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authorJan Niklas Hasse <jhasse@bixense.com>2019-07-09 12:43:16 (GMT)
committerGitHub <noreply@github.com>2019-07-09 12:43:16 (GMT)
commite0bc2e5fd9036a31d507881e1383adde3672aaef (patch)
tree57eeeaa192ba706deb4f8bc6f380f8a703c9ee04 /doc/manual.asciidoc
parent4d3b315329a46ad18c845948c6a22dc54edc6b0b (diff)
parent5a3a06afd218c1f913a843c63dc58ad6e40c6535 (diff)
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Merge pull request #1016 from moroten/docs-empty-rule-uptodate
Describe how to make a phony rule always up to date
Diffstat (limited to 'doc/manual.asciidoc')
-rw-r--r--doc/manual.asciidoc8
1 files changed, 8 insertions, 0 deletions
diff --git a/doc/manual.asciidoc b/doc/manual.asciidoc
index 7f3ab8a..e49d26d 100644
--- a/doc/manual.asciidoc
+++ b/doc/manual.asciidoc
@@ -452,6 +452,14 @@ without any dependencies, the target will be considered out of date if
it does not exist. Without a phony build statement, Ninja will report
an error if the file does not exist and is required by the build.
+To create a rule that never rebuilds, use a build rule without any input:
+----------------
+rule touch
+ command = touch $out
+build file_that_always_exists.dummy: touch
+build dummy_target_to_follow_a_pattern: phony file_that_always_exists.dummy
+----------------
+
Default target statements
~~~~~~~~~~~~~~~~~~~~~~~~~