================
@@ -44,6 +44,19 @@ set(LLVM_RELEASE_ENABLE_LTO THIN CACHE STRING "")
set(LLVM_RELEASE_ENABLE_PGO ON CACHE BOOL "")
set(LLVM_RELEASE_ENABLE_RUNTIMES ${DEFAULT_RUNTIMES} CACHE STRING "")
set(LLVM_RELEASE_ENABLE_PROJECTS ${DEFAULT_PROJECTS} CACHE STRING "")
+
+# This option enables linking stage2 clang statically with the runtimes
+# (libc++ and compiler-rt) from stage1. In theory this will give the
+# binaries better performance and make them more portable. However,
+# this configuration is not well tested and causes build failures with
+# the flang-rt tests cases, since the -stclib=libc++ flag does not
+# get propagated to the runtimes build. There is also a separate
+# issue on Darwin where clang will use the local libc++ headers, but
+# link with system libc++ which can cause some incompatibilities.
+# See https://github.com/llvm/llvm-project/issues/77653
+# Because of these problems, this option will default to OFF.
+set(LLVM_RELEASE_LINK_LOCAL_RUNTIMES OFF CACHE BOOL "")
----------------
c-rhodes wrote:
nit:
```suggestion
set(LLVM_RELEASE_ENABLE_LINK_LOCAL_RUNTIMES OFF CACHE BOOL "")
```
https://github.com/llvm/llvm-project/pull/164017
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