Update upstream source from tag 'upstream/1.52.1+dfsg1'

[rustc.git] / src / doc / rustc / src / codegen-options / index.md

diff --git a/src/doc/rustc/src/codegen-options/index.md b/src/doc/rustc/src/codegen-options/index.md
index 1883346430be024e7adc725d1496857fde0068b7..4eb2aa9917560a39dfc891c711feec5ef2ca8ebb 100644 (file)
--- a/src/doc/rustc/src/codegen-options/index.md
+++ b/src/doc/rustc/src/codegen-options/index.md
@@ -161,6 +161,9 @@ to save information after compiling a crate to be reused when recompiling the
 crate, improving re-compile times. This takes a path to a directory where
 incremental files will be stored.
 
+Note that this option currently does not take effect unless
+`RUSTC_FORCE_INCREMENTAL=1` in the environment.
+
 ## inline-threshold
 
 This option lets you set the default threshold for inlining a function. It