Hello,

I'm using boost BJam to build my project with externals librairies.
And I need to define variables if I found headers on the machine.

How can we do that ?

project

    : requirements

    <include>.

    <define>FLAG_NEEDED_TO_DEFINE     => I need to define only if I found header.

    ;


lib library : [ glob *.cpp ] ;



Thanks,
Marc-Antoine ARNAUD