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-rw-r--r--docs/CommandGuide/llvm-build.pod5
1 files changed, 4 insertions, 1 deletions
diff --git a/docs/CommandGuide/llvm-build.pod b/docs/CommandGuide/llvm-build.pod
index 78648ba..14e08cb 100644
--- a/docs/CommandGuide/llvm-build.pod
+++ b/docs/CommandGuide/llvm-build.pod
@@ -46,7 +46,10 @@ component combinations.
=item B<--write-llvmbuild>
Write out new I<LLVMBuild.txt> files based on the loaded components. This is
-useful for auto-upgrading the schema of the files.
+useful for auto-upgrading the schema of the files. B<llvm-build> will try to a
+limited extent to preserve the comments which were written in the original
+source file, although at this time it only preserves block comments that preceed
+the section names in the I<LLVMBuild> files.
=item B<--write-cmake-fragment>