From 0c8bd135f0eb8e5e9cb5072d88aefbc52f764cc8 Mon Sep 17 00:00:00 2001
From: Waldemar Brodkorb <wbx@openadk.org>
Date: Mon, 3 Mar 2025 09:36:36 +0100
Subject: add support for no Linux kernel builds, use it for arcturus-ucbf54x

---
 mk/build.mk                                 | 4 ++++
 package/busybox/config/coreutils/Config.in  | 4 ++--
 package/busybox/config/util-linux/Config.in | 2 +-
 target/bfin/systems/arcturus-ucbf54x        | 3 +--
 target/config/Config.in.kernelfmt           | 3 +++
 5 files changed, 11 insertions(+), 5 deletions(-)

diff --git a/mk/build.mk b/mk/build.mk
index a3bd84233..aae4ffeca 100644
--- a/mk/build.mk
+++ b/mk/build.mk
@@ -179,9 +179,13 @@ ifeq ($(ADK_TARGET_OS_BAREMETAL),y)
 	$(MAKE) -f mk/build.mk package/hostcompile toolchain/final
 endif
 ifeq ($(ADK_TARGET_OS_LINUX),y)
+ifeq ($(ADK_TARGET_NO_KERNEL),y)
+	$(MAKE) -f mk/build.mk package/hostcompile toolchain/final package_clean package/compile root_clean package/install package_index
+else
 	$(MAKE) -f mk/build.mk package/hostcompile toolchain/final target/config-prepare target/compile package_clean package/compile root_clean package/install target/install package_index
 endif
 endif
+endif
 
 package_index:
 ifeq ($(ADK_TARGET_PACKAGE_IPKG),y)
diff --git a/package/busybox/config/coreutils/Config.in b/package/busybox/config/coreutils/Config.in
index 00d646599..ff7ab88ed 100644
--- a/package/busybox/config/coreutils/Config.in
+++ b/package/busybox/config/coreutils/Config.in
@@ -719,12 +719,12 @@ config BUSYBOX_SUM
 	checksum and count the blocks in a file
 config BUSYBOX_SYNC
 	bool "sync (3.8 kb)"
-	default y
+	default n
 	help
 	sync is used to flush filesystem buffers.
 config BUSYBOX_FEATURE_SYNC_FANCY
 	bool "Enable -d and -f flags (requires syncfs(2) in libc)"
-	default y
+	default n
 	depends on BUSYBOX_SYNC
 	help
 	sync -d FILE... executes fdatasync() on each FILE.
diff --git a/package/busybox/config/util-linux/Config.in b/package/busybox/config/util-linux/Config.in
index 77b2b83f1..5bc9673d3 100644
--- a/package/busybox/config/util-linux/Config.in
+++ b/package/busybox/config/util-linux/Config.in
@@ -660,7 +660,7 @@ config BUSYBOX_NOLOGIN_DEPENDENCIES
 	disable this option.
 config BUSYBOX_NSENTER
 	bool "nsenter (6.5 kb)"
-	default y
+	default n
 	help
 	Run program with namespaces of other processes.
 config BUSYBOX_PIVOT_ROOT
diff --git a/target/bfin/systems/arcturus-ucbf54x b/target/bfin/systems/arcturus-ucbf54x
index 6f140a8fc..f3ea2775f 100644
--- a/target/bfin/systems/arcturus-ucbf54x
+++ b/target/bfin/systems/arcturus-ucbf54x
@@ -3,8 +3,7 @@ config ADK_TARGET_SYSTEM_ARCTURUS_UCBF54X
 	select ADK_TARGET_CPU_BFIN_BF548
 	select ADK_TARGET_WITH_NETDEVICE
 	select ADK_TARGET_WITH_SERIAL
-	select ADK_TARGET_KERNEL_WITH_COMPRESSION
-	select ADK_TARGET_KERNEL_IMAGE_GZ
+	select ADK_TARGET_NO_KERNEL
 	select ADK_TARGET_PACKAGE_TXZ
 	help
 	  Arcturus uCBF54x.
diff --git a/target/config/Config.in.kernelfmt b/target/config/Config.in.kernelfmt
index 1a0b3f7af..2704b08ae 100644
--- a/target/config/Config.in.kernelfmt
+++ b/target/config/Config.in.kernelfmt
@@ -77,6 +77,9 @@ config ADK_TARGET_KERNEL
 	default "bzImage" if ADK_TARGET_SYSTEM_GENERIC_X86_64 || ADK_TARGET_SYSTEM_GENERIC_X86
 	default "vmlinux"
 
+config ADK_TARGET_NO_KERNEL
+	bool
+
 config ADK_TARGET_KERNEL_WITH_COMPRESSION
 	bool
 
-- 
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