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| author |  Hendrik Tews <hendrik@askra.de> | 2016-11-17 13:06:37 +0100 |
|---|---|---|
| committer | Hendrik Tews <hendrik@askra.de> | 2016-11-17 13:06:37 +0100 |
| commit | 42312958454c0fcc700586781084510f7da0dbcd (patch) | |
| tree | db98c263a285200bcfcdeee7ed00545eceedb9c6 /coq/coq-compile-common.el | |
| parent | 94e8ce4389c1d9926a629d30075dae64bee84779 (diff) | |
fix parallel compilation for the unlikely case of identical time stamps
Since version 24.3 Emacs supports pico second precision in time
stamps and Emacs on ext4 seems to have a time precision of 5
milliseconds for file time stamps. It is therefor quite unlikely
that a source and an object file have the same time stamp. This
patch fixes parallel compilation for these corner cases and adds
a few hundred test cases to test all combinations where some
files have identical time stamps. On Emacs older than 24.3 or on
file systems with a low precision (eg. ext3) this patch can cause
additional compilations.
Diffstat (limited to 'coq/coq-compile-common.el')
| -rw-r--r-- | coq/coq-compile-common.el | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/coq/coq-compile-common.el b/coq/coq-compile-common.el index a6b5abb3..1840f9a0 100644 --- a/coq/coq-compile-common.el +++ b/coq/coq-compile-common.el @@ -392,8 +392,7 @@ modules are matched separately with `coq-require-id-regexp'") A time value is a list of two integers as returned by `file-attributes'. The first integer contains the upper 16 bits and the second the lower 16 bits of the time." - (or (time-less-p time-1 time-2) - (equal time-1 time-2))) + (not (time-less-p time-2 time-1))) (defun coq-max-dep-mod-time (dep-mod-times) "Return the maximum in DEP-MOD-TIMES. |