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| author | Jan Engelhardt <jengelh@inai.de> | 2022-05-23 13:47:02 -0700 |
|---|---|---|
| committer | Karl Berry <karl@freefriends.org> | 2022-05-23 13:47:02 -0700 |
| commit | f9fdcdfd0bab5964e1cf89e67e6483fb6db8c2b5 (patch) | |
| tree | 020e91d8090cd166fd50dce5257dd489deeeb98a | |
| parent | fee9a828bcc968656edfc89e38b157c28d6335f0 (diff) | |
| download | automake-f9fdcdfd0bab5964e1cf89e67e6483fb6db8c2b5.tar.gz | |
deps: create empty file instead of dummy file.
This change is per an automake thread, see both before and after:
https://lists.gnu.org/archive/html/automake/2022-05/msg00006.html
* lib/am/depend.am ($(am__depfiles_remade)): create empty files
for dependencies instead of files with a line '# dummy'. Turns out
this is noticeably faster.
* THANKS: update Jan's email address.
* NEWS: mention this.
| -rw-r--r-- | NEWS | 2 | ||||
| -rw-r--r-- | THANKS | 2 | ||||
| -rw-r--r-- | lib/am/depend.am | 4 |
3 files changed, 6 insertions, 2 deletions
@@ -25,6 +25,8 @@ New in 1.17: - Generated file timestamp checks now handle filesystems with sub-second timestamp granularity dynamically. + - Dependency files are now empty, instead of '# dummy', for speed. + - Systems with non-POSIX "rm -f" behavior are now supported, and intent to drop support for them has been reversed. The ACCEPT_INFERIOR_RM_PROGRAM setting no longer exists. @@ -177,7 +177,7 @@ James Bostock james.bostock@gmail.com James Henstridge james@daa.com.au James R. Van Zandt jrv@vanzandt.mv.com James Youngman jay@gnu.org -Jan Engelhardt jengelh@medozas.de +Jan Engelhardt jengelh@inai.de Janos Farkas chexum@shadow.banki.hu Jared Davis abiword@aiksaurus.com Jason DeVinney jasondevinney@gmail.com diff --git a/lib/am/depend.am b/lib/am/depend.am index ecc6180a6..ecea1fcaa 100644 --- a/lib/am/depend.am +++ b/lib/am/depend.am @@ -18,7 +18,9 @@ am__mv = mv -f $(am__depfiles_remade): @$(MKDIR_P) $(@D) - @echo '# dummy' >$@-t && $(am__mv) $@-t $@ + @: >>$@ +## It's faster to create an empty file, hence :. See thread before and after +## https://lists.gnu.org/archive/html/automake/2022-05/msg00006.html. am--depfiles: $(am__depfiles_remade) .PHONY: am--depfiles |