I'm using cocos2d-iphone (develop-v2) and xcode 5 and have this error when trying to archive my app: (and not when I compile it)
libs/kazmath/src/neon_matrix_impl.c:64:15:
error: unknown register name 'q0' in asm
: "memory", "q0", "q1", "q2", "q3", "q8", "q9", "q10", "q11", "q12", "q13", "q14", "q15" //clobber
^
libs/kazmath/src/neon_matrix_impl.c:93:15: error: unknown register name 'q0' in asm
: "memory", "q0", "q1", "q8", "q9", "q10", "q11" //clobber
^
2 errors generated.
How to fix that?
I had to replace:
#if defined(__ARM_NEON__)
by:
#if defined(_ARM_ARCH_7)
in the file neon_matrix_impl.c.
This is the error in kazmath if you just change in neon_matrix_impl.c only
Undefined symbols for architecture arm64:
"_NEON_Matrix4Mul", referenced from:
_kmMat4Multiply in libcocos2d-library.a(mat4.o)
ld: symbol(s) not found for architecture arm64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
You have to change ARM_NEON to ARMARCH_7 in two files:
neon_matrix_impl.c
mat4.c
In both files search for the #if and replace it.
#if defined(__ARM_NEON__)
With
#if defined(_ARM_ARCH_7)
64-bit should work fine after that.
#if defined(_ARM_ARCH_7) compiles with cocos2D v2.1, but does link errors (on iPad Air).
I've upgraded my karmath library with cocos2D v3 kazmath lib (https://github.com/cocos2d/cocos2d-iphone/tree/develop-v3/external/kazmath).
It works for me.
Related
I am trying to build Shared Object (.so) files for the ImageMagick library however stuck due to following error while creating .so file
[arm64-v8a] Executable : magick
ld: error: undefined symbol: aligned_alloc
>>> referenced by memory.c:262 (././ImageMagick-7.0.9-17/MagickCore\memory.c:262)
>>> memory.o:(AcquireAlignedMemory) in archive ./obj/local/arm64-v8a/libmagickcore-7.a
>>> referenced by memory.c:262 (././ImageMagick-7.0.9-17/MagickCore\memory.c:262)
>>> memory.o:(AcquireVirtualMemory) in archive ./obj/local/arm64-v8a/libmagickcore-7.a
>>> referenced by memory.c:262 (././ImageMagick-7.0.9-17/MagickCore\memory.c:262)
>>> memory.o:(AcquireVirtualMemory) in archive ./obj/local/arm64-v8a/libmagickcore-7.a
clang++: error: linker command failed with exit code 1 (use -v to see invocation)
make: *** [C:/hostedtoolcache/windows/ndk/r22b/x64/build//../build/core/build-binary.mk:741: obj/local/arm64-v8a/magick] Error 1
Error: Process completed with exit code 1.
I have very basic knowledge on c++, any suggestions are welcome if I am missing something.
Here's GitHub Actions link where I am generating .so file and facing error for ease of reproducing the issue.
https://github.com/malaythecool/Android-ImageMagick7/runs/2316777388?check_suite_focus=true
From the CI logs, it shows up
././ImageMagick-7.0.9-17/MagickCore/memory.c:262:10: warning: implicit declaration of function 'aligned_alloc' is invalid in C99 [-Wimplicit-function-declaration]
which finally ends up in the linker complaining for the missing symbol
ld: error: undefined symbol: aligned_alloc
Try adding the flag -std=c++1z to your build configuration since aligned_alloc() was introduced in C++17.
EDIT:
It seems the Application.mk already sets the -std=c++17 here. Could you try adding the following flag too:
APP_CONLYFLAGS += -std=c11
to ensure that the C standard is updated to C11 wherein alloc_aligned() was introduced?
I'm trying to use the fmt (https://github.com/fmtlib/fmt) formatting header library in my c++ project.
I've added the path to the core header file at the top of my main file like so:
#include "../third_party/fmt/core.h"
but when I try to call any function like:
string message = fmt::format("The answer is {}", 42);
I get the following error:
Undefined symbols for architecture x86_64:
"std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > fmt::v5::internal::vformat<char>(fmt::v5::basic_string_view<char>, fmt::v5::basic_format_args<fmt::v5::buffer_context<char>::type>)", referenced from:
std::__1::basic_string<std::__1::enable_if<internal::is_string<char [17]>::value, fmt::v5::internal::char_t<char [17]>::type>::type, std::__1::char_traits<std::__1::enable_if<internal::is_string<char [17]>::value, fmt::v5::internal::char_t<char [17]>::type>::type>, std::__1::allocator<std::__1::enable_if<internal::is_string<char [17]>::value, fmt::v5::internal::char_t<char [17]>::type>::type> > fmt::v5::format<char [17], int>(char const (&) [17], int const&) in main.cpp.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[2]: *** [main] Error 1
make[1]: *** [CMakeFiles/main.dir/all] Error 2
make: *** [all] Error 2
I'm not sure how to use this as this is how I have used other header libraries in the past such as cxxopts. Any help would be appreciated!
You should link with the fmt library or use the optional header-only mode.
For example, if you have the file test.cc:
#include <fmt/core.h>
int main() {
fmt::print("The answer is {}.", 42);
}
You can compile and link it with gcc:
g++ -std=c++11 test.cc -lfmt
From a comment in #vitaut's answer, if you change your #include line from this:
#include "../third_party/fmt/core.h"
to this:
#include "../third_party/fmt/format.h"
it will cause the code to be compiled in "header-only mode", and you won't need to change your build process to compile and link in the {fmt} library.
I'm working on Mac, and I did not realize that you can install the library using brew. It appears at the end of the page. I have been dealing with symbol errors all evening, and I'm not sure that all my problems were related to the build process. The compiling process was also not working properly.
The paths where the library is installed are: /usr/local/include and /usr/local/lib.
I'm using g++-11 to build my project and this instruction works for me:
g++-11 -std=c++20 -I/usr/local/include -L/usr/local/lib -lfmt main.cpp -o main
The only problem is that it works partially. It works fine with print:
fmt::print("Don't {}!\n", "panic");
But it breaks using format:
fmt::format("Don't {}!\n", "panic");
I'm missing something, but I'm not sure what.
By the way, if you are using VSCode, you can create a c_cpp_properties.json into your .vscode folder and add the include path for the headers.
{
"includePath": [
[...],
"/usr/local/include/"
],
}
Not sure if this is related to your case, but I hope it helps.
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
Heres the code, extremely basic Cpp
#include <iostream>
using namespace std;
int main(){
cout << "C++ is FUN!\n";
return 0;
}
The symbols that can not be found are "std" trying to use the name space, and "cout".
the full error message is.
make: *** [FirstProject] Error 1 FirstProject C/C++ Problem
Symbol 'cout' could not be resolved FirstProgram.cpp /FirstProject line 5 Semantic Error
Symbol 'std' could not be resolved FirstProgram.cpp /FirstProject line 2 Semantic Error
symbol(s) not found for architecture x86_64 FirstProject C/C++ Problem
EDIT:
here is the whole linker line:
make all
Building target: FirstProject
Invoking: Cross G++ Linker
g++ -o "FirstProject" ./FirstProgram.o
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)
make: *** [FirstProject] Error 1
Does anyone know what could potentially be the problem?
You are not compiling using a C++ compiler.
If you are using the GNU toolchain then use g++ and not gcc.
You need to compile then link:
g++ -c -o FirstProgram.o FirstProgram.c
g++ -o FirstProject FirstProgram.o
Or you can combine into one statement:
g++ -o FirstProject FirstProgram.c
I am doing some testing today and was searching for a command line program that would allow me to extract files out of tcp traffic, I seem to have found one called tcpxtract, however when I try to compile it, I get the following error on make
Undefined symbols for architecture i386:
"_yywrap", referenced from:
_yylex in confl.o
_input in confl.o
ld: symbol(s) not found for architecture i386
collect2: ld returned 1 exit status
make: *** [tcpxtract] Error 1
What can I do to get it to compile?
I'm on a Macbook Pro Retina Early 2013 running 0SX 10.8.4
You need to link with -lfl (the flex library). Make sure it's after your object files.
Edit your Makefile after running configure. Go down to the line that says
LIBS = -lpcap
(circa line 130)
and change it to:
LIBS = -lpcap -ll
It should then build.