hi, I have some code using __builtin_frame_address(0) to get the current stack pointer in a 'portable' way.
Unfortunately, this appears not to work if -fomit-frame-pointer is used on an x86. My system sets that automatically, since the x86 is a bit short on registers and this is reputed to help with optimisation. This leaves one having to do processor dependent register hackery to find the stack pointer. [I need a stack pointer approximation to find roots for a garbage collector] Is there another way? If not, I think to submit a bug report with 'feature request' status, to have a way to get the stack pointer that works even if -fomit-frame-pointer is specified. Any comments? Is it a reasonable request? BTW: what happens on ia64 which has two? stacks? -- John Skaller <skaller at users dot sf dot net> Felix, successor to C++: http://felix.sf.net
