id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
6697	toolset darwin-4.7 error: unrecognized option -no-cpp-precomp	Julian Gonggrijp	Vladimir Prus	"I installed gcc 4.7 from macports and added the following to my user-config.jam:

{{{
using darwin
    : 4.7
    : /opt/local/bin/g++-mp-4.7
    ;
}}}

Now when I run

{{{ $ b2 darwin-4.7 }}}

, the build process will stop at compilation stage because of an error:

{{{ g++-mp-4.7: error: unrecognized command line option '-no-cpp-precomp' }}}

`-no-cpp-precomp` was already unrecognized in darwin-4.4, but then it only caused a warning without further obstructing the build process. I don't know at what version of darwin-gcc this changed into an error.

If I repeat the displayed command without the `-no-cpp-precomp` option it works fine. Linking also works without errors.
"	Bugs	closed	To Be Determined	build	Boost 1.49.0	Problem	fixed