$ arm_now start armv5-eabi
# opkg list | grep debugger
debugfs - 1.43.7-1 - Ext2 Filesystem debugger
gdb - 8.0.1-1 - GDB, the GNU Project debugger, allows you to see what is going on `inside' another program while it executes -- or what another program was doing at the moment it crashed.
# opkg install gdb # already installed
# opkg install gdb_legacy # for mips32el
# opkg install python
# opkg install strace # already installed
# opkg install binutils
# opkg install gcc # might need more disk space, check the arm_now resize command