我明白了，
C:\Documents and Settings\IBM-User\Desktop\b>runhaskell Setup configure
Configuring bitset-1.4.5...
Setup: Missing dependency on a foreign library:
* Missing C library: gmp
This problem can usually be solved by installing the system package that
provides this library (you may need the "-dev" version). If the library is
already installed but in a non-standard location then you can use the flags
--extra-include-dirs= and --extra-lib-dirs= to specify where it is.
虽然，正如 Daniel Fischer 指出的那样，我似乎在integer-gmp-0.4.0.0这里安装了：C:\Program Files\Haskell Platform\2012.4.0.0\lib
尝试--extra-lib-dirsand--extra-include-dirs产生了相同的结果。
我会很感激任何想法。