I'm trying to link the mysql native API to my server software now... With little luck. When compiling in Xcode on OSX10.9 using the flags
$(OTHER_CFLAGS) -I /usr/local/boost_1_55_0/ -I
/usr/local/mysqlconn/include/ -I /usr/local/mysqlconn/lib/
I get the compiler/linker error:
Undefined symbols for architecture x86_64:
"sql::mysql::get_driver_instance()", referenced from:
sql::mysql::get_mysql_driver_instance() in SQLComm.o ld: symbol(s) not found for architecture x86_64 clang: error: linker
command failed with exit code 1 (use -v to see invocation)
I really have no idea why though. The API files were downloaded by me today, and extracted at the included paths. I include all the files from include and include/cppconn in the server program that uses the function the linker cannot found.
Any ideas what I am doing wrong?
I see you configuring include directories, but I don't see any libraries listed there.
You need to link in the library when you build your project.
Related
Basic Info:
system: macOS High Sierra(10.13.6)
editor : vs code(latest version)
Compiler: g++ (Xcode)
Target：deploy GLFW + GLAD
Question Description:
Recently, I'm learning to do some Computer Graphics related work. Everything is going smooth. However, when i create a window to test the env.Link error happened:
Undefined symbols for architecture x86_64:
"_gladLoadGLLoader", referenced from:
_main in main-5c211c.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
The terminal process terminated with exit code: 1
It seems I have not link some third party file. I
have fixed exactly the same problem by add "-lglfw" args to g++ when using functions in glfw3.h.
But when meeting glad related function : gladLoadGLLoader, I don't know how to do.
Something I have done:
Can find the head file.
#include glad/glad.h
#include GLFW/glfw3.h
Have put the file "glad.c" in workspace.
Try to Add "g++ -framework XXXXX" , But doesn't work.
Try to Add "g++ -lglfw3", But doesn't work.
Add "g++ -L or I /usr/lib or /usr/local/lib or /usr/local/include", But doesn't work.
Just tell the g++ to compile glad.c by adding "glad.c" to args. I thought glad.c will be compiled by default. Although I am not clear what happened, the problem is resolved anyway.
Add glad.c into Build Phases->Compile Sources
I am trying to run a C++ project which has also dependence to PBC (https://crypto.stanford.edu/pbc/) and GMP (https://gmplib.org). I have installed PBC and GMP in the /usr/local/ directory. For this project I added the PBC (pbc-0.5.14) and GMP (gmp-6.1.0) libraries manually (I dragged those libraries into my project).
When I add the -lgmp -lgmpxx flags into Other linker flags in Xcode (Version 7.2) I got this:
ld: library not found for -lgmp
clang: error: linker command failed with exit code 1 (use -v to see invocation)
When I build (and clean) without Other linker flags I got:
Undefined symbols for architecture x86_64:
"_pairing_clear", referenced from:
Member::~Member() in member.o
Manager::~Manager() in manager.o
Verifier::~Verifier() in verifier.o
"_pairing_init_set_str", referenced from:
Member::Member() in member.o
Manager::Manager() in manager.o
Verifier::Verifier() in verifier.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
Did anyone know how to fix this issue or any suggestions?
Thanks.
On my Ubuntu 15.10(64), libgmp installed into
> /usr/lib/i386-linux-gnu/libgmp.so.10
> /usr/lib/i386-linux-gnu/libgmp.so.10.2.0
> /usr/lib/i386-linux-gnu/openssl-1.0.0/engines/libgmp.so
> /usr/lib/x86_64-linux-gnu/libgmp.a /usr/lib/x86_64-linux-gnu/libgmp.so
> /usr/lib/x86_64-linux-gnu/libgmp.so.10
> /usr/lib/x86_64-linux-gnu/libgmp.so.10.2.0
> /usr/lib/x86_64-linux-gnu/libgmpxx.a
> /usr/lib/x86_64-linux-gnu/libgmpxx.so
> /usr/lib/x86_64-linux-gnu/libgmpxx.so.4
> /usr/lib/x86_64-linux-gnu/libgmpxx.so.4.4.0
I found this using command "locate libgmp". (locate searches what updatedb updates.)
You say you 'installed' it locally? I ran install without any options. Maybe your linker is not informed about where to look for the libs? Perhaps add a "-L 'local location'"?
Hope this helps ...
I created a new cocoa application in Xcode with 3 *.m files (main.m, AppDelegate.m, and projectnameTests.m).
In order to to use object-cpp, I renamed the 3 *.m files to *.mm files.
Then I get this following error from Xcode:
"Undefined symbols for architecture x86_64:
"_NSApplicationMain", referenced from:
_main in main.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)"
I have never dealt .o files, so am not sure what's wrong.
Please help.
P.S.: I use the latest Xcode, version(6.1.1).
Add AppKit.framework to the "Link Binary With Libraries" section under the Build Phases for your project target, and that should fix the problem.
P.S. Don't ask me why XCode automatically finds the necessary framework (i.e. AppKit.framework) for .m files but not for .mm files, but adding AppKit.framework fixes the issue because NSApplicationMain is defined in AppKit. Adding Cocoa.framework also fixes the issue, likely because it triggers XCode to automatically link with AppKit.framework.
I am trying to the use Boost Filesystem library in Xcode.
I installed Boost with brew install boost, and it was successful.
Turns out Boost wasn't linked so I ran brew link --overwrite Boost, which worked.
I am trying to #include <boost/filesystem.hpp> in my project, but have not been successful so far.
At first Xcode couldn't find <boost/filesystem.hpp>, so I added
/usr/local/lib
/usr/local/include
to my Header search paths for Target and Project.
That fixed the original problem, but then boost_system could not be found by Xcode.
Here is the transcript:
Undefined symbols for architecture x86_64:
"boost::system::system_category()", referenced from:
___cxx_global_var_init2 in main.o
"boost::system::generic_category()", referenced from:
___cxx_global_var_init in main.o
___cxx_global_var_init1 in main.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
I added the -lboost_system linker flag to my project, and now I am getting this error:
ld: library not found for -lboost_system
clang: error: linker command failed with exit code 1 (use -v to see invocation)
And it's definitely the correct linker flag, so perhaps Boost installed incorrectly after all.
I will update this question if I find a solution, but I would appreciate help in solving this problem.
You only need /usr/local/include in your header search path and you need /usr/local/lib in your library search path in order for the linker to find the libraries.
Had the same problem in xcode 6 . user header search path and library search was okay . still showed link error . I solved the problem by adding -lboost_system-mt in other linker flag in project target setting
I'm trying to learn FLTK for C++ and I'm working on a Macbook with the clang++ compiler. Whenever I try to link the library like this:
clang++ -L/usr/local/lib -lfltk
It gives me this error:
clang: warning: argument unused during compilation: '-X11'
Undefined symbols for architecture x86_64:
"_main", referenced from:
implicit entry/start for main executable
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
I've looked on a couple other forums to see how to fix this problem and haven't gotten any answers that worked. I also tried reinstalling Command Line Tools from Apple's Developer site.
You have to make sure you put the linker command (-L/usr/local/lib -lfltk) before doing filename.cpp -o Exectuable but still in the same line in the command line.