Import prebuilt clang toolchain for linux.
diff --git a/linux-x64/clang/lib64/cmake/llvm/LLVMInstallSymlink.cmake b/linux-x64/clang/lib64/cmake/llvm/LLVMInstallSymlink.cmake
new file mode 100644
index 0000000..1a04de9
--- /dev/null
+++ b/linux-x64/clang/lib64/cmake/llvm/LLVMInstallSymlink.cmake
@@ -0,0 +1,21 @@
+# We need to execute this script at installation time because the
+# DESTDIR environment variable may be unset at configuration time.
+# See PR8397.
+
+function(install_symlink name target outdir)
+ if(CMAKE_HOST_UNIX)
+ set(LINK_OR_COPY create_symlink)
+ set(DESTDIR $ENV{DESTDIR})
+ else()
+ set(LINK_OR_COPY copy)
+ endif()
+
+ set(bindir "${DESTDIR}${CMAKE_INSTALL_PREFIX}/${outdir}/")
+
+ message("Creating ${name}")
+
+ execute_process(
+ COMMAND "${CMAKE_COMMAND}" -E ${LINK_OR_COPY} "${target}" "${name}"
+ WORKING_DIRECTORY "${bindir}")
+
+endfunction()