I was trying to re-use an available source code for my own project, it can be found here:
https://github.com/TadasBaltrusaitis/OpenFace
I tried compiling project FeatureExtraction of the original code, everything was fine. Then I created a new empty project and added the following #include:
#include "LandmarkCoreIncludes.h"
#include <Face_utils.h>
#include <FaceAnalyser.h>
#include <GazeEstimation.h>
These are exactly the same as in project FeatureExtraction in the provided source code. I've already changed the additional include directories in C/C++ general tab into:
$(SolutionDir)\lib\local\FaceAnalyser\include
$(SolutionDir)\lib\local\LandmarkDetector\include
However, it still gave me "cannot open source file error".
Update: If I put the absolute path of the header file directly to the code it is OK, however if I put the absolute path to the Additional Include Directories, the error remained.
Use #include "header.h" instead of the one with diamonds (< and >) which looks in another directory.
After that, check if the header files really are in these directories. If they are, you should check the $(SolutionDir) ( I don't use a '\' after the $(SolutionDir) but it may work out as well).
Try to locate and delete the .suo file and restart VS
Looks like I had same "bug" as mentioned in this post here:
Visual Studio does not honor include directories
After having changed the Additional Include Directories for all platforms instead, the code was compiled without any errors.
Related
So I have been trying to learn cpp and I was writing a program, and when I try to build the solution, it gives an error saying
unexpected end of file while looking for precompiled header. Did you forget to add #include "pch.h" to your source?
Then I included it and I got the same error, and also another saying
cannot open source file pch.h
One option, if you are new to c++, is to just turn off pre-compiled headers in the project settings.
It needs to be the first include, you can't place it under other includes.
Your .cpp file is probably not in the same directory as pch.h
Try adding the directory that your pch.h is in to the additional includes, even if it is at the root of your project.
quick solution to a frustrating issue when trying to add .pch to an exisiting project:
if you have a /include /src dir structure, it might not work,
unless you place the "pch.h" and "pch.cpp" in the same dir /src.
Also: mark the "MyPreComp.cpp" as /Yc - create,
and in the .cpp files you want to use the .pch set them to Yu - use.
#include "pch.h" as the first #include in the .cpp
NB. You need to set "not using precompiled headers" to all .cpp files not using them,
yes, it IS a hassle.
( Visual Studio 2019 )
It needs to be included to each cpp file (by default)
It needs to be included in the very first line of your code (excluding the comments, it's ok to have the fancy comments on top)
It needs to be in a reachable directory. This error often happen when you have a folder structure in your project. So this can happen with a source files in some nested folder, when your precompile-header-file is up there in main. In this case, either add necessary number of "../" before the file name, or add the main folder to the "additional include directories" as it is already suggested above.
It needs to actually be the same precompile header file, that is set as the one in project setting. Check the file with "Precompiled Header" option set to "Create (/Yc)", ensure that it refers to he same header file, that you include ("pch.h" or "stdafx.h" by default) This error often happens when you include some old source to newer proj, or vice-versa, due to different default names in different studio versions: "stdafx.h" vs "pch.h".
If all above is set up, and you still have it, check if you actually set it up for the right build configuration. Always apply project setting change for all configurations. Costed me some nerves when I did it for only one config, and was trying to compile another:
I am a C# developer, and spoiled rotten when it comes to references and dependencies. I am working on a small project now in Visual C++ (Visuial Studio 2017), where I want to use the libtomcrypt and libtommath libraries. I've created a small project and added the 2 projects to my solution:
I have also added my includes:
And I added the dependencies:
However, I still can't build:
Error C1083 Cannot open include file: 'tomcrypt.h': No such file or directory
I am not sure what else I need to do to get the references working and the code to compile. Any pointers is appreciated!
The error message indicates that the compiler can't find the file tomcrypt.h while compiling one of your source files. From the message I would guess that you have a line like the following in your source file:
#include <tomcrypt.h>
(...or perhaps with quotes instead of brackets.) From your screenshot I can see that you've added "...\repos\libtomcrypt-develop\src\headers" to your include path. Is the file tomcrypt.h found directly in that folder, or is it perhaps in a subfolder instead?
Your #include directive will basically append whatever path you give it to each entry in your include path when looking for the file, so if there are subfolders in between, you'll have to expand your #include directive to include those folders.
If this doesn't solve your problem, perhaps try posting the actual full path of where this header file exists on your filesystem, as well as your complete include path value! (The full compiler command from the build log would be useful, as well as the complete error message(s) related to this source file.)
Edit:
The original poster posted a separate answer indicating that the actual problem was that the Visual Studio Project Properties were set correctly, but that he was accidentally trying to build a different Configuration. :(
I was building the project under x86. Once I changed it to x64, it built just fine.
I'm trying to write a program using flex++, however everytime I try to compile I receive the error message:
FlexLexer.h: No such file or directory
However that header is found on the include folder of flex. I don't have problems compiling lex programs for c, however for c++ with flex++ I can't seem to find a way.
I already downloaded flex various times and I don't know if there is a problem with my OS or something like that. My OS is Windows 10.
Thank you
Including should be pretty straightforward once you understand how it works.
Let's look at some different ways you can include a file:
#include "FlexLexer.h"
The quotes tell the compiler to look for the file FlexLexer.h in the same folder as the file being compiled. That is it, it won't look anywhere else.
Now if we change the quotes to brackets:
#include <FlexLexer.h>
This tells the compiler to look for FlexLexer.h in the same folder first, but then if it isn't found it will go through the list of include paths looking for it there, too.
Assuming you are using VisualStudio, there is both a system list of include paths (see Tools > Options > Projects and Solutions > VC++ Directories) and a project list of include paths (right click on the Project in the Solution Explorer, Properties > VC++ Directories). Both of these lists are traversed.
Finally, you can also add subdirectory qualifies to the include, e.g.:
#include "Win\FlexLexer.h"
or
#include <Win\FlexLexer.h>
As you might guess, it looks for the path under either the current directory in the both examples and also under the include path list in the later example. Regardless, the first time the file is found the search will stop and the compiler will use it. So be careful if there are headers will duplicate names in different libraries!
I am using visual studio 2005 to create a project. And I have folder structure in project as: a folder called code. this folder contains all *.cxx files.
Now, I have created a class xyz in header file xyz.h. And defined every thing in xyz.cxx which is placed in code folder.
But now when I try to compile it with visual studio it throws me an error
"fatal error C1083: Cannot open include file: 'xyz.h': No such file or directory". how to rectify this problem.
Add the "code" folder to the project properties within Visual Studio
Project->Properties->Configuration Properties->C/C++->Additional Include Directories
Either move the xyz.h file somewhere else so the preprocessor can find it, or else change the #include statement so the preprocessor finds it where it already is.
Where the preprocessor looks for included files is described here. One solution is to put the xyz.h file in a folder where the preprocessor is going to find it while following that search pattern.
Alternatively you can change the #include statement so that the preprocessor can find it. You tell us the xyz.cxx file is is in the 'code' folder but you don't tell us where you've put the xyz.h file. Let's say your file structure looks like this...
<some folder>\xyz.h
<some folder>\code\xyz.cxx
In that case the #include statement in xyz.cxx should look something like this..
#include "..\xyz.h"
On the other hand let's say your file structure looks like this...
<some folder>\include\xyz.h
<some folder>\code\xyz.cxx
In that case the #include statement in xyz.cxx should look something like this..
#include "..\include\xyz.h"
Update: On the other other hand as #In silico points out in the comments, if you are using #include <xyz.h> you should probably change it to #include "xyz.h"
I ran into this error in a different situation, posting the resolution for those arriving via search: from within Visual Studio, I had copied a file from one project and pasted into another. Turns out that creates a symbolic link, not an actual copy. Thus the project did not find the file in the current working directory as expected. When I made a physical copy instead, in Windows Explorer, suddenly #include "myfile.h" worked.
This problem can be easily solved by installing the following Individual components:
The following approach helped me.
Steps :
1.Go to the corresponding directory where the header file that is missing is located. (In my case,../include/unicode/coll.h was missing) and copy the directory location where the header file is located.(Copy till the include directory.)
2.Right click on your project in the Solution Explorer->Properties->Configuration Properties->VC++ Directories->Include Directories.
Paste the copied path here.
3.This solved my problem.I hope this helps !
I'm using VS2010 (downloaded via dreamspark) and although I can open the #include file by right clicking on it and pressing on Open Document, it complains "Error can not open source file "..."" which seems rather absurd. I'm using Qwt with Qt this time around and I'm specifically having the problem for:
#include <qwt_counter.h>
#include <qwt_plot.h>
(And I am using the "<>"); not sure how to make those appear properly in the code above.
Thanks in advance.
As Neil indicated, try using quotes instead of the <> characters around the filename. When using the quotes, MSVC will look in the same directory as the file the #include is in for the specified file, then if it's not found there will look in the directories specified by the include path. When the filename is surrounded by <> characters, the current file's directory isn't looked at - the compiler goes right to the include path.
See http://msdn.microsoft.com/en-us/library/36k2cdd4.aspx for details.
Note that this is an implementation dependent behavior - it might not apply to other compilers.
If that doesn't help, make sure that your include path contains the directory that the file is located in by setting the "Include Directories" property appropriately:
http://msdn.microsoft.com/en-us/library/t9az1d21.aspx
Finally, you might be using a makefile project (I'm not sure how common it is for Qt projects to continue to use qmake when built from VS) , in which case you'll need to perform whatever configuration is necessary in the make file(s) or parameters passed on the command line that invokes the makefiles.
Is the path where these files are located either the same as that of this source file, or included in the "additional include directories" in your project settings?
Project -> properties -> c/c++ section -> additional include directories.
If they are located in a subdirectory of the source file you're editing or of one of the additional include directories (I think) you can also include them with:
#include <path_to_file_1/qwt_counter.h>
#include <path_to_file_2/qwt_plot.h>
[edit]
or of course what neil says
[/edit]
It turned out there was a circular linking happening and I had all my code in a .h file. I split it up and added the corresponding .cpp file, now everything works fine.