IBM "Classic" XLC C++ V2R5
The fundamental problem I am trying to solve is creating bi-modal source code
that will support UNIX dates beyond 2038; or alternatively will build under
z/OS V2R2.
I have the usual sort of #if/#else/#endif structure based on a macro named
Y2038_LEV2R3. I want to set the macro in an options file because that is where
the LE version is set, so I can group the two things together, something like
DEF (Y2038_LEV2R3=)
TARG(LE,zOSV2R3)
Questions:
1. I'm kind of nervous -- deservedly it turns out -- whether the macro logic is
working as intended. Is there a way to put a compile time message into the
code? I would like something that worked like #error but that generated an
informational message rather than an error. I would even settle for a warning.
I don't see anything like that. Am I missing something?
2. It turns out the macro logic is *not* working. I have the lines above in an
options file (which I know is being processed) and the following C++ code:
#ifdef Y2038_LEV2R3
// Y2038 and LEV2R3+
timeb64 now, timesup;
ftime64(&now);
#else
// No Y2038 and LEV2R1+
#error Y2038_LEVR2R3 not happening!
timeb now, timesup;
ftime(&now);
#endif
and sure enough, the error message is being output by the compiler.
CCN5859 (S) #error directive: Y2038_LEVR2R3 not happening!.
What am I doing wrong?
Thanks,
Charles
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