Cross compile the Qt5 Core library for OpenWRT MIPS platform.

• If you are running OpenWRT 14.07, please use the master branch.
• If you are running OpenWRT 19.07, please use the 19.07 branch.

You can see all the modules available by browsering the folders of Qt5 source code.
For example, qtchart is a module under qt-everywhere-src-5.11.3. You can modify the Makefile to disable/enable this module.

You can see all the features available by following command.

./configure --list-features

You can modify the Makefile to disable/enable this feature.

For more information, please refer to https://doc.qt.io/qt-5/configure-options.html.

• If the target device has not enough space to install the library, you could choose to install the library to /tmp/. However, /tmp/ resides in ram and will be lost after reboot.
• If the target device has enough space to install the library, you need to modify the Makefile.

OpenWRT compiler is required.

1. Download SDK, for example https://archive.openwrt.org/barrier_breaker/14.07/ramips/mt7620n/OpenWrt-SDK-ramips-for-linux-x86_64-gcc-4.8-linaro_uClibc-0.9.33.2.tar.bz2

2. Extract the SDK

3. Clone this repo

4. Put this repo into SDK/package

5. Install dependencies by

   sudo apt install libncurses-dev zlib1g-dev gawk subversion python build-essential ccache

6. Compile by

   make package/qt5-openwrt-package/compile V=s

7. It will take a long time to build

8. You can find compiled ipk files in SDK/bin/

1. Copy compiled ipk files to the target device by scp

2. Install ipk files by

   opkg install qt5-core_5.11-3_ramips_24kec.ipk
   opkg install qt5-network_5.11-3_ramips_24kec.ipk

1. At the root of SDK, execute following command

   make -C scripts/config/ clean  
   make

2. then, go to the qt source code and make install by

   cd  build_dir/target-mipsel_24kec+dsp_uClibc-0.9.33.2/qt-everywhere-src-5.11.3  
   make install

3. On your Ubuntu, please install qtcreator and other tools by

   sudo apt install qtcreator qt5-default build-essential  

4. Add a new QT Device: QT Creator --> Tools --> Options --> Devices --> Add --> Generic Linux Device

   • Name: OpenWrt Device
   • Authentcation Type: Password
   • Host address: Your device ip address
   • SSH port: 22
   • Username: your device username
   • Password: your device password

5. Set a new compiler: QT Creator --> Tools --> Options --> Build & Run --> Compilers --> Add --> GCC --> for both C/C++

   • Name: OpenWrt GCC and OpenWrt G++
   • ABI: mips-linux-generic-elf-32bit
   • Compiler path (GCC): staging_dir/toolchain-mipsel_24kec+dsp_gcc-4.8-linaro_uClibc-0.9.33.2/bin/mipsel-openwrt-linux-uclibc-gcc
   • Compiler path (G++): staging_dir/toolchain-mipsel_24kec+dsp_gcc-4.8-linaro_uClibc-0.9.33.2/bin/mipsel-openwrt-linux-uclibc-g++

6. Set a new debugger: QT Creator --> Tools --> Options --> Build & Run --> Debuggers --> Add

   • Name: OpenWrt Debugger
   • Path: staging_dir/toolchain-mipsel_24kec+dsp_gcc-4.8-linaro_uClibc-0.9.33.2/bin/mipsel-openwrt-linux-uclibc-gdb

7. Set a Qt5 version: QT Creator --> Tools --> Options --> Build & Run --> Qt Versions --> Add

   • qmake location: staging_dir/toolchain-mipsel_24kec+dsp_gcc-4.8-linaro_uClibc-0.9.33.2/bin/qmake

8. Add a new Kit: QT Creator --> Tools --> Options --> Build & Run --> Kits --> Add

   • Name: OpenWrt Kit
   • Device Type: Generic Linux Device
   • Device: OpenWrt Device (default for Generic Linux)
   • Compiler: C, OpenWrt GCC; C++, OpenWrt G++
   • Debugger: OpenWrt Debugger
   • Qt version: Qt 5.11.3

9. Create a New Project --> Qt Console Application --> Choose... --> Name: helloWorld --> qmake --> OpenWrt Kit --> Finsh

   #include <QTextStream>
   int main()
   {
       QTextStream(stdout) << "Hello World!" << endl;
       return 0;
   }

10. Build. Transfer to your target device and run.

• OpenWRT 14.07 based industrial 4G router

• Forked from https://github.com/pawelkn/qt5-openwrt-package
• Updated by https://github.com/vonger
• Inspired by http://vonger.cn/?p=14588