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Diffstat (limited to 'gcc/doc/cpp.texi')
| -rw-r--r-- | gcc/doc/cpp.texi | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/gcc/doc/cpp.texi b/gcc/doc/cpp.texi index c019adb..e693942 100644 --- a/gcc/doc/cpp.texi +++ b/gcc/doc/cpp.texi @@ -2128,6 +2128,17 @@ use. This macro is defined, with value 2, when @option{-fstack-protector-all} is in use. +@item __TIMESTAMP__ +This macro expands to a string constant that describes the date and time +of the last modification of the current source file. The string constant +contains abbreviated day of the week, month, day of the month, time in +hh:mm:ss form, year and looks like @code{@w{"Sun Sep 16 01:03:52 1973"}}. +If the day of the month is less than 10, it is padded with a space on the left. + +If GCC cannot determine the current date, it will emit a warning message +(once per compilation) and @code{__TIMESTAMP__} will expand to +@code{@w{"??? ??? ?? ??:??:?? ????"}}. + @end table @node System-specific Predefined Macros |