From 216ddfaf6bfc775b68c04d3666dd0b555296000b Mon Sep 17 00:00:00 2001 From: Andy Polyakov Date: Sun, 6 Feb 2005 13:10:23 +0000 Subject: [PATCH] Mention no-sse2 option in INSTALL note. --- INSTALL | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/INSTALL b/INSTALL index 1a1628f19b..91b639282f 100644 --- a/INSTALL +++ b/INSTALL @@ -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- Build without the specified cipher (bf, cast, des, dh, dsa, hmac, md2, md5, mdc2, rc2, rc4, rc5, rsa, sha). The crypto/ directory can be removed after running -- 2.25.1