Arm backend: Fix Corstone-300 linker script patch (#8457)

Fix path of patch code of the corstone-300 linker script
and auto create the ethos_u folder from from cmake

Signed-off-by: Zingo Andersen <[email protected]>

Author: zingo

backends/arm/scripts/utils.sh

@@ -30,12 +30,12 @@ function verify_md5() {
 
 function patch_repo() {
     # Patch git repo found in $repo_dir, starting from patch $base_rev and applying patches found in $patch_dir/$name.
-    
+
     # Arg 1: Directory of repo to patch
     # Arg 2: Rev to start patching at
     # Arg 3: Directory 'setup-dir' containing patches in 'setup-dir/$name'
     # Exits with return code 1 if the number of arguments is incorrect.
-    # Does not do any error handling if the base_rev or patch_dir is not found etc.     
+    # Does not do any error handling if the base_rev or patch_dir is not found etc.
 
     [[ $# -ne 3 ]]  \
         && { echo "[${FUNCNAME[0]}] Invalid number of args, expecting 3, but got $#"; exit 1; }
@@ -45,7 +45,7 @@ function patch_repo() {
     local name="$(basename $repo_dir)"
     local patch_dir="${3}/$name"
 
-    echo -e "[${FUNCNAME[0]}] Patching ${name}..."
+    echo -e "[${FUNCNAME[0]}] Patching ${name} repo_dir:${repo_dir} base_rev:${base_rev} patch_dir:${patch_dir}"
     cd $repo_dir
     git fetch
     git reset --hard ${base_rev}

examples/arm/executor_runner/CMakeLists.txt

@@ -45,6 +45,8 @@ set(PYTHON_EXECUTABLE
 )
 
 # Download ethos_u dependency if needed.
+file(MAKE_DIRECTORY ${ETHOS_SDK_PATH}/../ethos_u)
+
 include(FetchContent)
 set(ethos_u_base_rev "24.08")
 FetchContent_Declare(
@@ -69,7 +71,7 @@ endif()
 
 # Always patch the core_platform repo since this is fast enough.
 set(core_platform_base_rev "b728c774158248ba2cad8e78a515809e1eb9b77f")
-set(patch_dir "examples/arm/ethos-u-setup")
+set(patch_dir "${ET_DIR_PATH}/examples/arm/ethos-u-setup")
 execute_process(COMMAND bash -c "pwd && source backends/arm/scripts/utils.sh && patch_repo ${ETHOS_SDK_PATH}/core_platform ${core_platform_base_rev} ${patch_dir}"
   WORKING_DIRECTORY ${ET_DIR_PATH}
   COMMAND_ECHO STDOUT