2014/1/2 Carter Schonwald
it looks like their work around is using ## rather than /**/
Well, actually lens is bypassing the problem by using cpphs, not the C preprocessor. :-P OpenGLRaw is part of the Haskell Platform, and cpphs is not, so I can't simply depend on it. (Licensing issues IIRC?) "Don't do that" is not an option, either, at least not until the binding is auto-generated. If I see this correctly, I really have to do some preprocessor magic (slightly simplified output): ----------------------------------------------------------------------------- svenpanne@svenpanne:~$ cat preprocess.hs #define FOO(x) bla/**/x "x" #define BAR(x) bla##x #x FOO(baz) BAR(boo) svenpanne@svenpanne:~$ gcc -traditional -E -x c preprocess.hs blabaz "baz" bla##boo #boo svenpanne@svenpanne:~$ gcc -E -x c preprocess.hs bla baz "x" blaboo "boo" svenpanne@svenpanne:~$ clang -traditional -E -x c preprocess.hs bla baz "x" bla##boo #boo svenpanne@svenpanne:~$ clang -E -x c preprocess.hs bla baz "x" blaboo "boo" ----------------------------------------------------------------------------- If -traditional is not used, things are simple and consistent, and we can simply use ## and #. Alas, -traditional *is* used, so we can't use ## and # with gcc an we are out of luck with clang. This really sucks, and I consider the clang -traditional behavior a bug: How can you do concatenation/stringification with clang -traditional? One can detect clang via defined(__clang__) and the absence of -traditional via defined(__STDC__), but this doesn't really help here. Any suggestions? I am testing with a local clang 3.4 version (trunk 193323), but I am not sure if this matters.