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updated Building.md

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Logan oos Even 3 years ago
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@ -141,7 +141,6 @@ So far, the following portions of n2n's code benefit from hardware features:
AES: AES-NI AES: AES-NI
ChaCha20: SSE2, SSSE3 ChaCha20: SSE2, SSSE3
SPECK: SSE2, SSSE3, AVX2, AVX512, (NEON) SPECK: SSE2, SSSE3, AVX2, AVX512, (NEON)
Pearson Hashing: AES-NI
Random Numbers: RDSEED, RDRND (not faster but more random seed) Random Numbers: RDSEED, RDRND (not faster but more random seed)
``` ```
@ -149,6 +148,8 @@ The compilations flags could easily be combined:
`./configure CFLAGS="-O3 -march=native"`. `./configure CFLAGS="-O3 -march=native"`.
There are reports of compile errors showing `n2n_seed': random_numbers.c:(.text+0x214): undefined reference to _rdseed64_step'` even though the CPU should support it, see #696. In this case, best solution found so far is to disable `RDSEED` support by adding `-U__RDSEED__` to the `CFLAGS`.
## OpenSSL Support ## OpenSSL Support
Some ciphers' speed can take advantage of OpenSSL support which is disabled by default as the built-in ciphers already prove reasonably fast in most cases. OpenSSL support can be configured using Some ciphers' speed can take advantage of OpenSSL support which is disabled by default as the built-in ciphers already prove reasonably fast in most cases. OpenSSL support can be configured using

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