Trying to build our kext in Tiger, we ran into a snag with
undefined symbols for ___cxa_guard_acquire and ___cxa_guard_release
when we tried the kextload. Those symbols couldn't be found in any
source text for the build. Searching the assembly code, we found
the symbols as being near a line which had a statically included
class instantiation.
That is a construction such as:
void func(void)
{
...
static Class myClass;
...
}
Evidently the compiler generates these as a by-product of the class
instantiation.
By moving the class instantiation out of the function, into global
space, the symbols were not generated.
Also, the symbols weren't generated when we switched back to gcc
3.3 instead of the default 4.0.
Does this mean that we should be linking against something else, in
order to include static classes inside functions and gcc 4.0?
Does it mean that we shouldn't use static classes in that manner in
kext code?
Or does it mean that we should be using gcc 3.3 for our kexts?
Thanks,
Thane Heninger
Iomega
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