These are the issues I have discovered after examining the build log: a.. Error message during configuration check: error: No best alternative for libs/context/build/asm/make_x86_64_sysv_elf_gas.o next alternative: required properties: <threading>multi b.. Warning message during configuration check even after installing developer/icu and library/icu packages: - Boost.Locale needs either iconv or ICU library to be built. c.. Lots of error messages during Boost.Fiber build. d.. Error message during Boost.Python build. I am attaching a copy of the build log for your perusal. I have also adjusted the build command to include “threading=multi”. From: Leo Carreon Sent: Sunday, February 26, 2017 12:40 PM To: Boost Users Mailing List Subject: Building Boost 1.63.0 with Oracle Developer Studio 12.5 Hi, Is building Boost 1.63.0 with Oracle Developer Studio 12.5 supported? I tried building it using the following commands but I get a lot of errors: ./bootstrap.sh --with-toolset=sun ./b2 link=shared runtime-link=shared address-model=64 threading=multi variant=release cxxflags="-std=c++14" linkflags="-std=c++14" FYI, I’m building on Oracle Solaris 11.3 running on a x86-64 virtual machine. Am I missing something? Kind regards, Leo