I needed to update the tor revision that is available for an older installation of OpenWRT. The following are the procedures I used to build Tor for OpenWRT Backfire 10.03.1-rc4 r24045 using a OSX workstation.
The default FS configuration in OSX does not support case-sensitivity. Therefore we will download the SVN and all files onto a local sparse disk image we create with
hdiutil create -size 700m -type SPARSEBUNDLE -fs "Case-sensitive HFS+" -attach -nospotlight -volname openwrt_tor openwrt_tor
Get the sources for the specific tree, version and revision, from SVN:
cd /Volumes/openwrt_tor
svn checkout --revision=24045 svn://svn.openwrt.org/openwrt/tags/backfire_10.03.1
mv backfire_10.03.1/ backfire_10.03.1_r24045
cd backfire_10.03.1_r24045
Modify the package source configuration to grab for the same revision
cp feeds.conf.default feeds.conf
sed -i bk -e 's/openwrt\/packages/openwrt\/packages@24045/' feeds.conf
Update sources
./scripts/feeds update -a
./scripts/feeds install -a
Modify build configuration. I used make menuconfig and changed various options (use make menuconfig FORCE=1 if you want to force a build on HFS+ without case-sensitivity -- will probably break at some point in the build process though). Naimly changing the target for system type "Atheros AR9132 rev" and machine type "Buffalo WZR-HP-G300NH". The rest of the settings (kernel version, linux version) the menuconfig handled.
CONFIG_TARGET_ar71xx=y
CONFIG_TARGET_ar71xx_WZRHPG300NH=y
CONFIG_TARGET_BOARD="ar71xx"
CONFIG_TARGET_ARCH_PACKAGES="ar71xx"
CONFIG_DEFAULT_TARGET_OPTIMIZATION="-Os -pipe -mips32r2 -mtune=mips32r2 -funit-at-a-time"
CONFIG_LINUX_2_6_32=y
I also added the tor package it already had just to see what happens. Might be helpful to see the build flags and configuration already setup for this package.
make