cvs commit: fptools/ghc/compiler/main DriverPipeline.hs

[Sigbjorn Finne]

sof         2001/07/10 18:27:04 PDT

  Modified files:
    ghc/compiler/main    DriverPipeline.hs 
  Log:
  Do away with that 'ineffective CPP' malarkey. run_phase now returns
  the FilePath of its output file; in the event CPP isn't required,
  we then just return the input file. (The extra LINE pragma that
  the 'ineffective CPP' inserted was a NOP).
  
  Appears to speed things up a bit; mingw/Win32 builds no longer need to
  do a slow copyFile operation - other plats are saved from doing a
  System.system call.
  
  BTW, there's an opportunity to shorten the critical path for .hs files
  some in the driver: at the moment 'unlit' is run over all input.
  
  Revision  Changes    Path
  1.87      +27 -43    fptools/ghc/compiler/main/DriverPipeline.hs