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linux: add BR2_LINUX_KERNEL_NEEDS_HOST_PAHOLE

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CONFIG_DEBUG_BTF_INFO relies on pahole, so kernel DWARF are converted to BTF.
If CONFIG_DEBUG_BTF_INFO is set and BR2_LINUX_KERNEL_NEEDS_HOST_PAHOLE not,
an error message is shown and .config is not written.

Signed-off-by: Francis Laniel <flaniel@linux.microsoft.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
This commit is contained in:
Francis Laniel
2021-12-22 18:49:05 +01:00
committed by Thomas Petazzoni
parent ddba0ef6b1
commit 2da2f359db
2 changed files with 24 additions and 0 deletions
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12
linux/Config.in
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@@ -470,6 +470,18 @@ config BR2_LINUX_KERNEL_NEEDS_HOST_LIBELF
CONFIG_UNWINDER_ORC=y, please install libelf-dev,
libelf-devel or elfutils-libelf-devel".
config BR2_LINUX_KERNEL_NEEDS_HOST_PAHOLE
bool "Needs host pahole"
help
Some Linux kernel configuration options (such as
CONFIG_DEBUG_INFO_BTF) require building a host program
called pahole. Enabling this option will ensure host-pahole
gets built before the Linux kernel.
Enable this option if you get a Linux kernel build failure
such as "BTF: .tmp_vmlinux.btf: pahole (pahole) is not
available".
# Linux extensions
source "linux/Config.ext.in"