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cpython/Modules/_hacl/Hacl_Hash_Blake2s_Simd128_universal2.c
Russell Keith-Magee ef530ce7c6
gh-123748: Add conditional compilation rules for HACL SIMD256 and SIMD128 on macOS (#123989)
Add conditional compilation rules to allow HACL SIMD256 and SIMD128 to be ignored on the ARM64 pass of universal2 macOS builds.
2024-09-16 12:23:05 +08:00

15 lines
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C

// This file isn't part of a standard HACL source tree.
//
// It is required for compatibility with universal2 macOS builds. The code in
// Hacl_Hash_Blake2s_Simd128.c will compile on macOS ARM64, but performance
// isn't great, so it's disabled. However, because universal2 builds are
// compiled in a single pass, autoconf detects that the required compiler
// features *are* available, and tries to include this file.
//
// To compensate for this, autoconf will include *this* file instead of
// Hacl_Hash_Blake2s_Simd128.c when compiling for universal. This allows the
// underlying source code of HACL to remain unmodified.
#if !(defined(__APPLE__) && defined(__arm64__))
#include "Hacl_Hash_Blake2s_Simd128.c"
#endif