.
Follow these steps
https://msdn.microsoft.com/en-us/library/3w7axy17.aspx
In your output window it will show you where you can find the exe file, usually something like "ProjectName/Debug/Release/"
If you have added any external libraries you will have to copy any DLL files in that folder with the exe (You can combine them with some applications if needed)
You will also have to make sure that you have the correct version of the .NET Framework on the PC that you are trying to run your program on

Getting the examples in libspotify to work under Windows 7

I want to get started with libspotify on my Win 7 machine but I dont have a clue on how to get it all setup so that I can even run the examples included in the pack. I have a Spotify Premium account and I have tried installing libspotify by copying libspotify.dll to c:\windows, c:\windows\system32 and to c:\windows\SysWOW64 and also changed the path variable to include the path where libspotify.dll is located but I still dont understand how to get the examples to work.
I have Code::Blocks installed but as soon as I try to import and run any of the .c files included in the /examples/ folder I get all kinds of error messages. The truth is that I am not even sure how to install libspotify and the documentation is absolutely non existent so for a beginner it is impossible to even have a chance at getting started.
Is there somebody out there who can do a simple walkthrough on how to install libspotify and get the examples up and running on a Win 7 (64-bit) machine?
The only thing I really want to do with libspotify is to be able to via a command prompt or something like that be able to queue a song in Spotify so I dont really care about the other parts. But I can probably solve that by myself as long as I can get an example up and running.
Sadly libspotify is not well-supported on Windows, in fact the example code won't even build because there is no Windows audio driver for them. Your best bet to just get up and running would be to use mingw, or linux in a VirtualBox environment.

Cygwin Gcc - Access

I'm currently on Windows Vista Basic.
I have recently started on Eclipse, and for that I was required to install cygwin.
After that I made an edit in the PATH environment variable in "My Computer>Properties>Advanced Settings". In order to check the functionality, I started cmd-prompt and types
C:>gcc
This gives the following output: ACCESS IS DENIED
I know it's a security permission problem, but I don't know where exactly to do the change in the security settings. Last time I tried it started showing "error-illegal operation" and some error code.
You can not use gcc in your cmd. you must use it in cygwin shell that installed when you install cygwin
You can use gcc without using the cygwin shell !!
But you will probably end up with some configuration problems,
such as not having the correct dll's in the right places.
Another common error that can occur, is if you have multiple instances
of cygwin installed, the search paths get confused and the gcc system
can't find relevant compiler or tries to use the wrong compiler.
All the same this is very possible, I've done it myself hundreds of time,
when testing compilers I have written.
You might want to try invoking 'cc1.exe' for c, or 'cc1plus.exe' for c++,
remember to copy the cygwin dll's into the same directory as cc1 or cc1plus,
Other than that it could be your user account permissions.
Hope this helps.
/Tony

Confusion about System.Data.SQLite.dll

The site, http://sqlite.phxsoftware.com/, talks about a mixed-mode assembly and a managed-only version of the provider. Are they both named System.Data.SQLite.dll? I installed the managed-only version in windows and it is working. Which, as I understand it, means that I must also have the native sqlite3.dll file somewhere on my machine that it is finding, right?
When I try to get my assembly to run on Linux with Mono, I get an EntryPointNotFoundException looking for sqlite3_open_v2. So I downloaded the precompiled shared-library for Linux without the TCL bindings from http://www.sqlite.org/download.html and placed it in the same folder as the other assemblies. But that didn't change anything.
The page at http://www.mono-project.com/Interop_with_Native_Libraries says Linux will look at my LD_LIBRARY_PATH environment variable. So I set that to contain '.', the current directory. That didn't work either.
So then I copied sqlite-3.6.19.so to sqlite-3.so, sqlite3.so and sqlite.so. Still no change.
What am I missing?
Instead of using System.Data.SQLite.dll on Windows and Linux, I decided to use Mono.Data.Sqlite.dll on both sides.

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