Undefined symbols for arm64

[vcasado]

Hello,

I am trying to implement the Tiny AES library for a proyect (Mobile Android and iOS) and when I try to compile, I get this errors:

Undefined symbols for architecture arm64:
  "AES_ECB_encrypt(unsigned char*, unsigned char const*, unsigned char*, unsigned int)", referenced from:
      BLEInterface::onCharacteristicChanged(QLowEnergyCharacteristic const&, QByteArray const&) in bleinterface.o
  "AES_init(unsigned char)", referenced from:
      BLEInterface::onCharacteristicChanged(QLowEnergyCharacteristic const&, QByteArray const&) in bleinterface.o
ld: symbol(s) not found for architecture arm64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

The app has been working fine, this errors have appeared from the Tiny AES Lib import.
I have searched that it could be a wrong CMake config, but I have the -DCMAKE_OSX_ARCHITECTURES:STRING=arm64

Thank you

[jsulm]

@vcasado Do you use an arm64 build of that library?

[JoeCFD]

@vcasado

add this in your cmakefile
set(CMAKE_VERBOSE_MAKEFILE ON)
to check if the lib of Tiny AES library is added to your build.

[vcasado]

@jsulm The library is provided as source https://github.com/kokke/tiny-AES-c
And I am not using its CMakeLists.txt, I have imported in my src/ and inc/ folders the .h .hpp and .c files and added to my CMakeLists.txt as other sources.

[SGaist]

@vcasado hi,

Then please show your CMakeLists.txt content.

[vcasado]

@SGaist Hi,

This is my CMakeLists.txt

cmake_minimum_required(VERSION 3.16)

project(BLETester VERSION 1.1 LANGUAGES CXX)

set(CMAKE_CXX_STANDARD_REQUIRED ON)
set(CMAKE_VERBOSE_MAKEFILE ON)

find_package(Qt6 6.4 REQUIRED COMPONENTS Quick Bluetooth Positioning Location Widgets)

qt_standard_project_setup()

qt_add_executable(BLETester
    main.cpp
    mainwindow.cpp
    bleinterface.cpp
    mainwindow.h
    bleinterface.h
    characteristicinfo.cpp characteristicinfo.h
    aes.c aes.h aes.hpp
)

set_target_properties(BLETester PROPERTIES
    MACOSX_BUNDLE_GUI_IDENTIFIER my.example.com
    MACOSX_BUNDLE_BUNDLE_VERSION ${PROJECT_VERSION}
    MACOSX_BUNDLE_SHORT_VERSION_STRING ${PROJECT_VERSION_MAJOR}.${PROJECT_VERSION_MINOR}
    MACOSX_BUNDLE TRUE
    WIN32_EXECUTABLE TRUE
)

if (APPLE)
    if (IOS)
        set_target_properties(BLETester PROPERTIES MACOSX_BUNDLE_INFO_PLIST "${CMAKE_CURRENT_SOURCE_DIR}/Info.plist")
    endif()
endif()

target_link_libraries(BLETester
    PRIVATE
        Qt::Bluetooth
        Qt::Core
        Qt::Gui
        Qt::Qml
        Qt::Quick
        Qt::Positioning
        Qt::Location
        Qt::Widgets
)

install(TARGETS BLETester
    BUNDLE DESTINATION .
    LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
    RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
)

And included in bleinterface.h:

#include "aes.hpp"

And used in bleinterface.cpp:

AES_init(0);
AES_ECB_encrypt(in_Buffer, key, output_Buffer, value[2]);

Thank you.

[JoeCFD]

@vcasado said in Undefined symbols for arm64:

aes.h aes.hpp

are aes.h and aes.hpp same? It is rare to define two files like that.

[vcasado]

@JoeCFD No, the .hpp is like a wrapper that contains:

#ifndef _AES_HPP_
#define _AES_HPP_

#ifndef __cplusplus
#error Do not include the hpp header in a c project!
#endif //__cplusplus

extern "C" {
#include "aes.h"
}

#endif //_AES_HPP_

But in the CMakeLists.txt, the .h is included so it does not report that file not found when compiling

[JonB]

@vcasado
I know nothing about this, but are you sure the 2 undefined references with those parameters are really supposed to be in Tiny AES's library aes.h? When I look at e.g. https://morioh.com/p/67a35723557d or https://github.com/kokke/tiny-AES-c/blob/master/aes.h I do not see either of them?

[vcasado]

@JonB You are right, now the usage in bleinterface.cpp is:

    struct AES_ctx ctx;
    AES_init_ctx(&ctx, key);

    for (int i = 0; i < 4; ++i)
    {
        AES_ECB_encrypt(&ctx, in_Buffer + (i * 16));
    }

And the error is:

Undefined symbols for architecture arm64:
  "_AES_ECB_encrypt", referenced from:
      BLEInterface::onCharacteristicChanged(QLowEnergyCharacteristic const&, QByteArray const&) in bleinterface.o
  "_AES_init_ctx", referenced from:
      BLEInterface::onCharacteristicChanged(QLowEnergyCharacteristic const&, QByteArray const&) in bleinterface.o
ld: symbol(s) not found for architecture arm64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

[JonB]

@vcasado
I also know nothing about cmake :) Can you at least show the full linker command line it uses, let's see whether libaes.a is even there? Assuming it comes with a library not just source code you compile into yours. I also know nothing about Android/iOS building!

[vcasado]

@JonB There is no compiled library, that is why I am compiling it as it would be more sources of my project

[SGaist]

You have locked your project to C++ only. Remove that and rebuild.

[vcasado]

@SGaist How?

[JonB]

@vcasado said in Undefined symbols for arm64:

project(BLETester VERSION 1.1 LANGUAGES CXX)

I'm purely guessing, but chage this? E.g. ... LANGUAGES CXX C?

[vcasado]

@JonB said in Undefined symbols for arm64:

@vcasado said in Undefined symbols for arm64:

project(BLETester VERSION 1.1 LANGUAGES CXX)

I'm purely guessing, but chage this? E.g. ... LANGUAGES CXX C?

Fixed with this! Thank you!