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Wed May 12 17:14:25 CEST 2010 · https://mail.python.org/pipermail/python-dev/2010-May/100050.html

> Short history: new GCC 4.5.0 (released a month ago), when compiling with
> -O3, is adding MMX/SSE instructions that requires stack aligned to 16
> byte. This is wrong, since x86 ABI only requires stack aligned to 4 bytes.

I think this is debatable. It depends on the operating system also;
ultimately, it is the OS vendor who specifies the C ABI for their
systems. On Linux, in absence of a vendor, the ABI is what the kernel
and gcc define it to be.

Regards,
Martin

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Showing content from https://mail.python.org/pipermail/python-dev/2010-May/100050.html below:

[Python-Dev] HEADS UP: Compilation risk with new GCC 4.5.0