I'm using VScode on a Linux workstation and I have some problems with Intellisense. In particular, I have a C++ library installed in my home directory. Then, on my desktop folder, I have a C++ project that is including headers from that library.
I created a folder .vscode with the file c_cpp_properties.json (adapted from here). Now, if I right-click an a type coming from that library, VScode successfully goes to definitions and declarations into the headers of the library. The only thing that is not working is the autocompletion. I tried with ctrl-space, and every time I get No suggestions.
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I have been successfully testing an image processing library (https://github.com/libvips/libvips) in a C++ project in VS2017. I am new to C/C++ and I have been following the documentation here which describes the C way of using the library. There are features I would like to try in the C++ API, but the C++ API needs to be built with the same compiler as my project. According to the author:
It's slightly awkward to set up under Windows. The problem is that C++
does not have a ABI, so you must use exactly the same C++ compiler for
your whole project. This means the libvips C++ win binary (built with
g++) won't work with MSVC C++.
You need to copy the libvips C++ API source code into your own project
and build it with your own code. It's just a few files and pretty
simple to incorporate:
https://github.com/libvips/libvips/tree/master/cplusplus
I have made several attempts to build the minimal set of files but I have not had any success.
My steps so far:
Create a C++ console app in VS2017, set to Debug and x64
Extract the 'vips-dev-8.10' folder from vips-dev-w64-all-8.10.6.zip to where the project file is (this contains all the built .dll files, .lib files, .h files etc.)
Extract 'cplusplus' folder from 'libvips-master.zip' to where the project file is (this has all the project source files including the cplusplus folder which is the part I have to build per the above explanation)
Add the following folders to Project > Properties > C/C++->General > Additional Include Directories
C:\Projects\ConsoleApplicationVIPS3\ConsoleApplicationVIPS3\cplusplus\include\vips
C:\Projects\ConsoleApplicationVIPS3\ConsoleApplicationVIPS3\vips-dev-8.10\include
C:\Projects\ConsoleApplicationVIPS\ConsoleApplicationVIPS\vips-dev-8.10\lib\glib-2.0\include
C:\Projects\ConsoleApplicationVIPS\ConsoleApplicationVIPS\vips-dev-8.10\include\glib-2.0
Add the 5 .cpp files from the cplusplus folder into the project Source Files folder and Add them in the project tree.
Build the project.
As a result I get the following errors:
I haven't written any code yet. I thought I should just be able to point to the .h include files and compile the required C++ files. It's not clear to me what else I might need to add, but it definitely seems like I don't understand the correct procedure to build the project. I watched some videos on C++ compilation like this one but I cant see where I went wrong.
Any thoughts would be much appreciated.
EDITS 3-Jun-21
I have made some changes. I have instead extracted the exact version of the library according to the suggestion by #Frank, and I also discovered the usefulness of the compiler output window, thanks #Alan Birtles.
I am still getting errors, but I am not clear why. The first error is:
E0020 identifier "VImage" is undefined
Which is odd because I have added the folders to Project > Properties > C/C++->General > Additional Include Directories, and one of them is ..\cplusplus\include\vips which contains VImage8.h
And the Output window shows
Any further advice would be appreciated!
I have been programming a game in c++ using the sfml library. However, I would like to adjust some of the code of that library, and use that altered code in my project.
So instead of linking the dll I would like to add the source code and then play with that source code. (e.g. for speed optimization).
I know that doing something like that is generally speaking a bad idea. Howeover, I want to learn by playing around a bit and trying different things.
So how would I add the sfml source code to my c++ project in MS visual studio. Note that I am a total noob. I already tried adding the sfml folder that I downloaded from git in the project properties page called "Additional Include Directories", but i am getting errors, of the form "Cannot open include file: 'SFML/Graphics/GLCheck.hpp': No such file or directory" so I guess that i have not yet done enough.
If you want to modify the source code in the library, all you'd have to do is just navigate to where you have SFML installed and go into the code files with a text editor and edit them.
Then, you could link the library to your VS project the same way you would normally but that library is now modified by you.
Seeing as you have a search directory issue already in VS, you must fix that first. Fix that and then go and modify the library's .hpp, .h, .cpp, whatever files in-place.
To fix the search issue.... I don't use VS for graphics, I use CodeBlocks so I am not sure about their GUI to link libraries and change search directories... but, find out where you installed SFML. Check your /usr/include/, it's probably there. Specify that path in the search directories. Just go and find where that GLCheck.hpp file is located. For Example: Say it's full path is /usr/include/SFML/Graphics/GLCheck.hpp... then /usr/include/SFML/Graphics/ or just /usr/include/ (VS might handle it recursively) needs to be in the list of SEARCH DIRECTORIES.
Good evening,
I have been working on a C++ project from someone of my University which I had to improve for my Bachelor thesis. It basically uses the library libjpeg to do some computation resulting in a steganographic process in order to embed a message into a given image.
Now that the C++ code works smoothly, I'd like to create a little iOS app allowing the user to encrypt whatever message he'd like into an image of his choice. So I created an xCode project following this procedure: using c++ in an iOS app
I also found the following file: libjpeg for iOS which allowed me to compile libjpeg for iOS. Since I'm not so sure how to use the framework freshly created and couldn't find anything sufficiently convincing on the internet, I put all the files (.c and .h) of the libjpeg library into my "include" folder where I have my own .hpp.
xCode only throws me the following error:
xCode error
From what I could gather on several posts, I have to modify the build options of my xCode project to link manually the library, so I tried the following:
Other linking flags
Library search path
This wasn't enough to do the trick and I'm still struggling with the same error xCode throws at me. Any help would be very appreciated on how to proceed!
Thanks a lot,
Theo.
Do not add the .c files to your project, add the libjpeg.a file produced by your build to your project. Add the .h files as you are already doing, or edit the project settings to include their containing folder in the search path.
HTH
I have an existing project that I compile on both Windows using Visual C++ 2008, and Debian Linux. This project uses a standard Visual C++ .vcproj file, and some .cpp and .h files. It does not rely on any Windows specific stuff. Just plain C++.
It compiles and run well on Linux, using a home made tool that reads the .vcproj file to generate a Makefile which is used with make to compile and link all files using g++.
The trouble is that with Visual C++ 2010 (and 2012), the format of the project files have changed. Even the name has been changed from .vcproj to .vcxproj. My home made tool cannot read this new project file to generate the Makefile.
Instead of upgrading the home made tool to support new project files, I was wondering if xbuild would be able to compile my Linux executable?
I tried first to compile my own (VC++2008) project, but xbuild complains that my project is a VS2003 project, which is not supported by xbuild. However when googling on this matter, I find that xbuild is supposed to support VS2005 project files. There are also some references to mdtool to support these old project files, but I seems to be integrated into xbuild now.
Furthermore, I tried to compile a Visual C++ 2010 example (HuoChess) got from the MSDN site. The result is
/Microsoft.Cpp.Default.props: Project file could not be imported, it was being
imported by [...] /HuoChessConsole/HuoChessConsole.vcxproj: Imported project:
"//Microsoft.Cpp.Default.props" does not exist.`
Now, this looks like the project file wants some Microsoft definitions of rules for the Cpp compiler. Should I fake these definitions to use gcc instead? How can I do this?
Is what I want to do ever possible with xbuild?
There is a project GCCBuild which you can use to build vcxproj projects in Linux. It simply uses same vcxproj but uses GCC to compile and build. There are multiple examples there too.
PS. I am the author of that project.
I'm developing an app with Qt and sqlite. I had no problems while I was working under Linux, but now I have to switch to Windows for a while, and i'm stuck with a simple question.
I've downloaded the sqlite source, and compiled it with Qt as a static library. As an output, I've got three files: libsqlite.a, shell.o and sqlite3.o. I strongly believe that the libsqlite.a is my static library.
Now, I want to use it in my project. In the project directory, I've created a folder called sqlite, and put the files inside of it.
After that, I'm trying to add the library to my project. In the .pro file, I add this:
LIBS += -L"/sqlite" -l"libsqlite"
However, I keep getting an error saying:
cannot find -llibsqlite
What am I doing wrong?
"lib" prefix must be omitted.
Use the
-lsqlite
linker directive.
P.S. Another viable option is including the SQLite's sources directly to your project. There's a SQLite "amalgamation" package (only sqlite3.c and sqlite3.h files).