[Buildroot] [PATCH] Add kernel compression selection.
Maxime Hadjinlian
maxime.hadjinlian at gmail.com
Sun Jul 12 11:34:13 UTC 2015
From: Johan Sagaert <sagaert.johan at proximus.be>
This selection will ensure that the correct host tools
will be build used for the kernel compression method used.
[Maxime: Select the compression opts in the kernel config too ]
Signed-off-by: Sagaert Johan <sagaert.johan at proximus.be>
Signed-off-by: Maxime Hadjinlian <maxime.hadjinlian at gmail.com>
---
V3->V4
Add selection menu in the kernel menu section.
This ensures only things needed are build.
V2->V3
Unconditionally build lz4.
The building overhead is negligible.
V1->V2
Only add the host-lz4 dependency when ARM is selected.
Don't touch host-lz4 package.
---
linux/Config.in | 28 ++++++++++++++++++++++++++++
linux/linux.mk | 27 ++++++++++++++++++++++++++-
2 files changed, 54 insertions(+), 1 deletion(-)
diff --git a/linux/Config.in b/linux/Config.in
index 8c86a1a..73ae0b9 100644
--- a/linux/Config.in
+++ b/linux/Config.in
@@ -254,6 +254,34 @@ config BR2_LINUX_KERNEL_IMAGE_TARGET_CUSTOM
endchoice
+#
+# Kernel compression format
+#
+
+choice
+ prompt "Kernel compression format"
+ help
+ This selection will just ensure that the correct host tools are build.
+ The actual compression for the kernel should be selected in the
+ kernel configuration menu.
+
+config BR2_LINUX_KERNEL_GZIP
+ bool "gzip compression"
+
+config BR2_LINUX_KERNEL_LZ4
+ bool "lz4 compression"
+
+config BR2_LINUX_KERNEL_LZMA
+ bool "lzma compression"
+
+config BR2_LINUX_KERNEL_LZO
+ bool "lzo compression"
+
+config BR2_LINUX_KERNEL_XZ
+ bool "xz compression"
+
+endchoice
+
config BR2_LINUX_KERNEL_IMAGE_TARGET_NAME
string "Kernel image target name"
depends on BR2_LINUX_KERNEL_IMAGE_TARGET_CUSTOM
diff --git a/linux/linux.mk b/linux/linux.mk
index eca1450..c710355 100644
--- a/linux/linux.mk
+++ b/linux/linux.mk
@@ -56,7 +56,27 @@ LINUX_PATCHES = $(call qstrip,$(BR2_LINUX_KERNEL_PATCH))
LINUX_PATCH = $(filter ftp://% http://% https://%,$(LINUX_PATCHES))
LINUX_INSTALL_IMAGES = YES
-LINUX_DEPENDENCIES += host-kmod host-lzop
+LINUX_DEPENDENCIES += host-kmod
+
+# host tools needed for kernel compression
+ifeq ($(BR2_LINUX_KERNEL_LZ4),y)
+LINUX_DEPENDENCIES += host-lz4
+LINUX_COMPRESSION_OPTS = CONFIG_KERNEL_LZ4
+else ifeq ($(BR2_LINUX_KERNEL_LZMA),y)
+LINUX_DEPENDENCIES += host-lzma
+LINUX_COMPRESSION_OPTS = CONFIG_KERNEL_LZMA
+else ifeq ($(BR2_LINUX_KERNEL_LZO),y)
+LINUX_DEPENDENCIES += host-lzop
+LINUX_COMPRESSION_OPTS = CONFIG_KERNEL_LZO
+else ifeq ($(BR2_LINUX_KERNEL_XZ),y)
+LINUX_DEPENDENCIES += host-xz
+LINUX_COMPRESSION_OPTS = CONFIG_KERNEL_XZ
+endif
+LINUX_COMPRESSION_OPT_$(BR2_LINUX_KERNEL_GZIP) = CONFIG_KERNEL_GZIP
+LINUX_COMPRESSION_OPT_$(BR2_LINUX_KERNEL_LZ4) = CONFIG_KERNEL_LZ4
+LINUX_COMPRESSION_OPT_$(BR2_LINUX_KERNEL_LZMA) = CONFIG_KERNEL_LZMA
+LINUX_COMPRESSION_OPT_$(BR2_LINUX_KERNEL_LZO) = CONFIG_KERNEL_LZO
+LINUX_COMPRESSION_OPT_$(BR2_LINUX_KERNEL_XZ) = CONFIG_KERNEL_XZ
ifeq ($(BR2_LINUX_KERNEL_UBOOT_IMAGE),y)
LINUX_DEPENDENCIES += host-uboot-tools
@@ -187,6 +207,11 @@ LINUX_KCONFIG_EDITORS = menuconfig xconfig gconfig nconfig
LINUX_KCONFIG_OPTS = $(LINUX_MAKE_FLAGS)
define LINUX_KCONFIG_FIXUP_CMDS
+ $(call KCONFIG_ENABLE_OPT,$(LINUX_COMPRESSION_OPT_y),$(@D)/.config)
+ $(foreach opt, $(LINUX_COMPRESSION_OPT_),
+ $(call KCONFIG_DISABLE_OPT,$(opt),$(@D)/.config)
+ )
+
$(if $(BR2_arm)$(BR2_armeb),
$(call KCONFIG_ENABLE_OPT,CONFIG_AEABI,$(@D)/.config))
$(if $(BR2_TARGET_ROOTFS_CPIO),
--
2.1.4
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