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package/linux-headers: add support for fetching from custom tarball/git

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Add support for building toolchains against custom headers. Allows
the selection of a manual version, custom tarball or custom git
repository for the kernel headers. This enables toolchains to be
built against custom kernel headers without having to build a full
kernel.

This is particularly useful for new architectures, such as RISC-V
where updated kernel headers may not have made it into the mainline
kernel yet.

Signed-off-by: Mark Corbin <mark.corbin@embecosm.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
This commit is contained in:
Mark Corbin 2018-09-23 21:43:12 +02:00 committed by Thomas Petazzoni
parent 97ffbc9aee
commit 1eca624c03
2 changed files with 45 additions and 7 deletions
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40
package/linux-headers/Config.in.host
View File

@ -70,6 +70,23 @@ config BR2_KERNEL_HEADERS_VERSION
URL at kernel.org. Instead, select "Custom tarball" and
specify the right URL directly.
config BR2_KERNEL_HEADERS_CUSTOM_TARBALL
bool "Custom tarball"
help
This option allows you to specify a URL pointing to a kernel
source tarball. This URL can use any protocol recognized by
Buildroot, like http://, ftp://, file:// or scp://.
When pointing to a local tarball using file://, you may want
to use a make variable like $(TOPDIR) to reference the root of
the Buildroot tree.
config BR2_KERNEL_HEADERS_CUSTOM_GIT
bool "Custom Git repository"
help
This option allows Buildroot to get the Linux kernel source
code from a Git repository.
endchoice
config BR2_DEFAULT_KERNEL_VERSION
@ -79,9 +96,27 @@ config BR2_DEFAULT_KERNEL_VERSION
Specify the version you want to use.
E.G.: 3.6.10
config BR2_KERNEL_HEADERS_CUSTOM_TARBALL_LOCATION
string "URL of custom kernel tarball"
depends on BR2_KERNEL_HEADERS_CUSTOM_TARBALL
if BR2_KERNEL_HEADERS_CUSTOM_GIT
config BR2_KERNEL_HEADERS_CUSTOM_REPO_URL
string "URL of custom repository"
config BR2_KERNEL_HEADERS_CUSTOM_REPO_VERSION
string "Custom repository version"
help
Revision to use in the typical format used by
Git/Mercurial/Subversion E.G. a sha id, a tag, branch, ..
endif
choice
bool "Custom kernel headers series"
depends on BR2_KERNEL_HEADERS_VERSION || BR2_KERNEL_HEADERS_AS_KERNEL
depends on BR2_KERNEL_HEADERS_VERSION || BR2_KERNEL_HEADERS_AS_KERNEL || \
BR2_KERNEL_HEADERS_CUSTOM_TARBALL || BR2_KERNEL_HEADERS_CUSTOM_GIT
help
Specify the kernel headers series you manually selected,
above.
@ -260,3 +295,6 @@ config BR2_DEFAULT_KERNEL_HEADERS
default "4.16.18" if BR2_KERNEL_HEADERS_4_16
default "4.18.9" if BR2_KERNEL_HEADERS_4_18
default BR2_DEFAULT_KERNEL_VERSION if BR2_KERNEL_HEADERS_VERSION
default "custom" if BR2_KERNEL_HEADERS_CUSTOM_TARBALL
default BR2_KERNEL_HEADERS_CUSTOM_REPO_VERSION \
if BR2_KERNEL_HEADERS_CUSTOM_GIT

12
package/linux-headers/linux-headers.mk
View File

@ -18,13 +18,13 @@ LINUX_HEADERS_VERSION = $(call qstrip,$(BR2_LINUX_KERNEL_VERSION))
LINUX_HEADERS_CUSTOM_TARBALL_LOCATION = $(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_TARBALL_LOCATION))
LINUX_HEADERS_REPO_URL = $(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_REPO_URL))
else # ! BR2_KERNEL_HEADERS_AS_KERNEL
LINUX_HEADERS_CUSTOM_TARBALL =
LINUX_HEADERS_CUSTOM_GIT =
LINUX_HEADERS_CUSTOM_TARBALL = $(call qstrip,$(BR2_KERNEL_HEADERS_CUSTOM_TARBALL))
LINUX_HEADERS_CUSTOM_GIT = $(call qstrip,$(BR2_KERNEL_HEADERS_CUSTOM_GIT))
LINUX_HEADERS_CUSTOM_HG =
LINUX_HEADERS_CUSTOM_SVN =
LINUX_HEADERS_VERSION = $(call qstrip,$(BR2_DEFAULT_KERNEL_HEADERS))
LINUX_HEADERS_CUSTOM_TARBALL_LOCATION =
LINUX_HEADERS_REPO_URL =
LINUX_HEADERS_CUSTOM_TARBALL_LOCATION = $(call qstrip,$(BR2_KERNEL_HEADERS_CUSTOM_TARBALL_LOCATION))
LINUX_HEADERS_REPO_URL = $(call qstrip,$(BR2_KERNEL_HEADERS_CUSTOM_REPO_URL))
endif # BR2_KERNEL_HEADERS_AS_KERNEL
# Configure tarball filenames.
@ -90,7 +90,7 @@ LINUX_HEADERS_POST_PATCH_HOOKS += LINUX_HEADERS_APPLY_LOCAL_PATCHES
endif # BR2_KERNEL_HEADERS_AS_KERNEL
# Skip hash checking for custom kernel headers.
ifeq ($(BR2_KERNEL_HEADERS_VERSION),y)
ifeq ($(BR2_KERNEL_HEADERS_VERSION)$(BR2_KERNEL_HEADERS_CUSTOM_TARBALL)$(BR2_KERNEL_HEADERS_CUSTOM_GIT),y)
BR_NO_CHECK_HASH_FOR += $(LINUX_HEADERS_SOURCE)
endif
@ -137,7 +137,7 @@ define LINUX_HEADERS_INSTALL_STAGING_CMDS
headers_install)
endef
ifeq ($(BR2_KERNEL_HEADERS_VERSION)$(BR2_KERNEL_HEADERS_AS_KERNEL),y)
ifeq ($(BR2_KERNEL_HEADERS_VERSION)$(BR2_KERNEL_HEADERS_AS_KERNEL)$(BR2_KERNEL_HEADERS_CUSTOM_TARBALL)$(BR2_KERNEL_HEADERS_CUSTOM_GIT),y)
define LINUX_HEADERS_CHECK_VERSION
$(call check_kernel_headers_version,\
$(STAGING_DIR),\