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-rw-r--r--llvm/docs/CMake.rst5
1 files changed, 5 insertions, 0 deletions
diff --git a/llvm/docs/CMake.rst b/llvm/docs/CMake.rst
index a5a574e5707..9725a0673d1 100644
--- a/llvm/docs/CMake.rst
+++ b/llvm/docs/CMake.rst
@@ -573,6 +573,11 @@ LLVM-specific variables
options, which are passed to the CCACHE_MAXSIZE and CCACHE_DIR environment
variables, respectively.
+**LLVM_FORCE_USE_OLD_TOOLCHAIN**:BOOL
+ If enabled, the compiler and standard library versions won't be checked. LLVM
+ may not compile at all, or might fail at runtime due to known bugs in these
+ toolchains.
+
CMake Caches
============
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