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| author | Thomas Petazzoni <thomas.petazzoni@free-electrons.com> | 2016-06-14 12:19:58 +0200 |
|---|---|---|
| committer | Thomas Petazzoni <thomas.petazzoni@free-electrons.com> | 2016-06-18 15:05:15 +0200 |
| commit | 53ced1f6d3da6b037d45a70ed0d8a25f5ab15142 (patch) | |
| tree | 86b3f4bb56c4cce1a69ddb8956a73ec706246719 /linux | |
| parent | bcc8d367140d00f76aba6ef4387a12469fa0c024 (diff) | |
linux: allow the selection of the architecture's default configuration
To configure the Linux kernel, we currently provide two options:
1. Passing a defconfig name (for example "multi_v7"), to which we append
"_defconfig" to run "make multi_v7_defconfig".
2. Passing a path to a custom configuration file.
Unfortunately, those two possibilities do not allow to configure the
kernel when you want to use the default configuration built into the
kernel for a given architecture. For example, on ARM64, there is a
single defconfig simply called "defconfig", which you can load by
running "make defconfig".
Using the mechanism (1) above doesn't work because we append
"_defconfig" automatically.
One solution would be to change (1) and require the user to enter the
full defconfig named (i.e "multi_v7_defconfig" instead of "multi_v7"),
but we would break all existing Buildroot configurations.
So instead, we add a third option, which simply tells Buildroot to use
the default configuration for the selected architecture. In this case,
Buildroot will configure the kernel by running "make defconfig".
Cc: Naresh Kamboju <naresh.kamboju@linaro.org>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Acked-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Diffstat (limited to 'linux')
| -rw-r--r-- | linux/Config.in | 8 | ||||
| -rw-r--r-- | linux/linux.mk | 2 |
2 files changed, 10 insertions, 0 deletions
diff --git a/linux/Config.in b/linux/Config.in index ce55271c9..be6d0ccbc 100644 --- a/linux/Config.in +++ b/linux/Config.in @@ -142,6 +142,14 @@ choice config BR2_LINUX_KERNEL_USE_DEFCONFIG bool "Using an in-tree defconfig file" +config BR2_LINUX_KERNEL_USE_ARCH_DEFAULT_CONFIG + bool "Use the architecture default configuration" + help + This option will use the default configuration for the + selected architecture. I.e, it is equivalent to running + "make ARCH=<foo> defconfig". This is useful on architectures + that have a single defconfig file, such as ARM64. + config BR2_LINUX_KERNEL_USE_CUSTOM_CONFIG bool "Using a custom (def)config file" diff --git a/linux/linux.mk b/linux/linux.mk index a751da93b..fb844ef7a 100644 --- a/linux/linux.mk +++ b/linux/linux.mk @@ -206,6 +206,8 @@ LINUX_POST_PATCH_HOOKS += LINUX_TRY_PATCH_TIMECONST ifeq ($(BR2_LINUX_KERNEL_USE_DEFCONFIG),y) LINUX_KCONFIG_DEFCONFIG = $(call qstrip,$(BR2_LINUX_KERNEL_DEFCONFIG))_defconfig +else ifeq ($(BR2_LINUX_KERNEL_USE_ARCH_DEFAULT_CONFIG),y) +LINUX_KCONFIG_DEFCONFIG = defconfig else ifeq ($(BR2_LINUX_KERNEL_USE_CUSTOM_CONFIG),y) LINUX_KCONFIG_FILE = $(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE)) endif |