Index: cmake/caches/Fuchsia.cmake
===================================================================
--- cmake/caches/Fuchsia.cmake
+++ cmake/caches/Fuchsia.cmake
@@ -29,6 +29,18 @@
   set(COMPILER_RT_ENABLE_IOS OFF CACHE BOOL "")
   set(COMPILER_RT_ENABLE_TVOS OFF CACHE BOOL "")
   set(COMPILER_RT_ENABLE_WATCHOS OFF CACHE BOOL "")
+else()
+  set(LIBUNWIND_ENABLE_SHARED OFF CACHE BOOL "")
+  set(LIBUNWIND_USE_COMPILER_RT ON CACHE BOOL "")
+  set(LIBUNWIND_INSTALL_LIBRARY OFF CACHE BOOL "")
+  set(LIBCXXABI_USE_COMPILER_RT ON CACHE BOOL "")
+  set(LIBCXXABI_ENABLE_SHARED OFF CACHE BOOL "")
+  set(LIBCXXABI_USE_LLVM_UNWINDER ON CACHE BOOL "")
+  set(LIBCXXABI_ENABLE_STATIC_UNWINDER ON CACHE BOOL "")
+  set(LIBCXXABI_INSTALL_LIBRARY OFF CACHE BOOL "")
+  set(LIBCXX_USE_COMPILER_RT ON CACHE BOOL "")
+  set(LIBCXX_ENABLE_SHARED OFF CACHE BOOL "")
+  set(LIBCXX_ENABLE_STATIC_ABI_LIBRARY ON CACHE BOOL "")
 endif()
 
 set(CLANG_BOOTSTRAP_TARGETS