Boost.Build 1.73.0 Error

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Installed boost and then tried example...
/usr/include/boost_1_73_0/build-develop/example/hello

Looking for input on...
How to solve this error after installing latest version boost (1.73.0)?


*ERROR: rule "[[bbv2.builtin.features.warnings]]`warnings`::" unknown in
module "warnings-feature".*

If I remove the block comments in warnings-feature.jam the error simply
propogates to next jam file with block comment.

Only thing I can find online is suggestion that may not be using latest
version of boost.build as error suggestive that b2 does not understand
block comments.

Here is link https://lists.boost.org/Archives/boost/2020/03/248336.php

Below is boost version and boost.build version after install...

$ cat /usr/include/boost_1_73_0/boost/version.hpp | grep "BOOST_LIB_VERSION"
//  BOOST_LIB_VERSION must be defined to be the same as BOOST_VERSION
#define BOOST_LIB_VERSION "1_73"

$ b2 -v
Boost.Jam  Version 2015.07. OS=LINUX.
   Copyright 1993-2002 Christopher Seiwald and Perforce Software, Inc.
   Copyright 2001 David Turner.
   Copyright 2001-2004 David Abrahams.
   Copyright 2002-2015 Rene Rivera.
   Copyright 2003-2015 Vladimir Prus.

Thanks in advance

Dennis

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<div dir=3D"ltr"><div style=3D"font-family:Calibri,Arial,Helvetica,sans-ser=
if;font-size:12pt;color:rgb(0,0,0)"><div style=3D"margin:0px;font-size:12pt=
">Installed boost and then tried example...</div><div style=3D"margin:0px;f=
ont-size:12pt"><div style=3D"margin:0px;font-size:12pt">/usr/include/boost_=
1_73_0/build-develop/example/hello<br></div><div style=3D"margin:0px;font-s=
ize:12pt"><br></div><div style=3D"margin:0px;font-size:12pt">Looking for in=
put on...</div></div><div style=3D"margin:0px;font-size:12pt">How to solve =
this error after installing latest version boost (1.73.0)?</div><div style=
=3D"margin:0px;font-size:12pt"><br></div><div style=3D"margin:0px;font-size=
:12pt"><b>ERROR: rule &quot;[[bbv2.builtin.features.warnings]]`warnings`::&=
quot; unknown in module &quot;warnings-feature&quot;.<br></b></div><div sty=
le=3D"margin:0px;font-size:12pt"><br></div><div style=3D"margin:0px;font-si=
ze:12pt"><div style=3D"margin:0px;font-size:12pt">If I remove the block com=
ments in warnings-feature.jam the error simply propogates to next jam file =
with block comment.</div></div><div style=3D"margin:0px;font-size:12pt"><br=
></div><div style=3D"margin:0px;font-size:12pt">Only thing I can find onlin=
e is suggestion that may not be using latest version of boost.build as erro=
r suggestive that b2 does not understand block comments.</div><div style=3D=
"margin:0px;font-size:12pt"><br></div><div style=3D"margin:0px;font-size:12=
pt">Here is link=C2=A0<a href=3D"https://lists.boost.org/Archives/boost/202=
0/03/248336.php" id=3D"gmail-m_-5652548607565506557LPlnk945760" target=3D"_=
blank">https://lists.boost.org/Archives/boost/2020/03/248336.php</a></div><=
div style=3D"margin:0px"><div style=3D"margin:0px;font-size:12pt"><br></div=
><div style=3D"margin:0px;font-size:12pt">Below is boost version and boost.=
build version after install...</div><div style=3D"margin:0px;font-size:12pt=
"><br></div></div></div><div style=3D"font-family:Calibri,Arial,Helvetica,s=
ans-serif;font-size:12pt;color:rgb(0,0,0)">$ cat /usr/include/boost_1_73_0/=
boost/version.hpp | grep &quot;BOOST_LIB_VERSION&quot;<br><div>// =C2=A0BOO=
ST_LIB_VERSION must be defined to be the same as BOOST_VERSION<br></div><di=
v>#define BOOST_LIB_VERSION &quot;1_73&quot;</div></div><div style=3D"font-=
family:Calibri,Arial,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">=
<br></div><div style=3D"font-family:Calibri,Arial,Helvetica,sans-serif;font=
-size:12pt;color:rgb(0,0,0)">$ b2 -v<br><div>Boost.Jam =C2=A0Version 2015.0=
7. OS=3DLINUX.<br></div><div>=C2=A0 =C2=A0Copyright 1993-2002 Christopher S=
eiwald and Perforce Software, Inc.<br></div><div>=C2=A0 =C2=A0Copyright 200=
1 David Turner.<br></div><div>=C2=A0 =C2=A0Copyright 2001-2004 David Abraha=
ms.<br></div><div>=C2=A0 =C2=A0Copyright 2002-2015 Rene Rivera.<br></div><d=
iv>=C2=A0 =C2=A0Copyright 2003-2015 Vladimir Prus.<br></div><div><br></div>=
</div><div style=3D"font-family:Calibri,Arial,Helvetica,sans-serif;font-siz=
e:12pt;color:rgb(0,0,0)">Thanks in advance</div><font color=3D"#888888"><di=
v style=3D"font-family:Calibri,Arial,Helvetica,sans-serif;font-size:12pt;co=
lor:rgb(0,0,0)"><br></div><div><div id=3D"gmail-m_-5652548607565506557Signa=
ture"><div style=3D"font-family:Calibri,Arial,Helvetica,sans-serif;font-siz=
e:12pt;color:rgb(0,0,0)"><div style=3D"margin:0px;font-size:12pt">Dennis</d=
iv></div></div></div></font></div>

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