8000 app problem · Issue #38 · Tencent/ncnn · GitHub
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eeric opened this issue Jul 26, 2017 · 13 comments
Closed

app problem #38

eeric opened this issue Jul 26, 2017 · 13 comments

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@eeric
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eeric commented Jul 26, 2017

error as following:
undefined reference to 'ncnn:Net::load_param(unsigned char const*)'
undefined reference to 'ncnn:Net::load_model(unsigned char const*)'
undefined reference to 'ncnn:Net::from_pixels(unsigned char const*,int,int,int)'
........
undefined reference to 'ncnn:Net::Net()'
undefined reference to 'ncnn:Net::~Net()'
error:linker command failed with exit code 1 (use -v to see invocation)
@noiplcx
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noiplcx commented Jul 26, 2017

刚刚我也遇到这个错误了

$ export ANDROID_NDK=/absolute/path/to/the/android-ndk

$ mkdir build && cd build

$ cmake -DCMAKE_TOOLCHAIN_FILE=path/to/the/android.toolchain.cmake ..

$ make -j8

$ make install

亲测可用

@eeric
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eeric commented Jul 26, 2017

@noiplcx，你是在linux下生成libncnn.a，又在linux下编译jni的吗？

@eeric
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eeric commented Jul 27, 2017

@noiplcx，试过了，会提示2个错误，后来按官网cmake打包android-sdk配置环境，成功生成libsqueezencnn.so，地址：https://github.com/Tencent/ncnn/wiki/cmake-打包-android-sdk，
之后也能运行app，但要注意assets文件夹在android studio工程中的位置。

@eeric eeric mentioned this issue Jul 28, 2017
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@devil2028
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@eeric 能分享个 .so文件用吗？

@dangbo
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dangbo commented Jul 29, 2017

https://github.com/dangbo/ncnn-mobile use ncnn in Android and iOS

@ghost
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ghost commented Aug 1, 2017

@eeric 我按照cmake打包android-sdk的说明，最后结果如下，并没有生成.so 文件，请教下是什么问题
➜ build-android git:(master) ✗ make install
[100%] Built target ncnn
Install the project...
-- Install configuration: "release"
-- Installing: /Users/yangguangdejianjian/code/ncnn/build-android/install/lib/libncnn.a
-- Installing: /Users/yangguangdejianjian/code/ncnn/build-android/install/include/blob.h
-- Installing: /Users/yangguangdejianjian/code/ncnn/build-android/install/include/cpu.h
-- Installing: /Users/yangguangdejianjian/code/ncnn/build-android/install/include/layer.h
-- Installing: /Users/yangguangdejianjian/code/ncnn/build-android/install/include/mat.h
-- Installing: /Users/yangguangdejianjian/code/ncnn/build-android/install/include/net.h
-- Installing: /Users/yangguangdejianjian/code/ncnn/build-android/install/include/opencv.h
-- Installing: /Users/yangguangdejianjian/code/ncnn/build-android/install/include/platform.h
➜ build-android git:(master) ✗ make package
make: *** No rule to make target `package'. Stop.
➜ build-android git:(master) ✗

@eeric
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eeric commented Aug 1, 2017

@jj8401
按照https://github.com/Tencent/ncnn/wiki/cmake-打包-android-sdk，把这句-DANDROID_NATIVE_API_LEVEL=android-8，改成高版本的，比如android-18等，
另外，这句make package不需要，在obj文件夹或者lib文件夹内应该有的

@ghost
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ghost commented Aug 1, 2017

@eeric 我已经改过了 生成的.so文件有1.5m大小，相比官方参考的那个app里的.so文件270kb，想问下您生成的士多大，有没有影响

@eeric
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eeric commented Aug 2, 2017

@jj8401，我的1.23M，这个大小与你的编译工具有关吧

@ghost
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ghost commented Aug 2, 2017

@eeric 非常感谢

@nihui nihui closed this as completed Sep 30, 2017
@enduringstack
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@eeric 你的NDK版本和CMAKE版本能说下吗

@eeric
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eeric commented Oct 11, 2017

@enduringstack
android-ndk-r13b以上版本就可以了
cmake 3.22

@ronyuzhang ronyuzhang mentioned this issue Oct 16, 2018
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@zym1119
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zym1119 commented Oct 28, 2018

@jj8401
按照https://github.com/Tencent/ncnn/wiki/cmake-打包-android-sdk，把这句-DANDROID_NATIVE_API_LEVEL=android-8，改成高版本的，比如android-18等，
另外，这句make package不需要，在obj文件夹或者lib文件夹内应该有的

请问您的.so文件是在make install以后就有的么？还是在jni文件夹内ndk_build后才生成的？
而且我在make install后build-android文件夹内也没有obj或者lib文件夹啊？
我在ndk_build的时候报错unresolved reference to ncnn::Net::load_param()等，请问您知道是怎么回事么

@jiefly jiefly mentioned this issue May 13, 2020
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@liuguicen liuguicen mentioned this issue Oct 29, 2021
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@zhu-zhaofei zhu-zhaofei mentioned this issue Dec 19, 2021
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@gmagic10 gmagic10 mentioned this issue May 12, 2022
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@nihui @eeric @dangbo @devil2028 @noiplcx @enduringstack @zym1119
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