X-Git-Url: http://git.chise.org/gitweb/?a=blobdiff_plain;f=PROBLEMS;h=db106aedeb924c0d600170c1b2fd9b1ed3a23d66;hb=fbbe177ecff068d6e0a058cca4c1dd4da21546bf;hp=42225f4d807cf225812e2a757387303818b93d40;hpb=ea1ea793fe6e244ef5555ed983423a204101af13;p=chise%2Fxemacs-chise.git.1

diff --git a/PROBLEMS b/PROBLEMS
index 42225f4..db106ae 100644
--- a/PROBLEMS
+++ b/PROBLEMS
@@ -41,8 +41,8 @@ crashes in the function skip-syntax-backward.
 There have been reports of egcs-1.1 not compiling XEmacs correctly on
 Alpha Linux.  There have also been reports that egcs-1.0.3a is O.K.
 
-*** Don't use -O2 with gcc 2.7.2 under Intel/XXX without also using
-`-fno-strength-reduce'.
+*** Don't use -O2 or -O3 with Cygwin 1.0, CodeFusion-99070 or gcc 2.7.2 on x86
+without also using `-fno-strength-reduce'.
 
 gcc will generate incorrect code otherwise.  This bug is present in at
 least 2.6.x and 2.7.[0-2].  This bug has been fixed in GCC 2.7.2.1 and
@@ -50,6 +50,25 @@ later.  This bug is O/S independent, but is limited to x86 architectures.
 
 This problem is known to be fixed in egcs (or pgcc) 1.0 or later.
 
+Unfortunately, later releases of Cygnus-released compilers (not the
+Net-released ones) have a bug with the same `problem signature'.
+
+If you're lucky, you'll get an error while compiling that looks like:
+
+event-stream.c:3189: internal error--unrecognizable insn:
+(insn 256 14 15 (set (reg/v:SI 24)
+        (minus:SI (reg/v:SI 25)
+            (const_int 2))) -1 (insn_list 11 (nil))
+    (nil))
+    0       0 [main]
+
+If you're unlucky, your code will simply execute incorrectly.
+
+*** Don't use gcc-2.95.2 with -mcpu=ultrasparc on Solaris 2.6.
+
+gcc will assume a 64-bit operating system, even though you've
+merely told it to assume a 64-bit instruction set.
+
 *** Don't use -O2 with gcc 2.7.2 under Intel architectures without also
 using `-fno-caller-saves'.