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-rw-r--r--docs/markdown/Builtin-options.md4
1 files changed, 3 insertions, 1 deletions
diff --git a/docs/markdown/Builtin-options.md b/docs/markdown/Builtin-options.md
index 613b8b8..db3c3e8 100644
--- a/docs/markdown/Builtin-options.md
+++ b/docs/markdown/Builtin-options.md
@@ -23,13 +23,15 @@ For legacy reasons `--warnlevel` is the cli argument for the
They can also be edited after setup using `meson configure
-Doption=value`.
-Installation options are all relative to the prefix, except:
+Installation options are usually relative to the prefix but it should
+not be relied on, since they can be absolute paths in the following cases:
* When the prefix is `/usr`: `sysconfdir` defaults to `/etc`,
`localstatedir` defaults to `/var`, and `sharedstatedir` defaults to
`/var/lib`
* When the prefix is `/usr/local`: `localstatedir` defaults
to `/var/local`, and `sharedstatedir` defaults to `/var/local/lib`
+* When an absolute path outside of prefix is provided by the user/distributor.
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