Add user-setup script overrides for Linux

tools/lib/setup-common.sh

@@ -4,6 +4,11 @@ script_dir="$(dirname "$(readlink -f "$0")")"
 # Import common paths
 source "${script_dir}/common-paths.sh"
 
+# Load custom build settings
+if [ -f "${script_dir}/user-setup.sh" ]; then
+    source "${script_dir}/user-setup.sh"
+fi
+
 # Activate Python Virtual Environment
 if [ -n "${venv_path:-}" ]; then
     python -m venv "${venv_path}"

tools/lib/user-setup.example.sh

@@ -0,0 +1,10 @@
+#!/bin/bash
+
+# Example user setup script. Copy as user-setup.sh and modify as required.
+
+# gcc-13 is not the default gcc version
+export CC=/usr/bin/gcc-13
+export CXX=/usr/bin/c++-13
+
+# Override conan profile to be gcc-13
+export conan_profile=scwx-linux_gcc-13