OpenWRT: Build Firmware
WARNING: ini akan membutuhkan banyak akses ke Internet untuk download, termasuk waktu proses make. Termasuk download kernel linux, waktu compile toolchain :( ... Tampaknya tidak bisa OFFLINE :(
Sumber:
- https://forum.openwrt.org/viewtopic.php?id=15201
- http://wiki.openwrt.org/doc/howto/build
- http://downloads.openwrt.org/docs/buildroot-documentation.html
Prosedur
- Lakukan sebagai non-root user
- Lakukan semua perintah di <buildroot dir> misalnya ~/openwrt/trunk/
- Update OpenWrt source
- Update & install package feeds.
- Configure build.
- Start build. Ini akan secara automatis compile Ttoolchain, cross-compile sources, package packages, dan generate image siap untuk di flashed.
- Proceed to Installing OpenWrt
Persiapan
Lakukan
sudo su apt-get update apt-get install subversion gawk flex sharutils bison libz-dev patch fakeroot lzma
Menggunakan SVN
Sebagai user biasa lakukan
svn co svn://svn.openwrt.org/openwrt/branches/backfire ~/openwrt/trunk/ cd ~/openwrt/trunk/ ./scripts/feeds update ./scripts/feeds install <pkg_name_1> <pkg_name_2> ... <pkg_name_N> make defconfig make menuconfig make world
Update SVN
cd ~/openwrt/trunk/ svn update ./scripts/feeds update
Menggunakan GIT
git clone git://nbd.name/openwrt.git ~/openwrt/trunk/ cd ~/openwrt/trunk/ ./scripts/feeds update # You have to change feeds.conf to use the git packages repo. See the patch below. ./scripts/feeds install <pkg_name_1> <pkg_name_2> ... <pkg_name_N> # After installing the package (creates the symlink for you, you can select it in menuconfig) make menuconfig # Choose your Target System/Subtarget/Target Profile and select packages/features make world
Update GIT
cd ~/openwrt/trunk/ git pull ./scripts/feeds update
Tips
Kita dapat menentukan / menset chipset mana yang akan kita gunakan. Di target/linux/chipname/, ada makefile yang mengatakan kernel mana yang akan dibuat, contoh di Kamikaze tepatnya kamikaze/target/linux/atheros/Makefile.
LINUX_VERSION:=2.6.23.17
Ubah ini sesuai dengan subversion yang anda inginkan.
Build di multi-core CPU
Proses build dapat di percepat dengan menjalankan beberapa concurrent job process mengunakan option -j seperti
make -j 3
Gunakan standard formula <jumlah CPU + 1>. Jika cara ini menyebabkan error saat build, coba compile tanpa option -j.
Build di background
Jika anda ingin menggunakan sistem / mesin anda waktu anda build, kita dapat membuat proses build hanya menggunakan I/O dan kapasitas CPU yang ide, contoh untuk CPU dualcore:
ionice -c 3 nice -n 20 make -j 2
Build single Packages
Saat kita melakukan developing atau packaging software untuk OpenWrt, akan lebih memudahkan jika kita dapat membuat untuk package yang kita inginkan saja (misalnya untuk package cups):
make package/cups/compile V=99
Untuk package mc (midnight commander), yang kebetulan berada feed packages perintahnya akan seperti
make package/feeds/packages/mc/compile v=99
Melihat build errors
If for some reason the build fails, the easiest way to spot the error is to do:
make V=99 2>&1 | tee build.log | grep -i error
The above saves a full verbose copy of the build output (with stdout piped to stderr) in /openwrt/trunk/build.log and only shows errors on the screen.
Another example:
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)'
The above saves a full verbose copy of the build output (with stdout piped to stderr) in build.log and outputs only warnings and errors while building using only background resources on a dual core CPU. Getting beep notification
Depending on your CPU, the process will take a while, or while longer. If you want an acoustic notification, you could use echo -e '\a':
make V=99 ; echo -e '\a'
Locating Images
Jika berhasil image yang kita buat akan berada di bawah directory
<buildroot dir>/bin
Jika kita buat firmware untuk ar71xx maka ada di bawah
<buildroot dir>/bin/ar71xx directory.
Jika <buildroot dir> adalah /openwrt/trunk, maka binary ada di
/openwrt/trunk/bin/ar71xx.
Cleaning Up
You might need to clean your build environment every now and then. The following make-targets are useful for that job:
Clean
make clean
deletes contents of bin and build_dir directories.
Dirclean
make dirclean
deletes contents of /bin and /build_dir directories and additionally /staging_dir and /toolchain (=the cross-compile tools). 'Dirclean' is your basic "Full clean" operation.
Distclean
make distclean
nukes everything you have compiled or configured and also deletes all downloaded feeds contents and package sources.
CAUTION: In addition to all else, this will erase your build configuration (.config), your toolchain and all other sources. Use with care!
There are numerous other functionalities in the OpenWrt build system, but the above should have covered some of the fundamentals.
Referensi
- https://forum.openwrt.org/viewtopic.php?id=15201
- http://wiki.openwrt.org/doc/howto/build
- http://downloads.openwrt.org/docs/buildroot-documentation.html