Hi there, hugs and ghc understand much the same, but a few (often subtle) differences remain. Since I'd be interested in developing code for both, I'm looking for a way to directly take care of these differences in my code. Ghc offers a commandline option '-cpp' which will allow for '#ifdef' and other preprocessor directives. When testing it, it worked ok. Hugs seems to offer a similar feature '-F<cmd>'. When testing it, however, it did not work. 'cpp' seems to be called, but it seems to leave characters in the code that can't be dealt w/ by hugs. Moreover, it seems to called on every input file (i.e. the prelude). --- snip --- till@atlan:~/tmp> hugs -Fcpp gammel.hs __ __ __ __ ____ ___ _________________________________________ || || || || || || ||__ Hugs 98: Based on the Haskell 98 standard ||___|| ||__|| ||__|| __|| Copyright (c) 1994-1999 ||---|| ___|| World Wide Web: http://haskell.org/hugs || || Report bugs to: hugs-bugs@haskell.org || || Version: February 2000 _________________________________________ Haskell 98 mode: Restart with command line option -98 to enable extensions Reading file "/usr/local/share/hugs/lib/Prelude.hs": Parsing ERROR "/usr/local/share/hugs/lib/Prelude.hs" (line 1): Syntax error in input (unexpected symbol "#") FATAL ERROR: Unable to load prelude --- snap --- When trying to remove the '#' etc. left in the code by giving '-P' to cpp it still doesn't work. --- snip hackcpp.sh --- cpp -P -D__HUGS__ $1 --- snap hackcpp.sh --- Here's what happens now: --- snip --- till@atlan:~/tmp> hugs -Fhackcpp.sh gammel.hs __ __ __ __ ____ ___ _________________________________________ || || || || || || ||__ Hugs 98: Based on the Haskell 98 standard ||___|| ||__|| ||__|| __|| Copyright (c) 1994-1999 ||---|| ___|| World Wide Web: http://haskell.org/hugs || || Report bugs to: hugs-bugs@haskell.org || || Version: February 2000 _________________________________________ Haskell 98 mode: Restart with command line option -98 to enable extensions Reading file "/usr/local/share/hugs/lib/Prelude.hs": Parsing/usr/local/share/hugs/lib/Prelude.hs:289:22: missing terminating ' character /usr/local/share/hugs/lib/Prelude.hs:290:28: missing terminating ' character /usr/local/share/hugs/lib/Prelude.hs:335:58: missing terminating ' character /usr/local/share/hugs/lib/Prelude.hs:357:63: missing terminating ' character /usr/local/share/hugs/lib/Prelude.hs:358:29: missing terminating ' character /usr/local/share/hugs/lib/Prelude.hs:361:63: missing terminating ' character /usr/local/share/hugs/lib/Prelude.hs:489:17: missing terminating ' character ERROR "/usr/local/share/hugs/lib/Prelude.hs" (line 207): Syntax error in expression (unexpected `=') FATAL ERROR: Unable to load prelude --- snap --- My question now is, whether there is a decent (and comfortable) way of dealing w/ this issue or whether I will have to preprocess the files myself manually? Thanks -- Till -- e-mail: reverse(net dot doerges at till) | ENCRYPTED | pgp/gpg: keys via keyserver or my homepage | MAIL IS | www: http://www.doerges.net | WELCOME! |