I have some more results regarding Windows platform to report. I tried with GCC-4.4.0 that's shipped with QT4.6 SDK on the same Win XP sp3 and received some different errors/warnings as pasted below: gcc.compile.c++ bin.v2\libs\chrono\build\gcc-mingw-4.4.0\debug\link-static\runtime-link- static\threading-multi\chrono.o In file included from ./boost/chrono/chrono.hpp:73, from libs\chrono\src\chrono.cpp:13: ./boost/ratio.hpp:66: warning: integer constant is too large for 'long' type ./boost/ratio.hpp:67: warning: integer constant is too large for 'long' type ./boost/ratio.hpp:68: warning: integer constant is too large for 'long' type ./boost/ratio.hpp:79: warning: integer constant is too large for 'long' type ./boost/ratio.hpp:80: warning: integer constant is too large for 'long' type ./boost/ratio.hpp:81: warning: integer constant is too large for 'long' type ./boost/ratio.hpp:66: error: a function call cannot appear in a constant-expression ./boost/ratio.hpp:66: error: a function call cannot appear in a constant-expression ./boost/ratio.hpp:66: error: template argument 1 is invalid ./boost/ratio.hpp:66: error: template argument 2 is invalid ./boost/ratio.hpp:66: error: invalid type in declaration before ';' token ./boost/ratio.hpp:67: error: a function call cannot appear in a constant-expression ./boost/ratio.hpp:67: error: a function call cannot appear in a constant-expression ./boost/ratio.hpp:67: error: template argument 1 is invalid ./boost/ratio.hpp:67: error: template argument 2 is invalid ./boost/ratio.hpp:67: error: invalid type in declaration before ';' token ./boost/ratio.hpp:68: error: a function call cannot appear in a constant-expression ./boost/ratio.hpp:68: error: a function call cannot appear in a constant-expression ./boost/ratio.hpp:68: error: template argument 1 is invalid ./boost/ratio.hpp:68: error: template argument 2 is invalid ./boost/ratio.hpp:68: error: invalid type in declaration before ';' token ./boost/ratio.hpp:69: error: a function call cannot appear in a constant-expression ./boost/ratio.hpp:69: error: a function call cannot appear in a constant-expression ./boost/ratio.hpp:69: error: template argument 1 is invalid ./boost/ratio.hpp:69: error: template argument 2 is invalid ./boost/ratio.hpp:69: error: invalid type in declaration before ';' token ./boost/ratio.hpp:70: error: a function call cannot appear in a constant-expression ./boost/ratio.hpp:70: error: a function call cannot appear in a constant-expression ./boost/ratio.hpp:70: error: template argument 1 is invalid ./boost/ratio.hpp:70: error: template argument 2 is invalid ./boost/ratio.hpp:70: error: invalid type in declaration before ';' token ./boost/ratio.hpp:71: error: a function call cannot appear in a constant-expression ./boost/ratio.hpp:71: error: a function call cannot appear in a constant-expression ./boost/ratio.hpp:71: error: template argument 1 is invalid ./boost/ratio.hpp:71: error: template argument 2 is invalid ./boost/ratio.hpp:71: error: invalid type in declaration before ';' token ./boost/ratio.hpp:72: error: a function call cannot appear in a constant-expression ./boost/ratio.hpp:72: error: a function call cannot appear in a constant-expression ./boost/ratio.hpp:72: error: template argument 1 is invalid ./boost/ratio.hpp:72: error: template argument 2 is invalid ./boost/ratio.hpp:72: error: invalid type in declaration before ';' token ./boost/ratio.hpp:73: error: a function call cannot appear in a constant-expression ./boost/ratio.hpp:73: error: a function call cannot appear in a constant-expression ./boost/ratio.hpp:73: error: template argument 1 is invalid ./boost/ratio.hpp:73: error: template argument 2 is invalid ./boost/ratio.hpp:73: error: invalid type in declaration before ';' token ./boost/ratio.hpp:74: error: a function call cannot appear in a constant-expression ./boost/ratio.hpp:74: error: a function call cannot appear in a constant-expression ./boost/ratio.hpp:74: error: template argument 1 is invalid ./boost/ratio.hpp:74: error: template argument 2 is invalid ./boost/ratio.hpp:74: error: invalid type in declaration before ';' token ./boost/ratio.hpp:75: error: a function call cannot appear in a constant-expression ./boost/ratio.hpp:75: error: a function call cannot appear in a constant-expression ./boost/ratio.hpp:75: error: template argument 1 is invalid ./boost/ratio.hpp:75: error: template argument 2 is invalid ./boost/ratio.hpp:75: error: invalid type in declaration before ';' token ./boost/ratio.hpp:76: error: a function call cannot appear in a constant-expression ./boost/ratio.hpp:76: error: a function call cannot appear in a constant-expression ./boost/ratio.hpp:76: error: template argument 1 is invalid ./boost/ratio.hpp:76: error: template argument 2 is invalid ./boost/ratio.hpp:76: error: invalid type in declaration before ';' token ./boost/ratio.hpp:77: error: a function call cannot appear in a constant-expression ./boost/ratio.hpp:77: error: a function call cannot appear in a constant-expression ./boost/ratio.hpp:77: error: template argument 1 is invalid ./boost/ratio.hpp:77: error: template argument 2 is invalid ./boost/ratio.hpp:77: error: invalid type in declaration before ';' token ./boost/ratio.hpp:78: error: a function call cannot appear in a constant-expression ./boost/ratio.hpp:78: error: a function call cannot appear in a constant-expression ./boost/ratio.hpp:78: error: template argument 1 is invalid ./boost/ratio.hpp:78: error: template argument 2 is invalid ./boost/ratio.hpp:78: error: invalid type in declaration before ';' token ./boost/ratio.hpp:79: error: a function call cannot appear in a constant-expression ./boost/ratio.hpp:79: error: a function call cannot appear in a constant-expression ./boost/ratio.hpp:79: error: template argument 1 is invalid ./boost/ratio.hpp:79: error: template argument 2 is invalid ./boost/ratio.hpp:79: error: invalid type in declaration before ';' token ./boost/ratio.hpp:80: error: a function call cannot appear in a constant-expression ./boost/ratio.hpp:80: error: a function call cannot appear in a constant-expression ./boost/ratio.hpp:80: error: template argument 1 is invalid ./boost/ratio.hpp:80: error: template argument 2 is invalid ./boost/ratio.hpp:80: error: invalid type in declaration before ';' token ./boost/ratio.hpp:81: error: a function call cannot appear in a constant-expression ./boost/ratio.hpp:81: error: a function call cannot appear in a constant-expression ./boost/ratio.hpp:81: error: template argument 1 is invalid ./boost/ratio.hpp:81: error: template argument 2 is invalid ./boost/ratio.hpp:81: error: invalid type in declaration before ';' token ./boost/ratio.hpp:131: error: a function call cannot appear in a constant-expression ./boost/ratio.hpp:132: error: 'boost::detail::ll_add::max' cannot be initialized by a non-constant expression when being declared ./boost/ratio.hpp:151: error: a function call cannot appear in a constant-expression ./boost/ratio.hpp:152: error: 'boost::detail::ll_add::max' cannot be initialized by a non-constant expression when being declared ./boost/ratio.hpp:167: error: a function call cannot appear in a constant-expression ./boost/ratio.hpp:168: error: 'boost::detail::ll_sub::max' cannot be initialized by a non-constant expression when being declared ./boost/ratio.hpp:187: error: a function call cannot appear in a constant-expression ./boost/ratio.hpp:188: error: 'boost::detail::ll_sub::max' cannot be initialized by a non-constant expression when being declared ./boost/ratio.hpp:200: error: a function call cannot appear in a constant-expression ./boost/ratio.hpp:201: error: 'boost::detail::ll_mul::min' cannot be initialized by a non-constant expression when being declared ./boost/ratio.hpp:202: error: 'boost::detail::ll_mul::max' cannot be initialized by a non-constant expression when being declared In file included from libs\chrono\src\chrono.cpp:13: ./boost/chrono/chrono.hpp:945: error: a function call cannot appear in a constant-expression ./boost/chrono/chrono.hpp:945: error: a function call cannot appear in a constant-expression ./boost/chrono/chrono.hpp:945: error: template argument 1 is invalid ./boost/chrono/chrono.hpp:945: error: template argument 2 is invalid ./boost/chrono/chrono.hpp:945: error: template argument 2 is invalid ./boost/chrono/chrono.hpp:946: error: typedef name may not be a nested-name-specifier ./boost/chrono/chrono.hpp:946: error: expected ';' before 'rep' ./boost/chrono/chrono.hpp:947: error: typedef name may not be a nested-name-specifier ./boost/chrono/chrono.hpp:947: error: expected ';' before 'period' In file included from libs\chrono\src\chrono.cpp:27: libs\chrono\src\/win/chrono.cpp:34: error: 'monotonic_clock' has not been declared libs\chrono\src\/win/chrono.cpp:34: error: expected constructor, destructor, or type conversion before 'monotonic_clock' libs\chrono\src\/win/chrono.cpp:112: error: expected '}' at end of input libs\chrono\src\/win/chrono.cpp:112: error: expected '}' at end of input libs\chrono\src\/win/chrono.cpp:26: warning: '<unnamed>::nanosecs_per_tic' defined but not used ./boost/system/error_code.hpp:208: warning: 'boost::system::system_category' defined but not used ./boost/system/error_code.hpp:209: warning: 'boost::system::generic_category' defined but not used ./boost/system/error_code.hpp:214: warning: 'boost::system::posix_category' defined but not used ./boost/system/error_code.hpp:215: warning: 'boost::system::errno_ecat' defined but not used ./boost/system/error_code.hpp:216: warning: 'boost::system::native_ecat' defined but not used -----Original Message----- From: Tan, Tom (Shanghai) Sent: 2009-12-09 13:41 To: 'boost-users@lists.boost.org' Cc: 'vicente.botet@wanadoo.fr' Subject: RE: [chrono] New Features + Bug fixes + Updated + documentation

Date: Tue, 8 Dec 2009 23:46:18 +0100 From: "vicente.botet" Hi,

I'm pleased to annonce the new version of the Boost.Chrono library. Even if the library is not yet ready for review I wanted to share it with you.

For the moment I'm not able to test it on Windows and Mac platforms. Could you check if there are some regressions on Windows or on Mac platforms?

Thanks for continuing this library, I've using Beman's version from the sandbox mainly for the process_timer class for benchmarking code efficiency. I just copied your code from the sandbox and compiled it against the latest boost trunk version with VC++10 on WinXP sp3, and received several occurrences of " error C3861: 'INTMAX_C': identifier not found " among others as attached. There seems to be missing some macro guards that could guarantee a correct import of 'INTMAX_C' from boost/cstdint.hpp.