I have a library, libnoise to be specific, with header files installed under D:\src\include\noise\*.h
In my code which uses the library I have #include <noise/noise.h>
In the configuration properties for the project I have tried adding D:\src\include to both Include Directories and Additional Include Directories. When I check the generated command line it includes the flag /I"D:\src\include" as expected, however both Intellisense and the compiler itself report that they can't find the file.
I'm quite sure I'm missing something really stupid and obvious, but as you may have guessed I'm new to Microsoft compilers.
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I just installed visual studio 22 and I'm learning c++ but I keep seeing this error-E1696 cannot open source file "stdafx.h". Why is that so?
I haven't exactly tried anything since I don't really know what to do.
To my knowledge it a pre-compiled header file, It helps in speeding up the C++ application. Notice the double quotes "" over there that means it is a user added header file generally headers will be in <> and for user added header file #include"location of the header file" stdafx is generally added by the compiler in a default project location and for an empty project the compiler wont create any files at all so you need to add New Item(Header file) with the name of stdafx.h to make the application work for you. Remember this will not speed up the C++ application.
I've created a managed C++ log parser application using C++ vectors and Winforms. I want to add multithreading and Boost seemed like a better option than Winforms BackgroundWorker because I want to be able to execute my existing C++ function with each thread. I installed Boost multiple times following multiple different tutorials (lastly this one: https://levelup.gitconnected.com/the-definite-guide-on-compiling-and-linking-boost-c-libraries-for-visual-studio-projects-c79464d7282d) and I still have the same issue when I try to #include <boost/thread.hpp>
Error LNK1104 cannot open file 'libboost_thread-vc143-mt-x64-1_78.lib'
I don't know why it's looking for this library when I have Boost 1_79 installed not 1_78. My .lib file also has "mt-gd-x64" not just "mt-x64". I've already specified the correct file path to the library in Project->Properties->Linker->General->Additional Library Directories. I've also tried installing Boost via Visual Studio 2022 NuGet Package Manager. The lib file in that folder is also slightly off. "vc120" instead of "vc143". I've even tried changing the .lib file name to match the file name in the linker error exactly but when I do that I get more errors like LNK1104 cannot open file 'libboost_chrono-vc143-mt-x64-1_78.lib'
Do I just need to delete all my Boost files and download version 1_78 and try again? Why is Visual Studio looking for the wrong file name when it compiles? Is my #include statement wrong?
I ended up solving this problem by downloading boost 1_78, building it, and specifying that folder instead or the 1_79 folder. If anyone might know why the program was looking for 1_78 instead of 1_79 feel free to respond Also big thanks to George Gkasdrogkas who wrote the tutorial that worked best for me on how to install Boost. Tutorial is linked in the question :)
I am pretty experienced writing my own code, but not in C++. I am used to adding .NET assembly references, and I want to get into using C++.
I downloaded a VC++ 6 project presenting a graph algorithm, opened it in Visual Studio 2010 Ultimate and downloaded the required libraries (LEDA .NET assemblies) however, they came with both DLLs and LIB so I thought I would have no problems with the .NET and C++ connection. Also, the LEDA project comes with C++ style .header files, and static libraries, yet frustration persists.
I put my LEDA header files in a directory visible to the project, since I can "Go to definition" of all the custom LEDA data types and see where they are defined in the LEDA include files.
But, I can not compile/link these data types in. The VS finds their very existence repulsive, and refuses to acknowledge they could possibly be found in leda.lib.
Steps I have already taken:
Added additional /LIBPATH path under Properties ->Linker->General
Added explicit lib references under Properties->Linker->Input
Added all the paths containing LEDA header files and libraries to every path location I can find, like include path, reference path, library path.
Copied the DLLs and LIBs to the release folder as well as the base folder of the project.
Added a #pragma comment( lib, "leda" )
Still no joy.
It's quite bad since none of the custom typedefs are recognised the errors balloon to 646 errors.
If anyone is kind enough to offer assistance, thank you.
I can't guarantee this will work but try the following steps (therefore using it's default predefined paths instead of setting your own ones) :
1) Copy *.dll into Windows/System32 or / and (there is some confusion about x64 and x32 default checking in my head :)) Windows/SysWOW64.
2) Copy *.h files into x:\PathToVC2010\include\
3) Copy *.lib files into x:\PathToVC2010\lib\
I am banging my head against a wall here.
All i want is to link a static .lib file in a cpp windows forms application! So, i have an include folder in my project folder that holds header files for that .lib (lib is Yaml-cpp if someone wonders). And i have a lib folder that has the .lib files for that library.
I tested it on a blank project
1.I make a new windows forms project in VS2008, in C++.
2.I go to project properties - c/c++ general and additional include directories that have yaml-cpp header files
3.I go to linker and add path to my lib directory
4.I go to linker - input and add my .lib file
5.I check linker command line and it contains my .lib file so it must be all set.
6.Then i write the sample code in an onbutton function body (which appears in form1.h fie).
Sample code is from here http://code.google.com/p/yaml-cpp/wiki/HowToParseADocument and its just as simple as:
#include <fstream>
#include "yaml.h"
and then:
std::ifstream fin("test.yaml");
YAML::Parser parser(fin);
YAML::Node doc;
while(parser.GetNextDocument(doc)) {
//do nothing yet
}
7.And then i compile and have 10 "unresolved externals".
I have looked into another project that uses same library, and it has exactly same directory structure, same name of .lib added in linker - input - additional dependencies, same .lib and .h files. And it works for that project- but it doesnt work for me.
What in the world is wrong?
EDIT: I tried making new windows 32 console application and it worked correctly. I then tried to make another fresh windows forms application and it failed.
It is confirmed now. Same steps for linking a library work in console application and fail in windows forms application. WHY?
What you've done seems correct from your explanation, let's do some blind troubleshooting.
Try giving full path instead of relative path for library path and additional include directories. (but as u said that the file is getting read, that should be the problem.)
If you are using a copy of original libyaml-cppmdd.lib and its include file, check whether the header file that gets included is of the same version as the lib.
Check whether there are any functions in any part of the code that is having a declaration but no definition.
Check whether you're accessing any private functions from the library.
Please read this Microsoft article on Troubleshooting UnResolved External Symbol error.
Hope it helps!
I am trying to upgrade an old solution to use VS2010 (VC100).
I have it setup so that stdafx.cpp will create a precompiled header stdafx.pch from stdafx.h. Then all the other .cpp files that include stdafx.h are instructed to use the precompiled header.
These posts helped me get this far:
Visual C++ Precompiled Headers errors
Precompiled Headers
Now all is fine when I build in release mode. However when I try and build in debug mode I get a whole heap of errors saying:
Error 1 error C2859: [removed]\debug\vc100.idb is not the idb file that was used when this precompiled header was created, recreate the precompiled header.
I believe that this .idb file is an intermediate debug file created by Visual Studio.
Why am I getting this error? In other words why did it not use this .idb file when it created the precompiled header?
I'm not sure what further information you need to be able to give me answer so just ask if there is more information that I need to provide.
Thanks to a colleague I got the answer.
The problem was that stdafx.cpp had Debug Information Format set to Program Database (/Zi) where as all the other files had it set to Program Database for Edit and Continue (/ZI).
Changing them all to Program Database for Edit and Continue (/ZI) and doing a full rebuild solved the problem.
I guess the upgrade screwed it up somehow.
I've hit this error with VS2005 when compiling a project where the $(ProjectName) is different from the actual output file of the project (i.e. Linker > Output File isn't set to the default of $(OutDir)\$(ProjectName).exe but to something else, e.g. $(OutDir)\$(ProjectName)-custom_postfix.exe)
In this case, and apparently only when doing a Rebuild-Project-Only, the vc80.pdb seems to be looked up wrongly.
What helped me was to additionally set C/C++ > Output Files > Progam Database File Name to $(IntDir)\$(TargetName).pdb. (Instead of the default vc80.pdb)
select Disable for the Debug Information Format in the Properties page for stdafx.cpp, then go back and select Inherit from parent worked for me.
Maybe your release build is configured to write file [removed]\debug\vc100.idb instead of [removed]\release\vc100.idb? Check the project settings for your release build and make sure there are no hardcoded path components like that.
Here's how I just fixed this error on Visual Studio 2008:
Background:
I have a solution that contains two sub-projects.
One project compiles the .dll;
One project compiles the .exe that used this .dll;
The .exe project is dependent on the .dll project;
Problem: I had both of the projects dumping their output into the same directory, i.e. both "OutPutDirectory" and "IntermediateDirectory" set to write to a common directory in the root, "../$(ConfigurationName)".
Cause of error:
The cause of this error was that when the .dll project was compiled, it created the precompiled header (*.pch) in the same directory as the .exe directory, and when the .exe project was compiled, it promptly overwrote the precompiled header (*.pch) from the .dll project.
The fix:
To fix this, I changed the "IntermediateDirectory" for both sub-projects to "temp", so that the temporary files (including the precompiled header files) were written to different directories.