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Mention no-sse2 option in INSTALL note.

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Andy Polyakov 2005-02-06 13:10:23 +00:00
parent 8aa36bcac9
commit 216ddfaf6b
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14
INSTALL
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@ -77,6 +77,20 @@
386 Use the 80386 instruction set only (the default x86 code is
more efficient, but requires at least a 486).
no-sse2 Exclude SSE2 code pathes. Normally SSE2 extention is
detected at run-time, but the decision whether or not the
machine code will be executed is taken solely on CPU
capability vector. This means that if you happen to run OS
kernel which does not support SSE2 extension on Intel P4
processor, then your application might be exposed to
"illegal instruction" exception. There might be a way
to enable support in kernel, e.g. FreeBSD kernel can be
compiled with CPU_ENABLE_SSE, and there is a way to
disengage SSE2 code pathes upon application start-up,
but if you aim for wider "audience" running such kernel,
consider no-sse2. Both 386 and no-asm options above imply
no-sse2.
no-<cipher> Build without the specified cipher (bf, cast, des, dh, dsa,
hmac, md2, md5, mdc2, rc2, rc4, rc5, rsa, sha).
The crypto/<cipher> directory can be removed after running