[GHC] #5218: Add unpackCStringLen# to create Strings from string literals

[GHC]

#5218: Add unpackCStringLen# to create Strings from string literals
-------------------------------------+-------------------------------------
        Reporter:  tibbe             |                Owner:  thoughtpolice
            Type:  feature request   |               Status:  patch
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  7.0.3
      Resolution:                    |             Keywords:  strings
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Runtime           |  Unknown/Multiple
  performance bug                    |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #5877 #10064      |  Differential Rev(s):  Phab:D2443
  #11312, #9719                      |
       Wiki Page:                    |
-------------------------------------+-------------------------------------

Comment (by phadej):

 Replying to [comment:84 hsyl20]:
 > I have just sketched a different proposal here:
 https://ghc.haskell.org/trac/ghc/wiki/StaticData
 >
 > IMO it is more generic and the different parts can be implemented
 independently.

 Note: Not all GHC have `TemplateHaskell`, especially stage 1 GHC.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/5218#comment:85>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler