id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
13433	b2 emits strange error message when building 1.66.0 on windows 10 against very new visual studio	ivandavid14@…	Vladimir Prus	"Hello, I am try to build boost against the latest version of visual studio (15.5.5, I know that 15.5.6 is out though, shouldn't be too different) and I am getting this error

failed to write command file!

when running this command

b2.exe --hash address-model=32 debug --stagedir=bin\v141\Win32\ -a --toolset=msvc-14.1 cxxflags=""/D""_WIN32_WINNT=0x0600"" /std:c++17 /Qspectre /D""_HAS_AUTO_PTR_ETC=1""""

It has passed sometimes however it frequently doesn't. Its unclear what exactly I am doing that causes this error

Here are the things I've done step by step

1: Download boost source code and unzip it

2: run bootstrap.bat

3: run above cmd line from the visual studio developer command prompt (this has failed when using powershell too)

this was the last few things that were printed
Info: Boost.Config is older than your compiler version - probably nothing bad will happen - but you may wish to look for an update Boost version.  Define BOOST_CONFIG_SUPPRESS_OUTDATED_MESSAGE to suppress this message.
msvc.archive bin.v2\libs\date_time\build\a1668ad3e8cba9b190515cabd106a4cf\libboost_date_time-vc141-mt-gd-x32-1_66.lib
common.copy bin\v141\Win32\lib\libboost_date_time-vc141-mt-gd-x32-1_66.lib
bin.v2\libs\date_time\build\a1668ad3e8cba9b190515cabd106a4cf\libboost_date_time-vc141-mt-gd-x32-1_66.lib
        1 file(s) copied.
compile-c-c++ bin.v2\libs\exception\build\a1668ad3e8cba9b190515cabd106a4cf\clone_current_exception_non_intrusive.obj
clone_current_exception_non_intrusive.cpp
Info: Boost.Config is older than your compiler version - probably nothing bad will happen - but you may wish to look for an update Boost version.  Define BOOST_CONFIG_SUPPRESS_OUTDATED_MESSAGE to suppress this message.
failed to write command file!

I am unsure what is causing this. I don't think I am passing in parameters to the cxx flags incorrectly. I am filing a ticket because I suspect there might be a bug in b2 or bjam."	Bugs	new	To Be Determined	build	Boost 1.66.0	Problem		b2 bjam