X-Git-Url: https://git.openssl.org/?p=openssl.git;a=blobdiff_plain;f=FAQ;h=86b6617f4479456b6bc9f6938a9079f0b538a8f2;hp=30913a11b3039fb3b8a6dbfa861e2c1a95364e09;hb=8d3509b93728a16f5ba830b04a8fe9e879bdd8df;hpb=788e67e227106454a2fb708b94b030883a8a10c2

diff --git a/FAQ b/FAQ
index 30913a11b3..86b6617f44 100644
--- a/FAQ
+++ b/FAQ
@@ -46,6 +46,8 @@ OpenSSL  -  Frequently Asked Questions
 * Why does the OpenSSL test suite fail on MacOS X?
 * Why does the OpenSSL test suite fail in BN_sqr test [on a 64-bit platform]?
 * Why does OpenBSD-i386 build fail on des-586.s with "Unimplemented segment type"?
+* Why does the OpenSSL test suite fail in sha512t on x86 CPU?
+* Why does compiler fail to compile sha512.c?
 
 [PROG] Questions about programming with OpenSSL
 
@@ -141,8 +143,8 @@ less Unix-centric, it might have been used much earlier.
 
 With version 0.9.6 OpenSSL was extended to interface to external crypto
 hardware. This was realized in a special release '0.9.6-engine'. With
-version 0.9.7 (not yet released) the changes were merged into the main
-development line, so that the special release is no longer necessary.
+version 0.9.7 the changes were merged into the main development line,
+so that the special release is no longer necessary.
 
 * How do I check the authenticity of the OpenSSL distribution?
 
@@ -598,6 +600,23 @@ Reportedly elder *BSD a.out platforms also suffer from this problem and
 remedy should be same. Provided binary is statically linked and should be
 working across wider range of *BSD branches, not just OpenBSD.
 
+* Why does the OpenSSL test suite fail in sha512t on x86 CPU?
+
+If the test program in question fails withs SIGILL, Illegal Instruction
+exception, then you more than likely to run SSE2-capable CPU, such as
+Intel P4, under control of kernel which does not support SSE2
+instruction extentions. See accompanying INSTALL file and
+OPENSSL_ia32cap(3) documentation page for further information.
+
+* Why does compiler fail to compile sha512.c?
+
+OpenSSL SHA-512 implementation depends on compiler support for 64-bit
+integer type. Few elder compilers [ULTRIX cc, SCO compiler to mention a
+couple] lack support for this and therefore are incapable of compiling
+the module in question. The recommendation is to disable SHA-512 by
+adding no-sha512 to ./config [or ./Configure] command line. Another
+possible alternative might be to switch to GCC.
+
 [PROG] ========================================================================
 
 * Is OpenSSL thread-safe?