I am trying to compile an existing C++ project but get this error:
fatal error C1083: Cannot open include file: 'occi.h': No such file or directory
What I did is I went to this link:
http://www.oracle.com/technetwork/topics/winsoft-085727.html
and downloaded the first (basic) package.
Then unzipped the folder and modified PATH variable like this:
C:\Program Files\Atmel\sam-ba_2.12\drv\;C:\Program Files\Atmel\sam-ba_2.12;C:\Program Files\ATMEL Corporation\AT91-ISP v1.4\Library;C:\MSYS\1.0\bin;C:\MSYS\1.0\local\bin;C:\cygnus\cygwin-b20\H-i586-cygwin32\bin;D:\instantclient_12_1
last being path to oracle.
But I still get the error, can someone help?
PS I noticed in my project there are lines like:
#include "occi.h"
Maybe it is because of this?
The basic package isn't enough. Its description says "All files required to run OCI, OCCI, and JDBC-OCI application" (emphasis added); with just that you can run an OCI program, but you can't compile one. You need to download other instant client components. Specifically for the occi.h header you need the fifth file listed:
*Instant Client Package - SDK: Additional header files and an example makefile for developing Oracle applications with Instant Client
If you download and unzip that in the same place you unzipped the basic package, your instant client directory will gain an sdk folder, which includes all the OCI header files.
You'll then need to compile with -I D:\instantclient_12_1\sdk\include so your compiler knows where to look for the occi.h and other header files. You may also need -L to tell it where to find the Oracle libraries; presumably you already have -lclntsh and/or -locci, which refer to libraries you should have already from the basic package.
Related
I've been testing some stuff in Visual Studio after some time not working with VS, And I ran into a problem where I include a file and I get this error:
Cannot open include file 'spdlog/spdlog.h': No such file or directory
but I have the right path, in Project settings I have the right path set as an additional Include directory and the file is there. but the Thing is, when I take the file and move it one directory up and change the include path so that it now points one directory up (where the file is now) it suddenly works. Example:
File Path: Project/lib/spdlog/spdlog.h
Include directory: Project/lib
this Works
File Path: Project/lib/spdlog/spdlog/spdlog.h
Include directory: Project/lib/spdlog
This doesn't work
I don't want to include the lib directory since I have more libraries in it and it would just mess some stuff up, so I want to include every library (like spdlog for instance) separately. Does anyone know what might be causing the issue ? Also the error isn't shown when writing the code only when I try to build the Project.
Maybe you are missing spdlog library.
I suggest you check out this issue.
For debian-like distros you should be able to download it via apt-get: apt-get install libspdlog-dev.
I am beginner-programmer and I wanted to run a code which includes “Eigen/Dense” library. However, I could not add this library into the Visual Studio Code (VSC). I followed the following instruction, but it did not work.
• Open command panel (Shift+CMD+P on OSX or Shift+Ctrl+P on Windows and Linux).
• Search for 'Extlibraries: Add external library' and press Intro.
• Input external directory or file path (here I entered the path of Eigen directory which I download from its website).
• Input name and press Intro (here I entered Eigen)
Could you please help me with this problem? I am waiting for your responses.
Thank you
Eigen is a header only library. That means that there is no library binary that needs to be linked. As such, you just have to make sure that the Eigen directory is correctly placed in your include paths. So, if you have the Eigen/Dense file is located at C:\some\path\to\Eigen\Dense, then the included path needs to be C:\some\path\to\.
I'm trying to use tensorflow as a external library in my C++ application (mainly following this tutorial). What I done so far:
I have cloned the tensorflow reporitory (let's say, that the repo root dir is $TENSORFLOW)
Run /.configure (which all settings default, so no CUDA, no OpenCL etc.).
Build shared library with bazel build -c /opt //tensorflow:libtensorflow_cc.so (build completed successfully)
Now I'm trying to #include "tensorflow/core/public/session.h". But after including it (and adding $TENSORFLOW and $TENSORFLOW/bazel-genfiles to include path), I'm receiving error:
$TENSORFLOW/tensorflow/third_party/eigen3/unsupported/Eigen/CXX11/Tensor:1:42:
fatal error: unsupported/Eigen/CXX11/Tensor: No such file or directory
There is a github issue created for similar problem, but it's marked as closed without any solution provided. Also I tried with master branch as well as v.1.4.0 release.
Do you happen to know, what could cause this kind of problem and how to deal with it?
I (and many others) agonized over the same problem. It probably can be solved using bazel but I don't know that tool well enough and now I solve this using make. The source of confusion is that a file named Tensor is included and it itself includes a file named Tensor, which has caused some people to wrongly conclude Tensor is including itself.
If you built and installed the python .whl file there will be a tensorflow directory in dist-packages and an include directory below that, e.g. on my system:
/usr/local/lib/python2.7/dist-packages/tensorflow/include
From the include directory
find . -type f -name 'Tensor' -print
./third_party/eigen3/unsupported/Eigen/CXX11/Tensor
./external/eigen_archive/unsupported/Eigen/CXX11/Tensor
The first one has
#include "unsupported/Eigen/CXX11/Tensor"
and the file that should satisfy this is the second one.
So to compile session.cc that includes session.h, the following will work
INC_TENS1=/usr/local/lib/python2.7/dist-packages/tensorflow/include/
INC_TENS2=${INC_TENS1}external/eigen_archive/
gcc -c -std=c++11 -I $INC_TENS1 -I $INC_TENS2 session.cc
I've seen claims that you must build apps from the tensorflow tree and you must use bazel. However, I believe all the header files you need are in dist-packages/tensorflow/include and at least for starters you can construct makefile or cmake projects.
Slightly off-topic, but I had the same error with a C++ project using opencv-4.5.5 and compiled with Visual Studio (no problem with opencv-4.3.0, and no problem with MinGW).
To make it work, I had to add to my root CMakeLists.txt:
add_definitions(-DOPENCV_DISABLE_EIGEN_TENSOR_SUPPORT)
If that can help someone...
the problem was actually in the relative path of the header file taken in the Tensor file.
installed path for Tensor is /usr/include/eigen3/unsupported/Eigen/CXX11/Tensor
but mentioned in the Tensor file is "unsupported/Eigen/CXX11/Tensor"
So there should be an entry upto /usr/include/eigen3/ in the project path to run this correctly so that it can be used.
I am a "very" beginner of OpenCV. I just downloaded it for my Windows and extracted.
I have read this post: http://opencv-srf.blogspot.ro/2011/09/capturing-images-videos.html about how to read webcam and I copied and pasted the code in a C++ file I created in "include" folder of OpenCV extracted archive.
When I try to run the program I get this error: Error in: /opencv/build/include/opencv2/highgui/highgui.hpp - opencv2/highgui.hpp: No such file or directory.
What should I do?
Thank you all!
EDIT
I opened: "/opencv/build/include/opencv2/highgui/highgui.hpp" and I can see that it includes this path "opencv2/highgui.hpp". If I change it to "../highgui.hpp" it works but I get other errors like this for other files... What should I do?
The problem is that you are not supposed to create your "cpp" file in the OpenCV "include" directory. You need to create it in a separate directory and then add OpenCV "include" as additional include directory for the compilation step.
The way to achieve this depends on your C++ development environment. If you are using Visual Studio, then you need to open project property pages, go to "C/C++ -> General" and add the path to OpenCV "include" directory to "Additional Include Directories". In case of some other compiler/IDE, you can find out how to do this by reading the corresponding documentation.
I'm a complete beginner with Code::Blocks and SQLite, and have some basic knowledge with C++. I'm currently using Ubuntu 11.04.
I have downloaded SQLite Amalgamation here. When I extracted the zip file, there are four files inside: shell.c, sqlite3.c, sqlite3.h, and sqlite3ext.h. If I simply add those files to a (for example) a console project, it gives out an error: the .c's of the downloaded sqlite each have their own main function. Removing those from the project, the errors are gone and I can call #include "sqlite3.h". I am trying to follow this, and tried the first two lines of code from here and it gives out an error: undefined reference to sqlite3_open.
I think adding those .h's directly to a console project isn't the right way to use it, though I'm not sure.
How exactly should I use those? What should I do to use those for my C++ program?
Any help is greatly appreciated. :)
EDIT: I also tried to create a .a file of those sqlite files by following this. When I try it, it gives out an error: cannot find -lsqlite.
I got it! Though there was something that I did that caused problems.. I forget to remove the .a file that I added at Project > Build Options > Linker Settings earlier, which caused problems..
Here are the steps I made to add SQLite: (for those that might have the same problems)
Copy the files extracted from the SQLite Amalgamation to the directory of the project.
Add the sqlite files (Project > Add Files) EXCEPT the shell.c (it is the one that causes the multiple function error)
Compile it (Yes, a simple Ctrl+f9).
here are errors: undefined reference to pthread_mutexattr..... These are fixed by going to Project > Build Options > Highlight 'the Project Name' above Debug and Release at the top left corner > Linker settings, and adding "-lpthread" (without quotes) to Other linker options:.
Some more errors are found: undefined reference to dlopen, dlerror..... Add '"-ldl"' just below the '"-lpthread"' added earlier.
DONE :)
I didn't find a complete answer for Windows as a beginner, and at the beginning it is very painful to understand everything. So here's what worked for me.
Download the SQlite Amalgamation file.
Open Code::Blocks -> New Project -> Choose static library
Unzip the file you have downloaded and copy the folder/contents to your new project directory. Add all the files to the project and build the project.
You will find a ProjectName.a file in the bin/Debug or bin/Release directory. Copy that file to your actual SQlite project directory.
Go to Code::Blocks Project->Build options. Select 'Linker Settings' tab and add the path to the .a file. Don't close it yet!!!
In 'Search Directories' tab, select the 'Compiler' tab, add the path to the Amalgamation header files, or copy the header files to your directory (you can add the header files to your project) and in the 'Linker' tab add the path to the .a file
Now Compile!!! Hopefully this will run
That is all, I wish it'll save some searching time for another noob
You will need to compile the sqlite code first, and then just #include "sqlite3.h" into your project where you need it.
UPD:
Try this:
Download this package from sqlite site and extract it somewhere, say, into a folder called "sqlite". Open terminal, and go into this folder. Inside of it, run
./configure
sudo make
sudo make install
and see what happens. It should build itself automatically. Consult the README file that is inside the archive too.