[Buildroot] [PATCH] linux: use host pkg-config when host libelf is set
Yann E. MORIN
yann.morin.1998 at free.fr
Sat Apr 6 20:31:17 UTC 2019
Stuart, All,
On 2019-04-05 11:47 -0700, Stuart Summers spake thusly:
> A patch was added to the Linux kernel in 5.1.0-rc3 which
> adds a requirement that the host build environment include
> pkg-config. Add the correct host-pkgconf dependency and
> environment variables to ensure Linux picks up the correct
> libraries.
>
> Suggested-by: Thomas Petazzoni <thomas.petazzoni at bootlin.com>
> Signed-off-by: Stuart Summers <stuart.summers at intel.com>
> ---
> linux/linux.mk | 14 ++++++++++----
> 1 file changed, 10 insertions(+), 4 deletions(-)
>
> diff --git a/linux/linux.mk b/linux/linux.mk
> index 6bf2b88038..05bb5b9525 100644
> --- a/linux/linux.mk
> +++ b/linux/linux.mk
> @@ -96,10 +96,6 @@ ifeq ($(BR2_LINUX_KERNEL_NEEDS_HOST_OPENSSL),y)
> LINUX_DEPENDENCIES += host-openssl
> endif
>
> -ifeq ($(BR2_LINUX_KERNEL_NEEDS_HOST_LIBELF),y)
> -LINUX_DEPENDENCIES += host-elfutils
> -endif
Why did you move that block around?
> # If host-uboot-tools is selected by the user, assume it is needed to
> # create a custom image
> ifeq ($(BR2_PACKAGE_HOST_UBOOT_TOOLS),y)
> @@ -125,6 +121,16 @@ LINUX_MAKE_ENV = \
> $(TARGET_MAKE_ENV) \
> BR_BINARIES_DIR=$(BINARIES_DIR)
>
> +ifeq ($(BR2_LINUX_KERNEL_NEEDS_HOST_LIBELF),y)
> +LINUX_DEPENDENCIES += host-elfutils host-pkgconf
> +LINUX_MAKE_ENV += \
> + PKG_CONFIG="$(PKG_CONFIG_HOST_BINARY)" \
> + PKG_CONFIG_SYSROOT_DIR="/" \
> + PKG_CONFIG_ALLOW_SYSTEM_CFLAGS=1 \
> + PKG_CONFIG_ALLOW_SYSTEM_LIBS=1 \
> + PKG_CONFIG_LIBDIR="$(HOST_DIR)/lib/pkgconfig:$(HOST_DIR)/share/pkgconfig"
linux is a kconfig-package, so we should be able to run (for example):
make linux-menuconfig
However, this should use the real pkg-config from the host, not ours, so
we explictly blacklist a set of PKG_CONFIG_* variables when calling the
kconfig configurators:
https://git.buildroot.org/buildroot/tree/package/pkg-kconfig.mk#n174
If needed, please expand that blacklist with the two additional
PKG_CONFIG_ALLOW_SYSTEM_{CFLAGS,LIBS} this patch introduces.
If that is not needed, please expand the commit log to explain it.
In the meantime, I've marked this patch as changes-requested in
patchwork.
Thank! :-)
Regards,
Yann E. MORIN.
> +endif
> +
> ifeq ($(BR2_REPRODUCIBLE),y)
> LINUX_MAKE_ENV += \
> KBUILD_BUILD_VERSION=1 \
> --
> 2.20.1
>
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