When using... /opt/studio10/SUNWspro/bin/CC -V CC: Sun C++ 5.7 Patch 117830-04 2005/09/14 On uname -a SunOS solaris 5.8 Generic_108528-29 sun4u sparc SUNW,Sun-Fire-V250 The compiler works much better when I effectively back out the last patch to this file. Changing... if (__SUNPRO_CC < 0x570) to... if (__SUNPRO_CC <= 0x570) *** boost/config/compiler/sunpro_cc.hpp.orig Tue Mar 22 02:55:03 2005 --- boost/config/compiler/sunpro_cc.hpp Thu Oct 20 18:46:18 2005 *************** *** 57,63 **** # define BOOST_NO_INTEGRAL_INT64_T # endif ! # if (__SUNPRO_CC < 0x570) # define BOOST_NO_TEMPLATE_TEMPLATES // see http://lists.boost.org/MailArchives/boost/msg47184.php // and http://lists.boost.org/MailArchives/boost/msg47220.php --- 57,63 ---- # define BOOST_NO_INTEGRAL_INT64_T # endif ! # if (__SUNPRO_CC <= 0x570) # define BOOST_NO_TEMPLATE_TEMPLATES // see http://lists.boost.org/MailArchives/boost/msg47184.php // and http://lists.boost.org/MailArchives/boost/msg47220.php