Do ghc and ghci handle CPP differently? In ghci, I'm getting "phase `C
pre-processor' failed (exitcode = 1)" when I #include the same .h file more
than once in a module. I also get warnings about a symbol being redefined,
although I'm careful to #undef them it the end of the include file. All
works fine with ghc.
Here's my code:
#define APPLICATIVE Vec1
#include "ApplicativeNumeric-inc.hs"
#define APPLICATIVE Vec2
#include "ApplicativeNumeric-inc.hs"
#define APPLICATIVE Vec3
#include "ApplicativeNumeric-inc.hs"
#define APPLICATIVE Vec4
#include "ApplicativeNumeric-inc.hs"
And here are the error messages in ghci:
Graphics/Shady/Vec.hs:134:0:
error: ApplicativeNumeric-inc.hs: No such file or directory
Graphics/Shady/Vec.hs:136:0: warning: "APPLICATIVE" redefined
Graphics/Shady/Vec.hs:133:0:
warning: this is the location of the previous definition
Graphics/Shady/Vec.hs:139:0: warning: "APPLICATIVE" redefined
Graphics/Shady/Vec.hs:136:0:
warning: this is the location of the previous definition
Graphics/Shady/Vec.hs:142:0: warning: "APPLICATIVE" redefined
Graphics/Shady/Vec.hs:139:0:
warning: this is the location of the previous definition
phase `C pre-processor' failed (exitcode = 1)
Any ideas? Suggestions?
- Conal
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