I am trying to use the hdf5-format to store data. Problem is, that I fail to link against the library. I have the following code
#include <H5Cpp.h>
int main(void){
H5::H5File file("test_MatrixRoundTrip_Double.h5", H5F_ACC_TRUNC);
}
and compile it using
gcc -std=c++11 -o main main.cpp -I /usr/local/include/ -L /usr/local/lib/ -lhdf5 -lhdf5_hl
This always returns the error
Undefined symbols for architecture x86_64:
"H5::FileAccPropList::DEFAULT", referenced from:
_main in main-c207d1.o
"H5::FileCreatPropList::DEFAULT", referenced from:
_main in main-c207d1.o
"H5::H5File::H5File(char const*, unsigned int, H5::FileCreatPropList const&, H5::FileAccPropList const&)", referenced from:
_main in main-c207d1.o
"H5::H5File::~H5File()", referenced from:
_main in main-c207d1.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 installed the hdf5 library on OSX using
brew install homebrew/science/hdf5
What am I doing wrong here?
You are including the HDF5 C++ header file, but only linking the HDF5 C library. Add the line: -lhdf5_cpp to link the C++ shared object and use locate libhdf5_cpp to find it's libpath.
Related
I am trying to test Jansson on Xcode 7.3.1. I installed according to the instructions, then used cMake when that didn't work, which also didn't work. I think Xcode is having trouble finding the Jansson library. I have modified the project header and library paths in many different ways, after extensive suggestions from searching out this problem. Xcode is able to find the header. Note also that I am able to install Jansson and run it in Eclipse. Any insight would be appreciated.
Here is the error log from Xcode:
Ld /Users/corrychapman/Library/Developer/Xcode/DerivedData/JanssonDev-dispcmnteuwiedaiazlbkwtztfcu/Build/Products/Debug/JanssonDev normal x86_64
cd /Users/corrychapman/Desktop/jansson-2.11/JanssonDev
export MACOSX_DEPLOYMENT_TARGET=10.11
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -arch x86_64 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.11.sdk -L/Users/corrychapman/Library/Developer/Xcode/DerivedData/JanssonDev-dispcmnteuwiedaiazlbkwtztfcu/Build/Products/Debug -L/usr/local/lib -L/Users/corrychapman/Desktop/jansson-2.11/JanssonDev -F/Users/corrychapman/Library/Developer/Xcode/DerivedData/JanssonDev-dispcmnteuwiedaiazlbkwtztfcu/Build/Products/Debug -filelist /Users/corrychapman/Library/Developer/Xcode/DerivedData/JanssonDev-dispcmnteuwiedaiazlbkwtztfcu/Build/Intermediates/JanssonDev.build/Debug/JanssonDev.build/Objects-normal/x86_64/JanssonDev.LinkFileList -mmacosx-version-min=10.11 -Xlinker -no_deduplicate -Xlinker -dependency_info -Xlinker /Users/corrychapman/Library/Developer/Xcode/DerivedData/JanssonDev-dispcmnteuwiedaiazlbkwtztfcu/Build/Intermediates/JanssonDev.build/Debug/JanssonDev.build/Objects-normal/x86_64/JanssonDev_dependency_info.dat -o /Users/corrychapman/Library/Developer/Xcode/DerivedData/JanssonDev-dispcmnteuwiedaiazlbkwtztfcu/Build/Products/Debug/JanssonDev
Undefined symbols for architecture x86_64:
"_json_array_get", referenced from:
_main in main.o
"_json_array_size", referenced from:
_main in main.o
"_json_delete", referenced from:
_json_decref in main.o
"_json_loads", referenced from:
_main in main.o
"_json_object_get", referenced from:
_main in main.o
"_json_string_value", 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)
Found it. Build Settings -> Linking -> Other Linker Flags: -ljansson
I am trying to build a C source file based on Linphone in Mac OS X Sierra but getting the following error.
This is the link for the C source file.
http://www.linphone.org/docs/liblinphone/group__basic__call__tutorials.html
Edited:
I am trying to compile the source code with this command
clang -o tt tt.c -I/Users/softdev/Downloads/linphone-sdk-3.11.1-mac/include/
Error:
Undefined symbols for architecture x86_64
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 tried to change the target cpu but didn't work.
My system has XCode 8. Any help regarding this will be appreciated.
Edited: Complete Output
Undefined symbols for architecture x86_64:
"_linphone_call_get_state", referenced from:
_main in tt-ca2045.o
"_linphone_call_ref", referenced from:
_main in tt-ca2045.o
"_linphone_call_unref", referenced from:
_main in tt-ca2045.o
"_linphone_core_destroy", referenced from:
_main in tt-ca2045.o
"_linphone_core_invite", referenced from:
_main in tt-ca2045.o
"_linphone_core_iterate", referenced from:
_main in tt-ca2045.o
"_linphone_core_new", referenced from:
_main in tt-ca2045.o
"_linphone_core_terminate_call", referenced from:
_main in tt-ca2045.o
"_ms_usleep", referenced from:
_main in tt-ca2045.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 got the sample code to compile using this:
clang -o hello hello.c -Ilinphone-sdk-3/include -Llinphone-sdk-3/lib -llinphone -lmediastreamer_base
Clang's -I parameter points to the where the header (.h) files live
And as for my additions, -L specifies the path for clang to get to where the lib files live. In your case, it might live in -L/Users/softdev/Downloads/linphone-sdk-3.11.1-mac/lib
then -l specifies which dylibs you want to include (strip off the lib prefix and the dylib suffix).
Lastly, you need to add a missing line to the sample code you pointed to. Add:
#include <unistd.h>
after signal.h
I am trying to use the code Nauty and Traces http://pallini.di.uniroma1.it/. But when I complied an example, say nautyex8.c (provided by the package), the following error showed up:
Undefined symbols for architecture x86_64:
"_alloc_error", referenced from:
_main in nautyex8-54d9da.o
"_densenauty", referenced from:
_main in nautyex8-54d9da.o
"_dispatch_graph", referenced from:
_main.options in nautyex8-54d9da.o
"_nauty_check", referenced from:
_main in nautyex8-54d9da.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 am using Mac OS X Yosemite (10.10.5) and Xcode (version 7.1). I believe that there is no error in the codes because they are widely used so I guess the problem comes from my system settings.
Thank you so much!
I've just opened a pull request to make brew install nauty work on OS X: https://github.com/Homebrew/homebrew-core/pull/48701
Until then, here's how you would build nautyex8.c on OS X, as of Nauty/Traces 2.6r12.
Step 1 is to download the code and build the library:
wget http://pallini.di.uniroma1.it/nauty26r12.tar.gz
tar zxvf nauty26r12.tar.gz
cd nauty26r12
./configure
make
ls -l nauty.a
Step 2 is to compile nautyex8.c and link it against the library you just built:
gcc -O3 nautyex8.c nauty.a
./a.out
You probably forgot to put that "nauty.a" at the end of your compiler command line. If I do that too, I get:
gcc -O3 nautyex8.c
Undefined symbols for architecture x86_64:
"_alloc_error", referenced from:
_main in nautyex8-05f086.o
"_densenauty", referenced from:
_main in nautyex8-05f086.o
"_dispatch_graph", referenced from:
_main.options in nautyex8-05f086.o
"_nauty_check", referenced from:
_main in nautyex8-05f086.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
which exactly matches the symptom you described.
Ld /Users/ashutoshagarwal/Library/Developer/Xcode/DerivedData/c-cnyfflmvjyaashaoduqduqqsfegd/Build/Products/Debug/c normal x86_64
cd /Users/ashutoshagarwal/Desktop/c
setenv MACOSX_DEPLOYMENT_TARGET 10.9
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -arch x86_64 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk -L/Users/ashutoshagarwal/Library/Developer/Xcode/DerivedData/c-cnyfflmvjyaashaoduqduqqsfegd/Build/Products/Debug -F/Users/ashutoshagarwal/Library/Developer/Xcode/DerivedData/c-cnyfflmvjyaashaoduqduqqsfegd/Build/Products/Debug -filelist /Users/ashutoshagarwal/Library/Developer/Xcode/DerivedData/c-cnyfflmvjyaashaoduqduqqsfegd/Build/Intermediates/c.build/Debug/c.build/Objects-normal/x86_64/c.LinkFileList -mmacosx-version-min=10.9 -framework Foundation -Xlinker -dependency_info -Xlinker /Users/ashutoshagarwal/Library/Developer/Xcode/DerivedData/c-cnyfflmvjyaashaoduqduqqsfegd/Build/Intermediates/c.build/Debug/c.build/Objects-normal/x86_64/c_dependency_info.dat -o /Users/ashutoshagarwal/Library/Developer/Xcode/DerivedData/c-cnyfflmvjyaashaoduqduqqsfegd/Build/Products/Debug/c
Undefined symbols for architecture x86_64:
"_add_history", referenced from:
_main in main.o
"_readline", referenced from:
_main in main.o
_source 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 am getting Apple-Mach-O Linker (Id) Error, have sent hours trying to fix this one, Dunno what to do.
It looks like you are using the GNU readline and GNU history libraries, which are available, by default, on the mac in libedit.dylib:
$ nm /usr/lib/libedit.dylib | fgrep readline
0000000000009899 T _readline
000000000001f444 D _readline_echoing_p
000000000001f400 D _rl_readline_name
000000000001f3f8 D _rl_readline_version
$ nm /usr/lib/libedit.dylib | fgrep add_history
000000000000acbc T _add_history
(the T indicates that the symbol is in the library's text section).
Therefore you need to add -ledit to your linker command line. If you are using Xcode then you can add libedit.dylib to the list of libraries to link against or if you are using make then you probably have to edit the LIBS variable in your Makefile.
The error message:
Undefined symbols for architecture x86_64: "_add_history", referenced from: _main in main.o
"_readline", referenced from: _main in main.o _source 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)'
Tells you that the linker cannot find the symbols readline and add_history. Without seeing your source code, and the precise linker and compiler command-lines, it's hard to speculate the exact cause. A likely cause is that you failed to link with external libraries, or other modules of your program.
Yet another symbol(s) not found issue with Mac OS X. I wrote a C program that uses the libev event loop library that when compiled produces this output:
$ make
clang midnight.c midnight_logging.c -o midnight
Undefined symbols for architecture x86_64:
"_ev_default_loop", referenced from:
_main in midnight-Wlcawk.o
"_ev_io_start", referenced from:
_main in midnight-Wlcawk.o
"_ev_run", referenced from:
_main in midnight-Wlcawk.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make: *** [midnight] Error 1
I used homebrew to install libev. The shared library is in /usr/local/lib per normal and I've used every combination of compiler arguments including "-I /usr/local/lib", "-l libev" and "-L /usr/local/lib".
Assistance appreciated, I'd rather not have to statically compile.
But you do not link against libev! The compiler isn't a clairvoyant (nor is the linker), you have to tell it what to search for those symbols...
clang midnight.c midnight_logging.c -o midnight -lev