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author | Kelvin M. Klann <kmk3.code@protonmail.com> | 2021-02-12 05:25:23 -0300 |
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committer | Kelvin M. Klann <kmk3.code@protonmail.com> | 2021-03-01 16:07:43 -0300 |
commit | 2465f9248e1e2737479fad5065d8310a860ce415 (patch) | |
tree | 09ef4bd8d73c98b7cb8a23f6cc2b8ed6d43576a9 /etc/profile-a-l/gtar.profile | |
parent | makefiles: fix misc blank line consistency (diff) | |
download | firejail-2465f9248e1e2737479fad5065d8310a860ce415.tar.gz firejail-2465f9248e1e2737479fad5065d8310a860ce415.tar.zst firejail-2465f9248e1e2737479fad5065d8310a860ce415.zip |
makefiles: make all, clean and distclean PHONY
Avoid a stat() call for each affected target and also potentially speed
up parallel builds.
From the GNU make manual[1]:
> Phony targets are also useful in conjunction with recursive
> invocations of make (see Recursive Use of make). In this situation
> the makefile will often contain a variable which lists a number of
> sub-directories to be built.
[...]
> The implicit rule search (see Implicit Rules) is skipped for .PHONY
> targets. This is why declaring a target as .PHONY is good for
> performance, even if you are not worried about the actual file
> existing.
Commands used to search, replace and cleanup:
$ find -type f -name '*Makefile.in' -exec sed -i.bak \
-e 's/^all:/.PHONY: all\nall:/' \
-e 's/^clean:/.PHONY: clean\nclean:/' \
-e 's/^distclean:/.PHONY: distclean\ndistclean:/' '{}' +
$ find -type f -name '*Makefile.in.bak' -exec rm '{}' +
[1]: https://www.gnu.org/software/make/manual/html_node/Phony-Targets.html
Diffstat (limited to 'etc/profile-a-l/gtar.profile')
0 files changed, 0 insertions, 0 deletions