build: Change default build toolchain to GNU

.vscode/tasks.json

@@ -15,7 +15,7 @@
                 "${input:FRICertificatPath}",
                 "${input:FRIPrivateKeyPath}",
                 "${input:FRIBuildDirectory}",
-                "-TGNU",
+                "${input:FRIBuildToolchain}",
                 "${input:FRICleanBeforeBuild}"
             ],
             "options": {
@@ -107,6 +107,16 @@
             "description": "Where would you like the build directory to be?",
             "default": "-pbuild"
         },
+        {
+            "type": "pickString",
+            "id": "FRIBuildToolchain",
+            "description": "Which toolchain would you like to build with?",
+            "options": [
+                "-TGNU",
+                "-TARMCLANG"
+            ],
+            "default": "-TGNU"
+        },
         {
             "type": "pickString",
             "id": "FRITarget",

README.md

@@ -43,8 +43,8 @@ of FVP is supported by the FRI.
 
 > Note:
   The build script `./tools/scripts/build.sh` assumes
-  `Arm Compiler for Embedded (armclang)` by default, append the extra option
-  `--toolchain GNU` to build using Arm GNU Toolchain.
+  `Arm GNU Toolchain (arm-none-eabi-gcc)` by default, append the extra option
+  `--toolchain ARMCLANG` to build using Arm Compiler for Embedded Toolchain.
 
 ## Project organisation
 

docs/development_environment/vscode_dev_env_build_and_debug.md

@@ -100,6 +100,16 @@ to setup the needed python environment for VSI to work:
 
 These options allow you to build reference applications.
 
+> The Arm GNU Toolchain is provided with the container and is the default build
+toolchain. If you wish to use the Arm Compiler for Embedded instead, you can
+download it from its [official page](https://developer.arm.com/Tools%20and%20Software/Arm%20Compiler%20for%20Embedded).
+Login is required for the download, and you will need a license in order to
+run the toolchain once installed.
+>
+> This project has been tested with version *6.21* of the toolchain, which
+is available as `r6p21-00rel0` from the *Revision* drop-down menu on the
+download page after logging in.
+
 * **Using generic vscode task:**
 ```
 Command Palette (F1)
@@ -110,12 +120,14 @@ Command Palette (F1)
 => (Path to device certificate)
 => (Path to device private key)
 => (build directory path)
+=> (build toolchain)
 => (clean build)
 ```
 
 * **calling build script directly:**
 ```
-./tools/scripts/build.sh <reference application name> --certificate_path <certificate pem's path>
+./tools/scripts/build.sh <reference application name> --toolchain <GNU/ARMCLANG>
+--certificate_path <certificate pem's path>
 --private_key_path <private key pem's path> --target <target name>
 --inference <inference engine> --audio <audio input>
 ```

release_changes/202408200942.change.md

@@ -0,0 +1 @@
+build: Change default build toolchain to GNU

tools/scripts/build.sh

@@ -18,7 +18,7 @@ ML_INFERENCE_ENGINE="ETHOS"
 ETHOS_U_NPU_ID=""
 ETHOS_U_NPU_NUM_MACS=""
 AUDIO_SOURCE="ROM"
-TOOLCHAIN="ARMCLANG"
+TOOLCHAIN="GNU"
 TOOLCHAIN_FILE=""
 BUILD=1
 CERTIFICATE_PATH=""