use clang

Author: Jason2866

build.sh

@@ -90,6 +90,7 @@ shift $((OPTIND -1))
 CONFIGS=$@
 
 export IDF_CCACHE_ENABLE=$CCACHE_ENABLE
+export IDF_TOOLCHAIN=clang
 
 # Output the TARGET array
 echo "TARGET(s): ${TARGET[@]}"

tools/config.sh

@@ -6,7 +6,7 @@ if [ -z $IDF_PATH ]; then
 fi
 
 if [ -z $IDF_BRANCH ]; then
-    export IDF_BRANCH="release/v5.5"
+    export IDF_BRANCH="release/v5.5_clang"
 fi
 
 # Arduino branch to use