I am trying to execute a cpp file named "palindrome.cpp" using terminal on my Macbook. This cpp file uses an external library named "libStanfordCPPLib.a" which lies under "DIRECTORY TO CPP FILE/StanfordCPPLib", also the corresponding header files of this library are in this "StanfordCPPLib" folder.
You can see the folder structure by this screenshot:
My code for compiling this source code is :
g++-4.8 -Wall -I/Users/myName/Downloads/CS106B/palindrome/StanfordCPPLib -L/Users/myName/Downloads/CS106B/palindrome/StanfordCPPLib palindrome.cpp libStanfordCPPLib.a
As I understand, -I stands for the directory path where header files exist, and -L stands for the directory path where library (.a file) exists. That's why both -I and -L are the same directory path "/Users/myName/Downloads/CS106B/palindrome/StanfordCPPLib".
However, executing this command returns an error saying :"libStanfordCPPLib.a: No such file or directory". As is shown in the screenshot:
Can anyone see why this happens? Thanks.
Try this, using -lStanfordCPPLib:
g++-4.8 -Wall -I/Users/myName/Downloads/CS106B/palindrome/StanfordCPPLib -L/Users/myName/Downloads/CS106B/palindrome/StanfordCPPLib palindrome.cpp -lStanfordCPPLib
Related
I have never used a package manager for C++ packages until today. I finally got one to semi work, called cget. I'm trying to use a package called nlohmann/json and from their documentation I just need to run cget install nlohmann/json. The issue is that this puts the include header files in the directory /cget/include/nlohmann which (I assume) the g++ compiler doesn't look in for headers. So I manually moved the nlohmann directory into the /usr/include directory. When I compile with g++ test.cpp -o test it fails with the error "No such file of directory". I clearly see the file in the include path, so what am I missing?
// test.cpp
#include <nlohmann/json.hpp>
I've tried using the Include flag g++ -I /usr/include test.cpp -o test and it still fails.
The path to the json.hpp file is /usr/include/nlohmann/json.hpp
When I run `g++ -print-prog-name=cc1plus` -v it gives:
#include "..." search starts here:
#include <...> search starts here:
/usr/include/c++/9
/usr/include/x86_64-linux-gnu/c++/9
/usr/include/c++/9/backward
/usr/lib/gcc/x86_64-linux-gnu/9/include
/usr/local/include
/usr/include
End of search list.
What is causing this error to persist?
I'm working on getting an example run for the audioCaffe framework http://multimedia-commons.s3-website-us-west-2.amazonaws.com/?prefix=tools/audioCaffe/
The root directory of this project contains an include directory.
Except, when I navigate to tools and compile g++ caffe.cpp it throws an error:
caffe.cpp:8:10: fatal error: 'caffe/caffe.hpp' file not found
note that include/caffe/caffe.hpp exists
Since you mentioned using g++ caffe.cpp I assume you execute this command form where caffe.cpp file is, which is:
audioCaffe/tools/caffe.cpp
The caffe.cpp file uses #include "caffe/caffe.hpp" which is in the include directory:
audioCaffe/include/caffe/caffe.hpp
So you will need to tell the compiler where to find the headers, you do this with the -I option. Compile it with the command:
g++ -I ../include caffe.cpp
I am new to C++ programming and trying to add a library (Yepp) to my cpp file.
I am trying to compile and it says it cannot find a header file from the external library. The external library, yeppp, has a .so file which I placed in a lib folder in the root directory.
I am building with the following command:
clang++ -O3 test.cpp -o test -L lib/ -lyeppp
Here's the error:
test.cpp:7:10: fatal error: 'yepCore.h' file not found
#include <yepCore.h>
You need to tell the compiler where to find the header file. Use the -I option.
I compiled the file (source.cpp) using the command
g++ -I/home/hrishikesh/Desktop/OGDF-snapshot/include -O2 source.cpp -o mytest -L/home/hrishikesh/Desktop/OGDF-snapshot/_release -lOGDF -lCOIN -pthread
and it got compiled successfully without giving any error message,resulting a file "mytest" in the same folder as the source.cpp in.
when I try to run the mytest file using command
./mytest
it shows this error message
./mytest: error while loading shared libraries: libOGDF.so: cannot open shared object file: No such file or directory
please help
You need to put libOGDF.so in the same folder than mytest
g++ -I /AbsolutePath/Desktop/OGDF/ main.cpp -L -l
/AbsolutePath/Desktop/OGDF/_release/libOGDF.a -lpthread
here main.cpp is the file.
copy and paste the line above in other text editors to get rid of the confusions between the usage of I and L and the spaces.
Be sure that you are writing the absolute path correct.
The a.out file will be generated in current directory. execute it by using:
./a.out
I want to use some other project libraries in my implementation. The project has a /common folder where the libraries are located I want to include. In my makefile under LDLIBSOPTIONS, I included the path where /common folder is located like:
LDLIBSOPTIONS=-lpci -lpthread -I../../../OtherProj/Libs/common/
Then I include one .h file like:
#include <ExampleLib.h>
However I still get
fatal error: XXX.h: No such file or directory
What am I doing wrong? Thanks.
LDLIBSOPTIONS (more conventionally LDFLAGS) is used for specifying options to the linker. You need to specify the directory, using the -I flag, in CXXFLAGS:
CXXFLAGS += -I../../../OtherProj/Libs/common/
However given you are using non-standard names for your Makefile variables, CXXFLAGS might be called something like CXXOPTIONS, but the exact name is unknown to me.
Once this is solved you're going to be getting linker errors until you start specifying the library path using -L; perhaps:
LDLIBSOPTIONS = -L../../../OtherProj/Libs/common/ -lpci -lpthread