[Qt-interest] setting makfile variable from .pro file

[Pete Black]

Hey guys,

Anyone know a good way to set an environment variable used in the qmake
generated makefile from the .pro file?

For instance I would like to set a default value for $INSTALL_ROOT from
my .pro file like so:

  INSTALL_ROOT = "/usr/local"

and have it set in the generated makefile. The only way I know right now
is to pass the value when calling make:

  make INSTALL_ROOT="/usr/local" all

Can this be done by defining a new feature in a .prf file perhaps?

Thanks,
Pete