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Posted: **2024-03-08 14:55**

//opt/RKNN/rknpu2/runtime/RV1106/Linux/librknn_api/lib/librknnmrt.so: undefined reference to `__ctype_tolower'
//opt/RKNN/rknpu2/runtime/RV1106/Linux/librknn_api/lib/librknnmrt.so: undefined reference to `__ctype_b'

在给 luckfoxpico pro交叉编译mmdeploy在link demo的时候提示undefined reference to `__ctype_b'
I got this when cross-compile mmdeploy on ubuntu18.04 for luckfoxpico pro: undefined reference to `__ctype_b'

请问有没有什么解决额办法？
Do anyone know what should I do to pass this?

Posted: **2024-03-09 9:29**

Hello,

__ctype_tolower and __ctype_b are c library functions, which may be related to your compilation environment.

Check whether this error will occur when compiling rknpu2 directly. If an error is reported, please check your compilation environment:

1. Install rknpu2

Code: Select all

git clone https://github.com/rockchip-linux/rknpu2.git

2. Set environment variables

Code: Select all

export RK_RV1106_TOOLCHAIN=<SDK directory>/tools/linux/toolchain/arm-rockchip830-linux-uclibcgnueabihf/bin/arm-rockchip830-linux-uclibcgnueabihf

3. Cross compilation

Code: Select all

chmod +x build-linux_RV1106.sh
./build-linux_RV1106.sh

Note: rknpu2 has stopped maintenance, and the secondary development is still based on the routines in rknn_model_zoo

Posted: **2024-03-09 11:59**

Eng38 wrote: ↑2024-03-09 9:29 Hello,

__ctype_tolower and __ctype_b are c library functions, which may be related to your compilation environment.

Check whether this error will occur when compiling rknpu2 directly. If an error is reported, please check your compilation environment:

1. Install rknpu2
Code: Select all
git clone https://github.com/rockchip-linux/rknpu2.git
2. Set environment variables
Code: Select all
export RK_RV1106_TOOLCHAIN=<SDK directory>/tools/linux/toolchain/arm-rockchip830-linux-uclibcgnueabihf/bin/arm-rockchip830-linux-uclibcgnueabihf
3. Cross compilation
Code: Select all
chmod +x build-linux_RV1106.sh
./build-linux_RV1106.sh
Note: rknpu2 has stopped maintenance, and the secondary development is still based on the routines in rknn_model_zoo

Appreciate for your reply. I figure out what is wrong with my project. I failed to set the RKNN tool chain so that the cmake used the system's gcc-linux-armhf compiler. This also may raise exception even if compiling is complete,. For instance, the execute file can not run on target board, because system's compiler uses GlibC , whereas rv1106 uses ulibc tool chain.

I fix this problem now. However, the compiling process still break down when linking with rknn. There is the :
Error:

Code: Select all

/opt/RKNN/arm-rockchip830-linux-uclibcgnueabihf/bin/../lib/gcc/arm-rockchip830-linux-uclibcgnueabihf/8.3.0/../../../../arm-rockchip830-linux-uclibcgnueabihf/bin/ld.bfd: ../../lib/libmmdeploy.so.1.3.1: undefined reference to `rknn_run'
/opt/RKNN/arm-rockchip830-linux-uclibcgnueabihf/bin/../lib/gcc/arm-rockchip830-linux-uclibcgnueabihf/8.3.0/../../../../arm-rockchip830-linux-uclibcgnueabihf/bin/ld.bfd: ../../lib/libmmdeploy.so.1.3.1: undefined reference to `rknn_query'
/opt/RKNN/arm-rockchip830-linux-uclibcgnueabihf/bin/../lib/gcc/arm-rockchip830-linux-uclibcgnueabihf/8.3.0/../../../../arm-rockchip830-linux-uclibcgnueabihf/bin/ld.bfd: ../../lib/libmmdeploy.so.1.3.1: undefined reference to `rknn_outputs_get'

I try to fix this error by modifying part of cmake file:

Code: Select all

    link_directories("/opt/RKNN/rknpu2/runtime/RV1106/Linux/librknn_api/armhf/librknn_api.so")
    link_directories("/opt/RKNN/rknpu2/runtime/RV1106/Linux/librknn_api/armhf/librknnmrt.so")

I also ensured that the rknn_api.h is included in the project.

Code: Select all

// Copyright (c) OpenMMLab. All rights reserved.
#include "rknn_net.h"
#include <stdio.h>

#include <fstream>

#include "mmdeploy/core/logger.h"
#include "mmdeploy/core/model.h"
#include "mmdeploy/core/utils/filesystem.h"
#include "mmdeploy/core/utils/formatter.h"

namespace mmdeploy::framework {

static inline const char* const rknn_type(rknn_tensor_type type) {
  switch (type) {
    case RKNN_TENSOR_FLOAT32:
      return "FP32";

But they don't work. I wonder if there are any solutions for this? Thanks.

Posted: **2024-03-12 10:30**

Kyle wrote: ↑2024-03-09 11:59 I try to fix this error by modifying part of cmake file:
Code: Select all
    link_directories("/opt/RKNN/rknpu2/runtime/RV1106/Linux/librknn_api/armhf/librknn_api.so")
    link_directories("/opt/RKNN/rknpu2/runtime/RV1106/Linux/librknn_api/armhf/librknnmrt.so")

link_directories is mainly used to specify the directories where the linker searches for library files, rather than directly specifying the library name. In CMake, you can use target_link_libraries to explicitly specify the linked library names. For example:

Code: Select all

target_link_libraries(rknn_yolov5_demo "/opt/RKNN/rknpu2/runtime/RV1106/Linux/librknn_api/armhf/librknnmrt.so")

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