I am attempting to import a C++ Game Server project into Xcode.
But I am running into the following error:
'uWS/uWS.h' file not found in XCode
I have tried importing the library by dragging it into the project, and ran the following commands to compile the uWebSockets library in Terminal:
git clone https://github.com/uNetworking/uWebSockets
cd uWebSockets
make
sudo make install
cd ..
But am running into this error. I have tried to search for how to resolve this is issue for a couple of hours, but still can't figure it out.
XCode Error
Here is my project hierarchy, I have tried to import/add the library in various different ways:
Project Hierarchy
Prior to using XCode, I would compile my code through terminal by running the following command:
g++ -O3 -L/usr/lib64 -std=c++14 src/main.cpp -pthread -lz -luWS -lssl -luv -o main
Any help would be highly appreciated.
Related
Im currently trying to compile a cpp program with gcc that uses SDL2 library, and im using Ubuntu 20.04 LTS. Here is my folder structure
project
-out
-SDL2
-src
-main.cpp
Excluding the library i have uploaded everything to this repo https://github.com/probottpric/libtest if it gives a better understanding.
To install SDL2, I installed source code and ran ./configure and make all. I dont want to run make install which installs it on /usr/*. I want the library to be on the local folder.
To compile program im using this command
gcc -o ./out/main ./src/main.cpp -ISDL2 -lSDL2 -lSDL2main -lm -std=c++11
But It shows library not found error. What am i doing wrong ?
I have 2 cpp files(with one main function) in /home/misha/proga/c++again folder. I built C/C++: g++ build active task and modified it to compile all files in the folder above. Now, I need to add one more task to call a binary. I think I should add one more entry in "tasks" to finally be able to run a code. Where can I read about how to write this second task? I am new to programming. Is my approach correct to run this code contained in two files? I also do not know where this binary lies. Is it tasks file in .vscode folder ?
I use Ubuntu 19.10 and VSC 1.46.1
In Terminal,
cd /home/misha/proga/c++again
Let's suppose your two cpp files are mainFile.cpp and file2.cpp
If g++ (so GCC) was not installed in your system, you can install it by running this command on the Terminal:
sudo apt-get install gcc g++
and, to compile the program (read about invoking GCC, you want warnings and debug information), write this command into the Terminal:
g++ -Wall -g mainFile.cpp file2.cpp -o yourprog
Then, you can run the program by typing:
./yourprog
It should work now. You could need to use the GDB debugger and GNU make (to be installed with sudo apt-get install gdb make)
Read also some C++ programming book and this C++ reference.
I do not understand your approach usualy your create a makefile and compile your cpp files
g++ -g -c -fpic -o name.o
at the end you link them
g++ name.o 2name.o and so on
If you create binarys you should store them in /usr/lib
and the name should libname.so you can acces them by using the -l argument
I'm getting an ld error when attempting to compile an sfml program on ubuntu 16.04. This is apparently a known issue, and there is supposed to be a workaround, but I don't understand what is it...
http://web.archive.org/web/20160509014317/https://gitlab.peach-bun.com/pinion/SFML/commit/3383b4a472f0bd16a8161fb8760cd3e6333f1782.patch
The error spat out by ld is
hidden symbol `__cpu_model' in /usr/lib/gcc/x86_64-linux-gnu/4.9/libgcc.a(cpuinfo.o) is referenced by DSO
There is no relevant code to this - as I understand it this error is produced on all ubuntu 16.04 systems with g++ 5, if the program to be linked contains objects such as sf::Texture and sf::Sprite. (I don't know any more detail than this.)
I have tried also compiling with g++ 4.9, but the same error occurs.
My compile line is g++-4.9 --std=c++11 -Wall main.cpp -lsfml-graphics -lsfml-window -lsfml-system -o a.out
Has anyone else experienced this error and resolved it successfully?
I've had to fix this issue several times. Instead of applying the patch, you can manually fix it by editing the file SFML/src/SFML/Graphics/CMakeLists.txt. At line 149, you will find the following:
if(SFML_COMPILER_GCC)
set_source_files_properties(${SRCROOT}/ImageLoader.cpp PROPERTIES COMPILE_FLAGS -fno-strict-aliasing)
endif()
After the endif(), insert the following:
if(SFML_COMPILER_GCC AND BUILD_SHARED_LIBS)
list(APPEND GRAPHICS_EXT_LIBS "-lgcc_s -lgcc")
endif()
Then, in the top-level SFML folder, run the following:
mkdir build && cd build
cmake .. -DSFML_BUILD_EXAMPLES=ON -DSFML_BUILD_DOCS=ON
make
sudo make install
sudo ldconfig
This will get it built and installed without the compiler error. (Note: Remove the -D flags from cmake if you don't want docs or examples)
I ran this in the SFML source directory before running the standard cmake...make:
curl https://gitlab.peach-bun.com/pinion/SFML/commit/3383b4a472f0bd16a8161fb8760cd3e6333f1782.patch \
| patch -p1
and that solved the problem
I've got the same linker error when trying to build SFML 2.4.2 with examples, specifically with opengl and shader ones.
Inspired by the #Joshua solution, I tried to change the compiler from GCC to Clang. It worked.
I am sharing here because it seems to be a simpler solution if you have no restrictions to use Clang.
Just download SFML and change to its directory. And...
mkdir build && cd build
cmake .. -DSFML_BUILD_EXAMPLES=ON -DCMAKE_CXX_COMPILER=clang++
make
sudo make install
sudo ldconfig
Removing -fvisibility=hidden from compiler options worked for me.
Installed cygwin64, including Python 2.7, on my new computer running Windows10.
Python runs fine, adding modules like matplotlib or bitstream goes fine, but when trying to add scipy the build eventually, after about an hour, having successfully compiled lots of fortran and C/C++ files, fails with:
error: Setup script exited with error: Command "g++ -fno-strict-aliasing -ggdb -O2 -pipe -Wimplicit-function-declaration -fdebug-prefix-map=/usr/src/ports/python/python-2.7.10-1.x86_64/build=/usr/src/debug/python-2.7.10-1 -fdebug-prefix-map=/usr/src/ports/python/python-2.7.10-1.x86_64/src/Python-2.7.10=/usr/src/debug/python-2.7.10-1 -DNDEBUG -g -fwrapv -O3 -Wall -I/usr/include/python2.7 -I/usr/lib/python2.7/site-packages/numpy/core/include -Iscipy/spatial/ckdtree/src -I/usr/lib/python2.7/site-packages/numpy/core/include -I/usr/include/python2.7 -c scipy/spatial/ckdtree/src/ckdtree_query.cxx -o build/temp.cygwin-2.2.1-x86_64-2.7/scipy/spatial/ckdtree/src/ckdtree_query.o" failed with exit status 1
I've tried both pip install and easy_install, both result in the same error.
Greatful for any hints on what to try next.
I suffered for days with the same issue. My final solution was to install scipy0.15.1: pip install scipy==0.15.1. Hope it works for you too.
I found this while looking for a solution to the same problem but I could not downgrade to 0.15.1 as suggested because of 1.16 dependencies.
The problem is related to infinity having been defined twice in the official v0.16.1 but it only seems to cause issues for a couple platforms.
It was fixed in this commit. https://github.com/scipy/scipy/commit/832baa20f0b5
You should be able to download and compile the master branch from here on cygwin: https://github.com/scipy/scipy
I just finished installing numpy,scipy,scikit-learn,theano on cygwin.
I'm trying to call R from c++ on linux via RInside, I compiled R-2.15.1 from source with gcc version 4.5.3 (Debian 4.5.3-1) , I don't have sudo rights to use apt-get install. I'm using OpenBlas and a system optimized lapack. The blas and lapack libraries work fine for many scalapack applications
I installed R with
./configure --with-blas="-I/lib/OpenBLAS-v0.2.3-0/xianyi-OpenBLAS-48f075c/install/include -L/lib/OpenBLAS-v0.2.3-0/xianyi-OpenBLAS-48f075c/install/lib -lopenblas -lgfortran" --with-lapack="/usr/lib/liblapack.so -lgfortran" --enable-BLAS-shlib=yes --enable-R-shlib --enable-R-static-lib --prefix= .
which installed and runs fine,I ran make check with no errors, also all the packages (Rcpp and RInside) installed fine..
however when i use the given RInside makefile , the basic hello world example from /standard/rinside_sample0.cpp compiles! but it does not run and i get the following error
./rinside_sample0: error while loading shared libraries: libRblas.so: cannot open shared object file: No such file or directory
the file libRblas.so exists and is in the R/lib folder,
when i try to link it manually with the g++ command the make file creates or linking as follows i get a segmentation fault
/R/lib/libRblas.so ./hello_world
Segmentation fault
EDIT: heres how the example make file tries to compile an example, (which compiles fine) but won't run with the above missing libRblas.so error
g++ -I/nfs/user03/jimmie21/libs/lib64/R/include -I/nfs/user03/jimmie21/libs/lib64/R/library/Rcpp/include -I/nfs/user03/jimmie21/libs/lib64/R/library/RInside/include -g -O2 -Wall -I/usr/local/include hello_world.cpp -L/nfs/user03/jimmie21/libs/lib64/R/lib -lR -L/nfs/user03/jimmie21/libs/lib64/R/lib -lRblas -L/nfs/user03/jimmie21/libs/lib64/R/lib -lRlapack -L/nfs/user03/jimmie21/libs/lib64/R/lib -lRblas -L/nfs/user03/jimmie21/libs/lib64/R/library/Rcpp/lib -lRcpp -Wl,-rpath,/nfs/user03/jimmie21/libs/lib64/R/library/Rcpp/lib -L/nfs/user03/jimmie21/libs/lib64/R/library/RInside/lib -lRInside -Wl,-rpath,/nfs/user03/jimmie21/libs/lib64/R/library/RInside/lib -o hello_world
Couple of things:
Reproducible examples, please
You have a non-standard setup
With the script from 1), try it on a standard setting as that is how Rcpp / RInside get developed and tested (on Ubuntu / Debian)
The Rcpp test suite now contains almost 800 unit tests from around 350 unit test functions. These do not seg.fault, so the issue is at your end. Similarly, RInside has dozens of examples in the four examples/ subdirectories. This also works.
It may be as easy as tweaking the Makefile / Makevars files to make sure you get your libraries in all cases. But we can't tell as there is nothing reproducible here.
Edit If you want to link with libRblas.so then you have a completely non-standard setup as the R packages for Debian / Ubuntu as use the external BLAS. Again, not an RInside issue.
I fixed the problem by adding the R install path lib ../R/lib: to the beginning of LD_LIBRARY_PATH after that all the examples compiled and run fine