[1889] in Athena Bugs
update on last saber bug report (preprocessor problems)
daemon@ATHENA.MIT.EDU (Ken Raeburn)
Tue Mar 14 02:13:00 1989
Date: Tue, 14 Mar 89 02:12:42 EST
From: Ken Raeburn <raeburn@ATHENA.MIT.EDU>
To: bugs@ATHENA.MIT.EDU
After the example I just sent, I tried some ways to get around it:
* Load with -U__STDC__ since that would cause the /**/ version to be
loaded. This (reasonably, with option "ansi" set) failed to work.
* Turn off option "ansi", and repeat the last attempted "load" command
-- which happened to have -U__STDC__. The "##" version of the macro
was used. The source for the macro is:
#if defined(__STDC__) && !defined(UNIXCPP)
#define GetReq(name, req) \
WORD64ALIGN\
if ((dpy->bufptr + SIZEOF(x##name##Req)) > dpy->bufmax)\
_XFlush(dpy);\
req = (x##name##Req *)(dpy->last_req = dpy->bufptr);\
req->reqType = X_##name;\
req->length = (SIZEOF(x##name##Req))>>2;\
dpy->bufptr += SIZEOF(x##name##Req);\
dpy->request++
#else /* non-ANSI C uses empty comment instead of "##" for token concatenation
*/
#define GetReq(name, req) \
WORD64ALIGN\
if ((dpy->bufptr + SIZEOF(x/**/name/**/Req)) > dpy->bufmax)\
_XFlush(dpy);\
req = (x/**/name/**/Req *)(dpy->last_req = dpy->bufptr);\
req->reqType = X_/**/name;\
req->length = (SIZEOF(x/**/name/**/Req))>>2;\
dpy->bufptr += SIZEOF(x/**/name/**/Req);\
dpy->request++
#endif
...so as far as I can tell, it should have used the second version.
PCC appears to.
-- Ken
