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#include
directive are combined into a header name (6.10.2).#include
processing (6.10.2).
GCC imposes a limit of 200 nested #include
s.
STDC #pragma
directive (6.10.6).__DATE__
and __TIME__
when respectively, the date and time of translation are not available (6.10.8).
If the date and time are not available, __DATE__
expands to "??? ?? ????"
and __TIME__
expands to "??:??:??"
.