[GHC] #14312: Head does not build on Windows with the default make config.

[GHC]

#14312: Head does not build on Windows with the default make config.
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        Reporter:  AndreasK          |                Owner:  (none)
            Type:  bug               |               Status:  patch
        Priority:  normal            |            Milestone:
       Component:  Build System      |              Version:  8.3
      Resolution:                    |             Keywords:
Operating System:  Windows           |         Architecture:
 Type of failure:  Building GHC      |  Unknown/Multiple
  failed                             |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  Phab:D4080
       Wiki Page:                    |
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Comment (by hvr):

 Replying to [comment:11 Phyx-]:
 > Well, the proposal is more to not add the current file's folder
 implicitly to the include list.

 Unfortunately, `capi` kinda follows the lead by the H2010 report:

 > **8.5.1 Standard C Calls**
 >
 > ...
 >
 > **Specification of Header Files** A C header specified in an import
 declaration is always included by `#include "chname"`. There is no
 explicit support for `#include <chname>` style inclusion. The ISO C99
 standard guarantees that any search path that would be used for a
 `#include <chname>` is also used for `#include "chname"` and it is
 guaranteed that these paths are searched after all paths that are unique
 to `#include "chname"`. Furthermore, we require that chname ends in .h to
 make parsing of the specification of external entities unambiguous.

 So `capi` kinda adheres to that by using a `#include <chname>` and
 compensating via a `-I.` path included early.

 (see
 https://www.haskell.org/onlinereport/haskell2010/haskellch8.html#x15-1610008.5)

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14312#comment:12>
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