blob: 4408227b326c495cfd876908e18ebff48abef32d (
plain)
1
2
3
4
5
6
7
8
|
Add ``-fmax-type-align=8`` to CFLAGS when clang compiler is detected. The
pymalloc memory allocator aligns memory on 8 bytes. On x86-64, clang expects
alignment on 16 bytes by default and so uses MOVAPS instruction which can
lead to segmentation fault. Instruct clang that Python is limited to
alignemnt on 8 bytes to use MOVUPS instruction instead: slower but don't
trigger a SIGSEGV if the memory is not aligned on 16 bytes. Sadly, the flag
must be added to ``CFLAGS`` and not just ``CFLAGS_NODIST``, since third party C
extensions can have the same issue.
|
