[ThinLTO][Documentation] Mention possible values for concurrency flags

Differential Revision: https://reviews.llvm.org/D89309
llvm · Oct 13, 2020 · 1dbf05f · 1dbf05f
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commit 1dbf05f
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diff --git a/clang/docs/ThinLTO.rst b/clang/docs/ThinLTO.rst
@@ -123,6 +123,11 @@ be reduced to ``N`` via:
 - lld-link:
   ``/opt:lldltojobs=N``
 
+Other possible values for ``N`` are:
+- 0: Use one thread per physical core (default)
+- 1: Use a single thread only (disable multi-threading)
+- all: Use one thread per logical core (uses all hyper-threads)
+
 Incremental
 -----------
 .. _incremental: