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linux: add BR2_LINUX_KERNEL_NEEDS_HOST_LIBELF

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Some Linux kernel configuration options (such as CONFIG_UNWINDER_ORC)
require building a host program that needs libelf.

Users who have libelf installed on their system won't see a problem,
but users who don't have libelf installed will get a build
failure. Therefore, this commit adds an option that allows a user to
indicate that his Linux kernel configuration requires libelf. When
this option is enabled, we add host-elfutils to the dependencies of
the linux package (host-elfutils provides the libelf library).

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
This commit is contained in:
Thomas Petazzoni
2018-03-04 22:31:16 +01:00
committed by Peter Korsgaard
parent 93a7edf4bc
commit f7cd72b3d4
2 changed files with 17 additions and 0 deletions
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13
linux/Config.in
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@@ -420,6 +420,19 @@ config BR2_LINUX_KERNEL_NEEDS_HOST_OPENSSL
such as "scripts/extract-cert.c:21:25: fatal error:
openssl/bio.h: No such file or directory".
config BR2_LINUX_KERNEL_NEEDS_HOST_LIBELF
bool "Needs host libelf"
help
Some Linux kernel configuration options (such as
CONFIG_UNWINDER_ORC) require building a host program that
needs libelf. Enabling this option will ensure host-elfutils
(which provides libelf) gets built before the Linux kernel.
Enable this option if you get a Linux kernel build failure
such as "Cannot generate ORC metadata for
CONFIG_UNWINDER_ORC=y, please install libelf-dev,
libelf-devel or elfutils-libelf-devel".
# Linux extensions
source "linux/Config.ext.in"