| So what's going on? How can the goal be achieved?
I don't know, but here's a different suggestion, using
bzip2 (you could do the same with zlib for .gz files):
use the foreign import mechanism to make BZ2_bzopen,
BZ2_bzwrite and BZ2_bzclose available in your program.
Then:
do bz2 <- bzopen "output.bz2" "w"
let chars_to_write = ... :: String
bzwrite bz2 (packString chars_to_write) (length chars_to_write)
-- the above as many times as you like
bzclose bz2
and link your program with libbz2.a or libbz2.so.
Almost the same trick works with the zlib library for
directly reading/writing .gz files.
This strikes me as far more convenient than messing round
with pipes, etc.
J
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