prepare: allow choosing oldconfig as the .config updating tool (#315)

* prepare: allow choosing oldconfig as the .config updating tool

Signed-off-by: Theo Anderson <telans@posteo.de>

* prepare: make oldconfig interactable

Signed-off-by: Theo Anderson <telans@posteo.de>

customization.cfg

@@ -82,6 +82,9 @@ _dracut_options="--lz4"
 #       One can use "kernelconfig.new" here to always use the latest edited .config file. modprobed-db needs to be used only once for its changes to be picked up.
 _configfile=""
 
+# Determine whether to call "olddefconfig" (default) or "oldconfig" for manual config updating interaction.
+_config_updating="olddefconfig"
+
 # Disable some non-module debugging - See PKGBUILD for the list
 _debugdisable="false"
 

linux-tkg-config/prepare

@@ -1309,7 +1309,7 @@ CONFIG_DEBUG_INFO_BTF_MODULES=y\r
 
   # rewrite configuration
   msg2 "Setting config"
-  make olddefconfig ${llvm_opt} >> "$_where"/prepare.log
+  make ${_config_updating} ${llvm_opt} |& tee -a "$_where"/prepare.log
 
   # menuconfig / nconfig
   if [ -z "$_menunconfig" ] && [ "$_distro" != "Void" ]; then