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include: kernel-build: pass pkg-config overrides to kernel build

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Pass suitable pkg-config overrides to the kernel build process in
order to let our pkg-config wrapper discover libraries provided
by tools/.

This mainly affects the use of libelf which is required for the
CONFIG_STACK_VALIDATION features. So far, the build system either
silently used host system libraries or kbuild simply disabled the
feature due to the lack of a suitable libelf.

Signed-off-by: Jo-Philipp Wich <jo@mein.io>
This commit is contained in:
Jo-Philipp Wich 2019-08-30 15:24:45 +02:00
parent f3ab336d7c
commit fe43969336
1 changed files with 6 additions and 0 deletions
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6
include/kernel-build.mk
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@ -131,10 +131,16 @@ define BuildKernel
$(Kernel/Configure)
touch $$@
$(LINUX_DIR)/.modules: export STAGING_PREFIX=$$(STAGING_DIR_HOST)
$(LINUX_DIR)/.modules: export PKG_CONFIG_PATH=$$(STAGING_DIR_HOST)/lib/pkgconfig
$(LINUX_DIR)/.modules: export PKG_CONFIG_LIBDIR=$$(STAGING_DIR_HOST)/lib/pkgconfig
$(LINUX_DIR)/.modules: $(STAMP_CONFIGURED) $(LINUX_DIR)/.config FORCE
$(Kernel/CompileModules)
touch $$@
$(LINUX_DIR)/.image: export STAGING_PREFIX=$$(STAGING_DIR_HOST)
$(LINUX_DIR)/.image: export PKG_CONFIG_PATH=$$(STAGING_DIR_HOST)/lib/pkgconfig
$(LINUX_DIR)/.image: export PKG_CONFIG_LIBDIR=$$(STAGING_DIR_HOST)/lib/pkgconfig
$(LINUX_DIR)/.image: $(STAMP_CONFIGURED) $(if $(CONFIG_STRIP_KERNEL_EXPORTS),$(KERNEL_BUILD_DIR)/symtab.h) FORCE
$(Kernel/CompileImage)
$(Kernel/CollectDebug)