cvs commit: fptools configure.ac fptools/ghc/compiler/cmm CLabel.hs fptools/ghc/compiler/nativeGen AsmCodeGen.lhs PprMach.hs fptools/ghc/driver/mangler ghc-asm.lprl fptools/ghc/rts StgCRun.c

[Wolfgang Thaller]

wolfgang    2005/01/22 22:10:25 PST

  Modified files:
    .                    configure.ac 
    ghc/compiler/cmm     CLabel.hs 
    ghc/compiler/nativeGen AsmCodeGen.lhs PprMach.hs 
    ghc/driver/mangler   ghc-asm.lprl 
    ghc/rts              StgCRun.c 
  Log:
  Add support for the dead code stripping feature of recent Apple linkers.
  If your code is compiled using the NCG, you can now specify
  -optl-W,-dead_strip on the GHC command line when linking.
  It will have basically the same effect as using split-objs to build the
  libraries.
  
  Advantages over split-objs:
      * No evil perl script involved
      * Requires no special handling when building libraries
  
  Disadvantages:
      * The current version of Apple's linker is slow when given the
        -dead_strip flag. _REALLY_ slow.
      * Mac OS X only.
  
  This works by making the NCG emit the .subsections_via_symbols directive.
  Additionally, we have to add an extra label at the top of every info table,
  and make sure that the entry code references it (otherwise the info table
  will be considered part of the preceding entry code).
  The mangler just removes the .subsections_via_symbols directive.
  
  Revision  Changes    Path
  1.104     +16 -0     fptools/configure.ac
  1.13      +10 -0     fptools/ghc/compiler/cmm/CLabel.hs
  1.66      +8 -1      fptools/ghc/compiler/nativeGen/AsmCodeGen.lhs
  1.6       +26 -3     fptools/ghc/compiler/nativeGen/PprMach.hs
  1.120     +6 -1      fptools/ghc/driver/mangler/ghc-asm.lprl
  1.48      +5 -0      fptools/ghc/rts/StgCRun.c