conflicting Block.h on Snow Leopard

[PaulLiu]

Using GHC to compile C programs that includes <CoreServices/CoreServices.h> will result in the following error:

In file included from /System/Library/Frameworks/CoreServices.framework/Frameworks/CarbonCore.framework/Headers/FSEvents.h:28,
                 from /System/Library/Frameworks/CoreServices.framework/Frameworks/CarbonCore.framework/Headers/CarbonCore.h:218,
                 from /System/Library/Frameworks/CoreServices.framework/Frameworks/AE.framework/Headers/AE.h:20,
                 from /System/Library/Frameworks/CoreServices.framework/Headers/CoreServices.h:21,

                 from test.c:1:0: 

/Library/Frameworks/GHC.framework/Versions/610/usr/lib/ghc-6.10.4/include/Block.h:51:0:
     error: expected specifier-qualifier-list before ‘StgPtr’

...

This is because somewhere down CoreServices.h it includes Block.h, and expects it to be /usr/include/Block.h, which is a new file introduced since Snow Leopard (OS X 10.6). This is in direct conflict to the Block.h under GHC's include directory, which is somehow searched prior to the system directory.

[simonmar]

Block.h is now rts/storage/Block.h in 6.12.1.