The thing I did for OpenBSD 3.7 is patch the gcc-3.3.x we use:

     -   On OpenBSD, by default, trampoline code generation is disabled in gcc
         3.3.5.  Code requiring trampolines will not compile without
         -ftrampolines.  The warning flag -Wtrampolines can be used to locate
         trampoline instances if trampoline generation is re-enabled.


that way, you still have trampolines available in C if you need them, but you
don't risk compiling dangerous code that disables executable stack protection
by mistake.

It's probably quite trivial to write a similar patch for gcc-current,
assuming you guys think it's the right design decision.

After enabling that patch, we recompiled the whole system, all of X, and the
3000 packages of third party sources.  

-ftrampolines was needed exactly 0 times.

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