===================================================================
RCS file: /home/cvs/OpenXM/doc/OpenXM-web/news-o.html,v
retrieving revision 1.19
retrieving revision 1.20
diff -u -p -r1.19 -r1.20
--- OpenXM/doc/OpenXM-web/news-o.html	2021/07/27 03:51:25	1.19
+++ OpenXM/doc/OpenXM-web/news-o.html	2021/12/27 23:40:42	1.20
@@ -26,6 +26,23 @@ ftp://ftp.math.kobe-u.ac.jp/pub/XXX no longer works. U
 <h2> News </h2>
 
 <ul>
+<li id="xcodeBug1">
+Risa/Asir generated by 
+<pre>
+clang --version
+Apple clang version 13.0.0 (clang-1300.0.29.30)
+</pre>
+based on llvm 12 on M1 Mac
+causes a segmentation fault when dp_ptod is called under some data.
+The reason for it is that the optimizer generates a code which leads to
+make the Boehm GC to collect a non-garbage memory chunk
+(a local-variable - 8 is stored only in a register. The local-variable
+is not stored in the stack.).
+A workaround for it commited to
+<a href="http://c1.math.kobe-u.ac.jp/cgi-bin/cvsweb.cgi/OpenXM_contrib2/asir2018/engine/dist.c.diff?r1=1.25&r2=1.26&f=h"> this change </a>.
+However, it is highly recommended to compile Risa/Asir by
+the clang provided by homebrew <a href="https://formulae.brew.sh/formula/llvm">llvm@13</a>.
+(December 28, 2021)
 <li> cvsweb at c1 is temporaly down. Please use this
 <a href="http://fe.math.kobe-u.ac.jp/cgi-bin/cvsweb.cgi/">cvsweb</a>,
 <li> Debian package openxm-1.3.3-5 (network installer, 64bit) can be installed
@@ -195,7 +212,7 @@ nk_mora (tangent cone algorithm for D, local b-functio
 </ul>
 
 <pre>
-$OpenXM: OpenXM/doc/OpenXM-web/news-o.html,v 1.18 2021/03/29 08:03:43 takayama Exp $
+$OpenXM: OpenXM/doc/OpenXM-web/news-o.html,v 1.19 2021/07/27 03:51:25 takayama Exp $
 </pre>
 
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