I'm using ubuntu 12.03 and trying to use Symbolicc++ library, it is specified in it's README file that the program using this library should be compiled with command g++ -o program program.cpp -lsymbolicc++. I am wondering how can I enter the -lsymbolicc++ pastfix in the cmakelists.txt file and work on kdevelop?
If you already have program added as an executable to cmakelists.txt a'la;
add_executable(program program.cpp)
then you can just add
target_link_libraries(program symbolicc++)
to add that library when linking.
Related
I'm compiling a c++ program using g++ and i am using two libraries called libsdl2-dev and libsdl2-image-dev
I installed both these libraries in my ubuntu machine with the commands
apt install libsdl2-dev libsdl2-image-dev and when I compile the program everything works fine. Then I copied these libraries from /usr/lib/x86_64-linux-gnu/ to my working dir with the binary file to be able to give this folder to someone else.
The problem comes when the user that hasn't installed these libraries tries to open my program by writing ./main (the binary file). Since he hasn't installed these libraries he would get an error like "can't open shared object: no such file or directory".
This happens because the binary file looks for these libraries in /usr/lib etc...
What i need
I need that my binary file looks for these libraries in the same folder,and not in /usr/lib/x86 etc.., from what I read I have to do something like rpath
The IDE used is Sublime Text and the syntax used to compile all my files is this:
g++ -c src/*.cpp -std=c++14 -m64 -g -Wall -I include && g++ *.o -o bin/debug/main -lSDL2main -lSDL2 -lSDL2_image && ./bin/debug/main`
Structure of folders
I got the project dir with and inside that i got 4 more directories, each one called: bin (with the debug subdirectory, where we got the final compile), include (with hpp files), res (with all textures), and src with all cpp files to compile, the other files are project files and .o files
I'm using Ubuntu 20.04-2 LTS and the same is for the other user's PC
Thanks in advance for any help!
That's because the dynamic linker loading runtime dependencies looks for them in some specified locations, which are "by default" your system library directories (where those libraries got installed by apt).
The other user should ideally install those libraries too (which could be done "automatically" if you build a .deb package with proper dependencies)
Otherwise you would have to change the runpath of your program by adding -Wl,-rpath='$ORIGIN', which makes the dynamic linker look for dependencies just where the binary is located.
$ORIGIN here is a special variable meaning "this executable" which is what you wanted to achieve.
see rpath
and A description of RPATH $ORIGIN
I found a way to resolve!
I used the program patchelf to add an rpath to my directory (linked to the binary file) now everything works
use ldd ./bin/debug/main to check the library
export LD_LIBRARY_PATH =$LD_LIBRARY_PATH:"your library path"
run the program,if this is not work. use patchelf to change the rpath to you r library
I'm trying to link a game library for my game project in C++. I am using the g++ compiler and Atom Code Editor. Also on a Windows machine.
To link the library it needs to link those things:
Include path
Library path
Additional dependencies
The main.cpp file is at ProjectRoot/src/main.cpp and the library is at ProjectRoot/deps/lib_name
Inside the library there is and include folder, with the .h file for including, and a lib folder, with the .lib file. It's a static linking library.
So far, I've tried the following commands:
g++ -o ExecutableName.exe -I /deps/lib_name/include -L /deps/lib_name/lib src/main.cpp
Well, that didn't work though... It said that there was no such file or directory as library_name.h...
I need to know if I'm doing anything wrong and also how to specify the additional dependencies.
Every thing is correct . You just forgot to link the libraries . Do it as follows -
g++ -o ExecutableName.exe -I /deps/lib_name/include -L /deps/lib_name/lib src/main -l[library name] -l[library name]
I wrote a program that reads a GeoTiff file with GDAL. To compile it, I write:
g++ my_program.cpp -lgdal
However, I want to run this code with Clion. How do I add this -lgdal to the CMake file?
The -l is an indication to the linker to link the gdal library to your executable, so the corresponding CMake command is target_link_libraries(). So your CMake might look something like this:
add_executable(MyExecutable my_program.cpp)
target_link_libraries(MyExecutable PRIVATE gdal)
I am compiling my C++ project in the following way:
/usr/bin/i686-w64-mingw32-g++ -g -std=c++0x -Wall -I /home/bluszcz/dev/win64/SFML-2.1/include -L /home/bluszcz/dev/win64/SFML-2.1/lib -static-libgcc -static-libstdc++ -static -O4 -c src/game.cpp -o src/game.a -lsfml-graphics -lsfml-window -lsfml-system -lsfml-audio
However, when I try to run my exe file I am getting an error about missing DLL files:
bluszcz#zendo ~/dev/win32/builds/magicwizard $ wine mw.exe
err:module:import_dll Library libgcc_s_dw2-1.dll (which is needed by L"Z:\\home\\bluszcz\\dev\\win32\\builds\\magicwizard\\sfml-system-2.dll") not found
err:module:import_dll Library libgcc_s_sjlj-1.dll (which is needed by L"Z:\\home\\bluszcz\\dev\\win32\\builds\\magicwizard\\libstdc++-6.dll") not found
err:module:import_dll Library libwinpthread-1.dll (which is needed by L"Z:\\home\\bluszcz\\dev\\win32\\builds\\magicwizard\\libstdc++-6.dll") not found
err:module:import_dll Library libstdc++-6.dll (which is needed by L"Z:\\home\\bluszcz\\dev\\win32\\builds\\magicwizard\\sfml-system-2.dll") not found
err:module:import_dll Library sfml-system-2.dll (which is needed by L"Z:\\home\\bluszcz\\dev\\win32\\builds\\magicwizard\\sfml-audio-2.dll") not found
err:module:import_dll Library libgcc_s_dw2-1.dll (which is needed by L"Z:\\home\\bluszcz\\dev\\win32\\builds\\magicwizard\\sfml-audio-2.dll") not found
err:module:import_dll Library libgcc_s_sjlj-1.dll (which is needed by L"Z:\\home\\bluszcz\\dev\\win32\\builds\\magicwizard\\libstdc++-6.dll") not found
err:module:import_dll Library libwinpthread-1.dll (which is needed by L"Z:\\home\\bluszcz\\dev\\win32\\builds\\magicwizard\\libstdc++-6.dll") not found
err:module:import_dll Library libstdc++-6.dll (which is needed by L"Z:\\home\\bluszcz\\dev\\win32\\builds\\magicwizard\\sfml-audio-2.dll") not found
I have compiled using static options - so why it asks for libgcc_s_dw2-1.dll for example?
Also, I copied some files there, but the application still doesn't see them.
bluszcz#zendo ~/dev/win32/builds/magicwizard $ ls *dll
libsndfile-1.dll sfml-audio-2.dll sfml-graphics-d-2.dll sfml-system-2.dll sfml-window-d-2.dll
libstdc++-6.dll sfml-audio-d-2.dll sfml-network-2.dll sfml-system-d-2.dll
openal32.dll sfml-graphics-2.dll sfml-network-d-2.dll sfml-window-2.dll
bluszcz#zendo ~/dev/win32/builds/magicwizard $
And some files, like libgcc_s_dw2-1.dll, don't exist on my file system at all...
To summarize:
Why does my application not see the missing files?
How to compile in static way with mingw32?
How to get the missing files?
I use this version of sfml library to compile it: http://www.sfml-dev.org/download/sfml/2.1/SFML-2.1-windows-gcc-4.7-mingw-32bits.zip
The missing dll's can simply be added to your WINEPATH before running your program with wine, i.e.
export WINEPATH="/usr/x86_64-w64-mingw32/lib;/usr/lib/gcc/x86_64-w64-mingw32/7.3-posix"
!Note, your paths might be slightly different depending on the mingw version you are using.
Answering only the last of the three question:
About the standards libraries, it worked for me to copy them from the mingw folder:
cp /usr/lib/gcc/i686-w64-mingw32/5.3-win32/libstdc++-6.dll ./
However, when I copied from the wrong directory according to my build (e.g. /usr/lib/gcc/x86_64-w64-mingw32/5.3-posix/libstdc++-6.dll) I still had the same error while the file with the exact same name was here.
On my Fedora 26 after installing mingw64-gcc and mingw64-gcc-g++:
[leo#pc]$ locate libgcc_s_seh-1.dll
/usr/x86_64-w64-mingw32/sys-root/mingw/bin/libgcc_s_seh-1.dll
[leo#pc]$ locate libstdc++-6.dll
/usr/x86_64-w64-mingw32/sys-root/mingw/bin/libstdc++-6.dll
[leo#pc]$
If I copy dll's and run wine with generated a.out.exe it works.
Probably your application isn't seeing the files because it's configured like that, and you don't need to add tags like -static to the command.
For compiling static libraries, you must add -s, like -lsfml-window-s -lsfml-system-s
libgcc_s_dw2-1.dll is just inside bin folder, on latest MinGW releases.
If there are missing dlls, there's probably a version incompatibility.
I am trying to use amalgamated version of sqlite3.c and sqlite3.h in my C/C++ project. It has code in both C and C++. I am using eclipse IDE in UBUNTU 12.04.
Now my problem is that after having include sqlite3.h in my file where I need sqlite3.c functions and having added ld and pthread libraries in linker, i am still getting errors and cant build the project.
This is weird and should not happen. Please take a look at following screenshots that explain my problem.
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What am I missing?
Please Help!
Thanks
Make sure that the pthread library is linked before the dl library.
In other words, your compiler command (as generated by Eclipse) should be:
gcc shell.c sqlite3.c -lpthread -ldl
and not
gcc shell.c sqlite3.c -ldl -lpthread
See here for a correct command line:
http://www.sqlite.org/howtocompile.html