[Haskell-cafe] Using stringize and string concatenation in ghc preprocessing

[Richard A. O'Keefe]

On 19/01/17 12:04 PM, Ben Franksen wrote:
> Besides, GNU's cpp is certainly GPL licensed; I wonder why different
> standards are applied here.

GNU's cpp is not the only one around.
I have the Sun/Oracle compilers, which don't use GNU cpp;
I had the Intel compilers, which don't use GNU cpp;
there's the preprocessor that comes with lcc, which isn't GNU cpp;
and I also have mcpp and warp (in D) and jcpp (in Java).
There must be others out there.