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I downloaded an open source library. It asked me to execute this file called "do" with the command ./do. Then it kept building the library for about 10 min. What is building a library exactly?
Building means compiling the source code to an executable format. A library is a term used to define reusable components.
For example, if you want to do some date conversion operations like dd/mm/yyyy format to mm/dd/yyyy, you can either write your own code or you can use re usable code which is already written by someone. Those reusable codes can be released to the public in many license forms; one of them is open source.
If the code is open source, the source code will be available for anyone to download. Sometimes the compiled version of the source code will also be there. Instructions will also be provided how to compile ( in other words , "build" ) the source code to an executable format which can be used in your code and that's what it means by "building" a library.
For an example, see the Joda-Time Java library.
Building is the process which encompasses source generation (for YACC, Qt MOC etc.), compilation of source code and linking of resulting object files. In brief: it's the sequence of operations that turn human readable source code into a machine-readable binary library.
Pro tip: read the description of the tag build under your question.
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This question may seem stupid, but as a beginner I did encounter this question when I moved forward, and I couldn’t find any information.
https://upload.cc/i1/2020/12/30/rUEC9s.png
https://upload.cc/i1/2020/12/30/d7Gwbr.png
https://upload.cc/i1/2020/12/30/6vr3lQ.png
This is an open source C++ program, I tried to compile and run it, but it failed
I have the following confusion:
Why the program does not have main.cpp
Update: When asking the first question, I even forgot helloworld.cpp, sorry
How do I compile and run it with CLion
Update: Usually I create a new project. After I create the project, it seems that it can be compiled and run for granted, but I don’t know how to compile and run an existing project (from others).
What do the folders in the first picture usually refer to
What does cmake and CMakeList.txt mean?
This open source program calls opencv, fftw and other libraries. I downloaded the corresponding files on the official website. How should the program call these libraries next?
If I download the library package on the official website, how should I install or configure it; if I install the package using homebrew, does that mean I have already configured it? Or I just finished downloading
I have written some programs in c++ and qt, but I don’t seem to know anything about c++
Finally, there is really nothing in the readme of this project
Your questions are too broad. Generally speaking, the answers would be something like this:
Naming your main file main.cpp is a convention, but is not required. What is required is a main() function (More info here).
You have to configure CLion to open Makefiles. There is a tutorial in CLion's website (Here).
What documents do you refer to?
src: Naming convention to the folder where the source (.cpp) files go.
include: Naming convention where the header (.hpp) files go.
License.txt: Where the software's license is written.
readme.md: Document that gives information about the project.
tests: Files to test the software.
cmake is a tool designed to build and package software (Their website is here). CMakeLists.txt is the file CMake uses to know how to create a Makefile and build the program.
You have to make the system know where the libraries are. You can achieve this by adding them to the project's folder or by adding them to the PATH of your compiler.
If you don't know very much about of C++ you should probably search a good C++ textbook. However, remember that Makefiles and C++ are 2 completely different things.
Most open source programs have build instructions somewhere in the readme.
It is usually best to follow those, even if they require downloading unfamiliar tools.
If the project doesn't have (detailed) build instructions, you should ask the owner, to add (more detailed) build instructions(by for example creating an issue for git-based repositories).
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Is there anyway to compile C++ source files in Linux and make these files unreadable to users? Either have the files encrypted or read them into memory is acceptable.
We are developing a Linux based software and we don't want our users to have direct access to our source code files.
Once a binary is created from C++ source files, the original source files are not needed in order to run the program. You can distribute only the compiled program.
Just build a container image with your software and its dependencies and run it anywhere. No need to distribute sources or compile for specific distributions.
You can use Flatpak or Docker, for example.
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I use Visual Studio 2017 Community for C++ coding. I have made a simple win32 console app and do not want to expose my code. I have also found the .exe file in the debug folder of the solution. When I try copying the .exe file in the Debug folder in another folder it says that the dll isn't found.I also tried copying the whole folder but the same error occurs. Please help me...I want to run my app on another computer also.
You can Generate Code Map for Solution.
Navigate to Architecture –> “Generate Code Map for Solution”
Generates a code map like:
Which shows the inter-dependency between modules and libraries.
In your case by just copying the exe, you are breaking the references to all of the required libraries. Depending on your scenario, you have two good options. Copy the entire source tree + dependencies for you project and recompile it in the new working directory or create an installer which will allow you to distribute dlls and any other required resources.
This is more complicated that one might hope. To answer the question in the title, you need Dependency Walker. (The web site doesn't mention Windows 10, but this stuff hasn't changed much recently, so don't worry about that.)
To distribute the program to another machine, you need to create a release build (the debug run-time libraries are not redistributable). Once you have done that, you will almost certainly find that the other machine already has the release run-time library, but you will need to copy other libraries.
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I'm writing updater program in C++, i need extract files from them.
I'm using Microsoft Visual Studio.
What I'd like the achieve:
User runs exe
exe unpacks files
exe runs one of extracted files
Can anyone recommend a good solution?
Thanks!
Extracting resources from a file with C++:
Extract file from resource in Windows module
Self-Extracting Executable C++
http://www.codeproject.com/Articles/4221/Adding-and-extracting-binary-resources
You're writing an updater.
User runs exe
exe unpacks files
exe runs one of extracted files
So your program should:
Download the patch from the server (use a networking library like winsock or something higher-level)
Unzip the archive (depending on the format in question, there should be libraries for that, like zlib)
Move the new files and overwrite the old ones (use win32 or something higher-level like MFC or Qt)
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I am working on a raspberry pi project that I have picked up from a previous groups work.
It seems that the program used to control the raspberry pi has been compiled and we can run it fine, however there is no original source code (C++) or any project files for Qt as far as I can see, below is a copy of the folder, is there any way to get at the source code using Qt or something else?
We want to be able to make changes to the program.
There is no documentation on the build of the software, only indication on how to run it which we can do fine, I am trying to track down the authors but to no luck.
What can I try? I tried opening the files here with http://codelite.org/.
All of the object files and the turbo_gui file just contain one line: ELF SOH SOH SOH
On the image you posted, the directory is a Qt build directory, not a source directory.
The folder you showed contains some source files automatically generated by Qt, some compiled .o files and a linked binary, but not the original source code.
If the authors didn't publish the original C++ source code, there is no way to get the exact source code back. You should ask the authors to send you a copy of the source code.
If there is no way to get the source code, the best you can do is use a disassembler or decompiler (such as Hex-Ray's plugin for IDA) to get an idea of how the code works, then reimplement it yourself.