Add a script for generating merged config

Author: ziyao233

scripts/generate-config.sh

@@ -0,0 +1,28 @@
+#!/usr/bin/env bash
+
+die() {
+	echo "$1" 1>&2
+	exit
+}
+
+carch="$1"
+karch="$2"
+ksrc="$3"
+config_path="$(dirname "$0")/../"
+
+[ "$carch" ] || die "No architecture specified"
+[ "$karch" ] || die "Kernel-flavour architecture not specified"
+[ "$ksrc" ] || die "Kernel soruce directory not specified"
+[ -d "$config_path/$carch" ] || die "Unknown architecture $carch"
+
+mergedconfig="$(mktemp)"
+
+for _conf in "$config_path"/*.config "$config_path/$carch"/*.config; do
+	cat "$_conf" >> "$mergedconfig"
+done
+
+cd "$ksrc"
+
+make LLVM=1 LLVM_IAS=1 ARCH="$karch" defconfig
+scripts/kconfig/merge_config.sh -m .config "$mergedconfig"
+make LLVM=1 LLVM_IAS=1 ARCH="$karch" olddefconfig