Compile openwrt in Centos7

Compile openwrt in Centos7
1. download the latest openwrt source code

git clone https://github.com/openwrt/openwrt.git

2. Download feeds

Run $./scripts/feeds update-a $./scripts/feeds install-.

3. Configure the environment

Make defconfig check required dependencies $ sudo yum-y install gcc binutils patch bzip2 flex bison make autoconf gettext texinfo unzip sharutils libncurses5-dev ncurses-term zlib1g-dev wget perl-Thread-Queue openssl-devel zlib- static ncurses-devel gcc-c ++ $ make prereq $ make menuconfig

You can configure options in the text dialog box. The most important configuration items are:

Target system (Target system type)

Package selection)

Build system settings (compile system settings)

Kernel modules (Kernel module)

[*] Indicates that the package is selected for compilation and installed in firmware;

[M] indicates that the software package is selected for compilation but not installed in firmware.

When you exit Menuconfig, the system prompts whether to save the configuration.

4. Compile

• Generally, use a simple command:

  $ make

• To speed up a multi-core processor system (for example, a 3-core processor ):

  $ make –j 3

• Compile in the background and use idle I/O resources and CPU performance (for example, using a dual-core processor)

  $ onice -c 3 nice -n 20 make -j 2

• Compile a separate software package (for example, in the cups Software Package ):

  $ make package/cups/compile V=99

• If you need to analyze the compilation error information for special reasons:

  $ make V=99 2>&1 |tee build.log |grep -i error

  Note: Save all compiled output information in build. log and print the error information on the screen.

• An Application of Complex commands

  $ ionice -c 3 nice -n 20 make -j 2 V=99 CONFIG_DEBUG_SECTION_MISMATCH=y 2>&1 |tee build.log |egrep -i '(warn|error)'

  Note: Save all compiled output information in build. log, and print the error and warning information on the screen. The compilation process uses a dual-core CPU, occupying background resources.

5. Image Generation location

The newly generated image is stored in the new bin directory by default.

$ ls bin/*

6. Cleanup

$ make clean 

In addition to clearing the generated directory, you also want to clear the cross-compilation tool (and tool chain directory)

$ make dirclean

Clear all related items, including downloaded software packages, configuration files, and feed content:

$ make distclean

7. Install openwrt