I am upgrading a port where only certain installed releases will prevent the building of the upgraded port.
Is there a way to use conflicts_build from the conflicts_build PortGroup with
only certain installed releases? Maybe it could be done by using a pre-build
{} tcl block?
Is there a global variable available that is set to the installed version
number?
And is there an easy way to tell if a port is already installed before
upgrading?
Rob
