Thanks for pointing to the appropriate mailing list. This is what appears to be happening. file.chs has a line: #include "file.h" After running: c2hs file.chs file.h gets modified so that it contains just: #include "file.h" So I lose the contents of file.h every time I run c2hs! Running cpp - x c file.h by itself doesn't have that effect so the problem must be caused by c2hs somehow. What is wrong with my c2hs? Perhaps the darcs version has some bugs in it. Ruben On 13/04/2007, at 9:01 AM, Duncan Coutts wrote:
On Fri, 2007-04-13 at 02:37 +1000, Ruben Zilibowitz wrote:
Hi,
I've built and installed c2hs on my Mac OS X system now. I read through the research paper on c2hs available on the website for c2hs and decided I would need to try it out to learn it. But it gives me errors which I am having trouble trying to understand. Here are the error messages:
c2hs file.chs
powerpc-apple-darwin8-gcc-4.0.1: c: No such file or directory powerpc-apple-darwin8-gcc-4.0.1: c: No such file or directory powerpc-apple-darwin8-gcc-4.0.1: warning: '-x -x' after last input file has no effect powerpc-apple-darwin8-gcc-4.0.1: no input files c2hs: Error during preprocessing custom header file
c2hs runs cpp -x c ${header}
for the header file you specify. You can either specify a header file on the commend line or use #include's in the .chs file. c2hs should generate a .h file itself in that case but it looks like it isn't for some reason. You can find out what it is really doing by running:
c2hs --dump trace file.chs
btw, the better mailing list for this stuff is the c2hs mailing list: c2hs@haskell.org
Duncan