I've read the boost build manual section on building with STLPort and a number of other posts, but nothing seems to help. I have modified user_config.jam to contain using stlport : 5.1.6 : c:\\projects\\STLPort-5.1.6\\stlport c:\\projects\\STLPort-5.1.6\\lib ; and am building with bjam --build-dir="c:\temp\build-boost" --toolset=msvc-8.0 stdlib=stlport-5.1.6 threading=multi --with-serialization -a -d2 release stage However, it fails to build libboost_serialization-vc80-mt-p-1.36.0.lib, with errors propagating from ====== BEGIN OUTPUT ====== EXIT STATUS: -1073741515 ====== END OUTPUT ====== ...failed testing.capture-output c:\projects\build-boost\boost\bin.v2\libs\config\test\all\no_std_locale_ pass.test\msvc-8.0\release\stdlib-stlport-5.1.6\threading-multi\no_std_l ocale_pass.run... I've tried various versions of Boost and STLPort in various combinations, all with the same results. Any insights much appreciated. Kind regards Richard Gould This email and any attachments are confidential and may also be privileged. If you are not the addressee, do not disclose, copy, circulate or in any other way use or rely on the information contained in this email or any attachments. If received in error, notify the sender immediately and delete this email and any attachments from your system. Emails cannot be guaranteed to be secure or error free as the message and any attachments could be intercepted, corrupted, lost, delayed, incomplete or amended. Standard Chartered PLC and its subsidiaries do not accept liability for damage caused by this email or any attachments and may monitor email traffic. Standard Chartered PLC is incorporated in England with limited liability under company number 966425 and has its registered office at 1 Aldermanbury Square, London, EC2V 7SB. Standard Chartered Bank ("SCB") is incorporated in England with limited liability by Royal Charter 1853, under reference ZC18. The Principal Office of SCB is situated in England at 1 Aldermanbury Square, London EC2V 7SB. In the United Kingdom, SCB is authorised and regulated by the Financial Services Authority under FSA register number 114276. If you are receiving this email from SCB outside the UK, please click http://www.standardchartered.com/global/email_disclaimer.html to refer to the information on other jurisdictions.