From 03b272d2c2b68e169d821ad73e9f23ff7925c576 Mon Sep 17 00:00:00 2001
From: Janis Johnson
Date: Fri, 19 Oct 2001 16:52:31 +0000
Subject: [PATCH] * doc/install.texi (Specific, sparc-sun-solaris2*) Copy
documentation about 64-bit support from the 3.0_branch version.
From-SVN: r46350
---
gcc/doc/install.texi | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/gcc/doc/install.texi b/gcc/doc/install.texi
index 98404edf36d..ea43627d91d 100644
--- a/gcc/doc/install.texi
+++ b/gcc/doc/install.texi
@@ -3251,6 +3251,18 @@ This is Sun bug 4237974. This is fixed with patch 108908-02 for Solaris
2.6 and has been fixed in later (5.x) versions of the assembler,
starting with Solaris 7.
+Starting with Solaris 7, the operating system is capable of executing
+64-bit SPARC V9 binaries. GCC 3.0 doesn't properly support this yet.
+Although some patches or recipes to enable this support have been posted
+to various newsgroups and mailing lists, we recommend against using
+them, since the compiler may either crash or, worse, silently generate
+bad code. If you really need this capability now, you might try a CVS
+version of GCC 3.1, which will fully support this. If all you want is
+code tuned for the UltraSPARC CPU, you should try the
+@option{-mtune=ultrasparc} option instead, which should be safe from
+those bugs and produce code that, unlike full 64-bit code, can still run
+on non-UltraSPARC machines.
+
@html