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Duncan Coutts authored
We allow extra rgs and the location of programs to be given to the build and haddock commands, not just at configure time. The code to do this is now simpler and more general. This should not be the default use mode however since it involves configuring the programs each time where as doing it at configure time allows it to be done once and saved. Further, specifying a different version of the program at build time than at configure time is likely to fail, especially for the compiler programs. Changing the compiler really requires reconfiguring.
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