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Use Linux kernel defconfig format (issue #416)

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This reduces the amount of noise in the Linux kernel config files
by only storing the differences from the stock configuration.
It adds a new makefile target 'linux.saveconfig' to convert the
build tree's .config file into config/linux-linuxboot.config.
This commit is contained in:
Trammell Hudson 2018-08-09 12:45:53 -04:00
parent c7c4b9919c
commit f4e25dd216
Failed to extract signature
2 changed files with 14 additions and 2466 deletions
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2461
config/linux-linuxboot.config
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19
modules/linux
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@ -25,11 +25,12 @@ linux_hash := $(linux-$(linux_version)_hash)
$(build)/$(linux_dir)/.configured: $(linux_kconfig)
linux_configure := \
$(MAKE) -C .. \
mkdir -p "$(build)/$(linux_dir)" \
&& cp "$(pwd)/$(linux_kconfig)" "$(build)/$(linux_dir)/.config" \
&& $(MAKE) -C .. \
CROSS_COMPILE="$(CROSS)" \
O="$(build)/$(linux_dir)" \
KCONFIG_CONFIG="$(pwd)/$(linux_kconfig)" \
oldconfig \
olddefconfig \
linux_output += arch/x86/boot/bzImage
@ -88,7 +89,6 @@ EXTRA_FLAGS := -fdebug-prefix-map=$(pwd)=heads -gno-record-gcc-switches
linux_target := \
O="$(build)/$(linux_dir)" \
KCONFIG_CONFIG="$(pwd)/$(linux_kconfig)" \
CROSS_COMPILE="$(CROSS)" \
AFLAGS_KERNEL="$(EXTRA_FLAGS)" \
CFLAGS_KERNEL="$(EXTRA_FLAGS)" \
@ -148,9 +148,18 @@ $(build)/$(BOARD)/bzImage: $(build)/$(linux_dir)/.build
# menuconfig target allows us to easily reconfigure this Linux kernel
# Afterwars make linux.saveconfig to generate a minimal config from it
linux.menuconfig:
$(MAKE) \
-C "$(build)/$(linux_base_dir)" \
O="$(build)/$(linux_dir)" \
KCONFIG_CONFIG="$(pwd)/$(linux_kconfig)" \
menuconfig \
# The config file in the repo is stored as a "defconfig" format
# which only includes the options that have changed from the defaults.
linux.saveconfig:
$(MAKE) \
-C "$(build)/$(linux_base_dir)" \
O="$(build)/$(linux_dir)" \
savedefconfig
mv "$(build)/$(linux_dir)/defconfig" "$(pwd)/$(linux_kconfig)"