qcc.jam file could use a minor update for ar

[steve.lemay@…]

The qcc.jam file is apparently intended for building on a QNX OS hosted target. It is common for the QNX source to be cross compiled on MS Windows and the default archive utility is not available. Would you please add a comment and alternate solution around line 220 like the following. This would probably save new Boost users from having to track down a solution to this in the future.

# Modify archive command for cross-compiling for QNX NTO using a MS Windows hosted environment (x86 target used as example). # ntox86-ar rc "$(<)" "$(>)"

[tvaneerd@…]

This can be fixed by using

 "$(CONFIG_COMMAND)" -A "$(<)" "$(>)" 

in place of

 ar rc "$(<)" "$(>)"

as qcc (which is CONFIG_COMMAND) can do the archiving itself (with -A).

see ticket #7705