--- /dev/null
+hack to replace arm version in triplet returned by config.guess
+with the one we want for raspbian.
+
+--- /dev/null
++++ llvm-toolchain-9-9/cmake/config.guess.hack
+@@ -0,0 +1,2 @@
++#!/bin/bash -e
++$(dirname "$0")/config.guess | sed -r s/arm[a-zA-Z0-9]*/armv6/
+--- llvm-toolchain-9-9.orig/cmake/modules/GetHostTriple.cmake
++++ llvm-toolchain-9-9/cmake/modules/GetHostTriple.cmake
+@@ -18,7 +18,7 @@ function( get_host_triple var )
+ if(CMAKE_HOST_SYSTEM_NAME STREQUAL Windows AND NOT MSYS)
+ message(WARNING "unable to determine host target triple")
+ else()
+- set(config_guess ${LLVM_MAIN_SRC_DIR}/cmake/config.guess)
++ set(config_guess ${LLVM_MAIN_SRC_DIR}/cmake/config.guess.hack)
+ execute_process(COMMAND sh ${config_guess}
+ RESULT_VARIABLE TT_RV
+ OUTPUT_VARIABLE TT_OUT
+--- llvm-toolchain-9-9.orig/compiler-rt/cmake/base-config-ix.cmake
++++ llvm-toolchain-9-9/compiler-rt/cmake/base-config-ix.cmake
+@@ -203,8 +203,8 @@ macro(test_targets)
+ if(WIN32)
+ test_target_arch(arm "" "" "")
+ else()
+- test_target_arch(arm "" "-march=armv7-a" "-mfloat-abi=soft")
+- test_target_arch(armhf "" "-march=armv7-a" "-mfloat-abi=hard")
++ test_target_arch(arm "" "" "-mfloat-abi=soft")
++ test_target_arch(armhf "" "" "-mfloat-abi=hard")
+ test_target_arch(armv6m "" "-march=armv6m" "-mfloat-abi=soft")
+ endif()
+ elseif("${COMPILER_RT_DEFAULT_TARGET_ARCH}" MATCHES "aarch32")