based on asuswrt and some code come from https://github.com/RMerl/asuswrt-merlin.ng

The name of the overclocking firmware and uboot starts with P,such as P_BLUECAVE_R5.1.1-gc693e81.trx and P_BLUECAVE_uboot_B7.bin. You must ensure that the CPU does not overheat.

The GPL source is created for ASUS wireless router related products. Please visit the ASUS support site (http://support.asus.com) to get the latest GPL tarball.It has a lot in common with many wireless router open source projects, including Oleg/Tomato/DD-WRT/OpenWRT. Thanks the developers of those projects for making the source code available.

Set Up Environment(Tested in Fedora 8/9 and Ubuntu)

1. prepare environment

a. Ubuntu
    Install these packages (I used synaptic: "sudo synaptic")

    libncurses5
    libncurses5-dev
    m4
    bison
    gawk
    flex
    libstdc++6-4.4-dev
    g++-4.4
    g++
    gengetopt
    git (or git-core)
    gitk
    zlib1g-dev
    autoconf
    autopoint (or gettext)
    libtool
    shtool
    autogen
    mtd-utils
    intltool
    sharutils
    docbook-xsl-*
    libstdc++5
    texinfo
    dos2unix (or tofrodos)
    xsltproc
    uboot-mkimage
    device-tree-compiler
    python 2.7 or above.
    qemu
    gperf
    liblzo2-dev
    uuid-dev
    build-essential
    lzma-dev
    liblzma-dev
    lzma
    binutils-dev
    patch
    cmake
    intltool
    libglib2.0-dev
    gtk-doc-tools

    If you are using Ubuntu amd64, you may need to install 32-bit packages listed below.
        libc6-i386
        lib32stdc++6
        lib32z1
        libelf1:i386
        libncurses5:i386
        ia32-libs
        libc6-dev-i386

b. Fedora
    python 2.7 or above.
    sudo yum groupinstall "Development Tools"
    sudo yum install gettext-devel libxml2-devel mtd-utils-ubi ncurses-devel \
        zlib-devel intltool sharutils docbook-dtds docbook-style-xsl \
        uboot-tools dtc gengetopt qemu gperf cmake glib2-devel gtk-doc

    If you are using Fedora 19 or above, you need to install below packages.
    sudo yum groupinstall "C Development Tools and Libraries"

    If you are using Fedora x86_64, you may need to install 32-bit packages listed below.
        elfutils-libelf.i686
        glibc.i686
        libstdc++.i686
        zlib.i686

    If you are using Fedora 24+, you may need to install 32-bit packages listed below.
        ncurses-compat-libs.i686

prepare source to, ex, $HOME/asuswrt

cd $HOME tar xvfz [tar file]

setup development system

Lantiq/Intel SoC models

nothing to do

Broadcom SoC models

To install the tools:
    - copy the tools/brcm/ directory to /opt
    - add /opt/brcm/hndtools-mipsel-linux/bin to your path
    - add /opt/brcm/hndtools-mipsel-uclibc/bin to your path

Broadcom HND SoC models

Update your environment variables as following:
    - LD_LIBRARY_PATH=/opt/toolchains/crosstools-arm-gcc-5.3-linux-4.1-glibc-2.22-binutils-2.25/usr/lib
    - TOOLCHAIN_BASE=/opt/toolchains
    - PATH=/opt/toolchains/crosstools-arm-gcc-5.3-linux-4.1-glibc-2.22-binutils-2.25/usr/bin:/opt/toolchains/crosstools-aarch64-gcc-5.3-linux-4.1-glibc-2.22-binutils-2.25/usr/bin:/projects/hnd/tools/linux/hndtools-armeabi-2011.09/bin:$PATH

Mediatek/Ralink SoC models

To install the tools:
        - copy the tools/brcm/ directory to /opt
    - add /opt/brcm/hndtools-mipsel-linux/bin to your path
    - add /opt/brcm/hndtools-mipsel-uclibc/bin to your path
    If it is MT7621 or MT7628 chip:
        - extract tools/buildroot-gcc463_32bits.tar.bz2 to /opt
    - add /opt/buildroot-gcc463/bin to your path
    otherwise :
        - extract tools/buildroot-gcc342.tar.bz2 to /opt
    - add /opt/buildroot-gcc342/bin to your path

For MT7621 Uboot:
        - extract mips-2012.03.tar.bz2 directory to /opt
    - add /opt/mips-2012.03/bin to your uboot path

Qualcomm QCA9557/QCA953x/QCA956x MIPS SoC models

To install the tools:
    Mesh Router:
    - extract tools/openwrt-gcc463.mips.mesh.tar.bz2 directory to /opt
    - add /opt/openwrt-gcc463.mips.mesh/bin to your path
    - If you want to build small utilities out of asuswrt box,
      add STAGING_DIR environment variable as below:

      export STAGING_DIR=/opt/openwrt-gcc463.mips.mesh

    Others: (For example, RT-AC55U, 4G-AC55U.)
        - extract tools/openwrt-gcc463.mips.tar.bz2 directory to /opt
    - add /opt/openwrt-gcc463.mips/bin to your path
    - If you want to build small utilities out of asuswrt box,
      add STAGING_DIR environment variable as below:

      export STAGING_DIR=/opt/openwrt-gcc463.mips

Qualcomm IPQ806x/IPQ40xx ARM SoC models

For example, BRT-AC828.

To install the tools:
    - extract tools/openwrt-gcc463.arm.tar.bz2 directory to /opt
    - add /opt/openwrt-gcc463.arm/bin to your path
    - If you want to build small utilities out of asuswrt box,
      add STAGING_DIR environment variable as below:

      export STAGING_DIR=/opt/openwrt-gcc463.arm

Note: Broadcom/Ralink(except 4708 series) platform use the same toolchain for user space program, so please set PATH to the same directory as above

build firmware.

a. rt-n16 cd release/src-rt make rt-n16

b. rt-n56u cd release/src-ra make rt-n56u

c. rt-n65u cd release/src-ra-3.0 make rt-n65u

d. rt-n14u (/ rt-ac52u / rt-ac51u / rt-n11p / rt-n54u) cd release/src-ra-mt7620 make rt-n14u ( make rt-ac52u ) ( make rt-ac51u ) ( make rt-n11p ) ( make rt-n54u )

e. rt-ac56u (/ rt-ac68u / rt-n18uhp) cd release/src-rt-6.x.4708 make rt-ac56u ( make rt-ac68u ) ( make rt-n18uhp )

f. rt-ac55u (/ rt-ac55uhp ) cd release/src-qca make rt-ac55u ( make rt-ac55uhp )

g. brt-ac828 (/ rt-ac88q / rt-ad7200 ) cd release/src-qca-ipq8064 make brt-ac828 ( make rt-ad7200 )

h. rt-ac58u (/ rt-ac82u / map-ac1300 / map-ac2200 / vzw-ac1300 / rt-ac92u ) cd release/src-qca-dakota make rt-ac58u ( make rt-ac82u ) ( make map-ac1300 ) ( make map-ac2200 ) ( make vzw-ac1300 ) ( make rt-ac92u )

i. rt-ac85u (/ rt-ac85u / rt-ac65u / rp-ac87 ) cd release/src-ra-5010 make rt-ac85u ( make rt-ac65u ) ( make rp-ac87 )

j. rt-ac1200 (/ rt-n11p_b1 / rt-n10p_v3 / rt-ac1200gu / rt-ac51u+ / rt-ac53 ) cd release/src-ra-4300 make rt-ac1200 ( make rt-n11p_b1 ) ( make rt-n10p_v3 ) ( make rt-ac1200gu ) ( make rt-ac51u+ ) ( make rt-ac53 )

k. rp-ac68u (/ rp-ac53 / rp-ac55 ) cd release/src-rtk-819x make rp-ac68u ( make rp-ac53 ) ( make rp-ac55 )

l. bluecave cd release/src-lantiq make bluecave