[_cbsz]

The flags for disabling executable stack are: "-Wl,-z execstack" "-Wa,--execstack"

I also added -U_FORTIFY_SOURCE in the Makefile for the exploit project that the security course I'm TAing is currently working on. Not sure if that was entirely necessary.

[jergal]

Look at the output of `objdump -d prog | grep call | grep _chk | wc -l', if the value returned is zero/0/0x0 you haven't got FORTIFY_SOURCE enabled, and would be unnecessary to add -U_FORTIFY_SOURCE.

However this is dependant upon implementation set restrictions and defaults.