出现错误:未定义对功能Android NDK的引用 [英] Getting error: undefined reference to function Android NDK

问题描述

我已经尝试解决此问题超过两天了，但还是没有运气.

I have been trying to solve this issue for more than two days, but still no luck.

我不知道出什么问题了，我只需要建立一个简单的NDK项目，但是这已经花费了很多时间.

I have no idea what is wrong, I need just to set up a simple NDK project, but it has already taken a tremendous amount of time.

问题是我正在

error: undefined reference to 'firpm(unsigned int, std::vector<double, std::allocator<double> > const&, std::vector<double, std::allocator<double> > const&, std::vector<double, std::allocator<double> > const&, double, int)'

这是我的根CMakeLists

Here is my root CMakeLists

# Cmake Minimum Version
cmake_minimum_required(VERSION 3.4.1)
project(EcgProcessing)
# Add nested cmake files
include(libs/CMakeLists.txt)

include_directories(${CMAKE_CURRENT_SOURCE_DIR})

# ECG Audio Processor library
add_library(ecg-signal-processor-demodulator SHARED
            demodulator.cpp)
add_library(ecg-signal-processor-qrsdetection SHARED
            qrsdetection.cpp)
# Link

target_link_libraries(
            firpm_d
            log
            android
            ecg-signal-processor-demodulator
            ecg-signal-processor-qrsdetection)

在libs目录中

# Cmake Minimum Version
cmake_minimum_required(VERSION 3.4.1)
set(LIBS_DIRECTORY ${CMAKE_CURRENT_LIST_DIR})
#include_directories(${CMAKE_CURRENT_SOURCE_DIR}/Eigen/)
MACRO(ADD_SUBLIB libname source_ext)
  #Compute required sources
  set(sublib_path "${LIBS_DIRECTORY}/${libname}")
  file(GLOB_RECURSE sublib_sources "${sublib_path}/src/*.${source_ext}")
  #Create library
  IF( sublib_sources )
    ADD_LIBRARY(${libname} SHARED ${sublib_sources})
  ENDIF()
  #add this library's header folder to the global include set
  INCLUDE_DIRECTORIES("${sublib_path}/include")
  INCLUDE_DIRECTORIES("${sublib_path}/")
  link_directories(${sublib_path})
ENDMACRO(ADD_SUBLIB)

ADD_SUBLIB(firpm_d "cpp")
ADD_SUBLIB(eigen "cpp")

它开始编译项目，但是最终出现错误.

It starts to compile the project, however ends up with the error.

什么会导致此错误，我不知道该怎么做.

What can cause this error, I have no idea what to try else.

这是源代码，因此您可以看到它们的全部结构. https://github.com/DurianOdour/EcgProcessor

Here is source code, so you can see it all structured. https://github.com/DurianOdour/EcgProcessor

感谢您的帮助

推荐答案

我已经找到解决方案.这是

I Have found the solution. Here it is

Android ndk(cmake):在第二个jni库中使用log api时未定义对__android_log_write的引用

问题在于链接库的顺序不正确.

The problem was in the incorrect order of linking libraries.

这段代码很好用

# Link
target_link_libraries(
            ecg-signal-processor
            log
            android
            firpm_d)

第一个参数应该是需要依赖项的库.

The first arguments should be a library that requires dependencies.

target_link_libraries(<target> [item1 [item2 [...]]]
                      [[debug|optimized|general] <item>] ...)

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