Prerequisites:

● A 64 bit linux machine (I have used FC-13).

● This should be compiled as root user.

● The dd-wrt source code for WNDR4500 (can be downloaded from this link).

● Toolchain to compile dd-wrt (may be downloaded from this link).

STEP:1

Execute the following commands ,

# tar -zxvf DDWRT_WNDR4500_Release_06-06-2012.tgz

# cd DDWRT_WNDR4500_Release_06-06-2012

# tar -zxvf dd-wrt.tgz

STEP 2:

Copy Toolchain.tgz.zip in /opt directory and execute following commands ,

# cd /opt

# unzip Toolchain.tgz.zip

# tar -zxvf Toolchain.tgz

STEP 3:

Open “dd-wrt/src/linux/brcm/linux-2.6.23/Makefile” and perform the following modification.

 Code (Original) :

 ARCH = $(SUBARCH)

 CROSS_COMPILE = /xfs/toolchains/toolchain-mipsel_gcc4.1.2/bin/mipsel-linux-uclibc-

 #CROSS_COMPILE = mipsel-linux-uclibc-

 # Architecture as present in compile.h

 UTS_MACHINE := $(ARCH)

 Code (After Modification) :

 ARCH = $(SUBARCH)

 #CROSS_COMPILE = /xfs/toolchains/toolchain-mipsel_gcc4.1.2/bin/mipsel-linux-uclibc-

 CROSS_COMPILE = /opt/Toolchain/Kernel/toolchain-mipsel_gcc4.1.2/bin/mipsel-linux-uclibc-

#CROSS_COMPILE = mipsel-linux-uclibc-

 # Architecture as present in compile.h

 UTS_MACHINE := $(ARCH)

STEP 4:

Export toolchain path using the following command:

# export PATH=/opt/Toolchain/Userspace/toolchain-mipsel_gcc-linaro_uClibc-0.9.32/bin/:$PATH

STEP 5:

Next to compile the code for WNDR4500 execute following commands,

# cd dd-wrt/src/linux/brcm/linux-2.6.23/

# cp .config_WNDR4500 .config

#cd -

# cd dd-wrt/src/router

# cp .config_mega_WNDR4500 .config

# make -f Makefile.brcm26 configure clean all install

STEP 6:
If everything goes fine, the target firmware will be placed in “dd-wrt/src/router/mipsel-uclibc/” with name “dd-wrt.v24-K26_WNDR4500.chk”.