Vincent,

Thanks for the patch!

Vincent Legoll 写道：
> To fix:
> ./bootstrap.sh: line 28: which: command not found

I'm not convinced that increasing the number of inputs to silence 
(harmless) warnings in the build logs is a way to go.

Is there another reason to add ‘which’?  The resulting boost 
appears identical to one built without it.

Kind regards,

T G-R