kumquat-buildroot/linux/linux-tool-selftests.mk
Cyril Bur 8143721c3e linux: build and install kernel selftests
This patch adds the ability to compile and install the kernel
selftests into the target at /usr/lib/kselftests. The rationale behind
/usr/lib is that the selftests have subdirectories where they are
installed which makes them unsuitable to be placed in /usr/sbin as
this would result in /usr/sbin/kselftests/x/y/z. While the selftests
aren't libraries either, they don't achieve much as a standalone
binary so they can be considered to be a 'library of tests' making
/usr/lib sensible.

The selftests require that the kernel headers be installed into the
kernel build tree as some of the selftests have a hardcoded CFLAGS to
include kernel headers (CFLAGS += -I../../../../usr/include/). This is
most easily achieved by using the make ... headers_install inside the
kernel build dir.

This is likely to be a rarely used debugging/performance feature for
development and unlikely to be used in a production configuration.

Signed-off-by: Cyril Bur <cyrilbur@gmail.com>
Reviewed-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Tested-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
[Thomas:
 - remove bash as a build dependency, it is only a runtime dependency.
 - fix typo in the Config.in help text, and rewrap
 - add missing 'depends on BR2_USE_MMU' dependency for the comment.]
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
2016-03-20 22:04:47 +01:00

47 lines
1.4 KiB
Makefile

################################################################################
#
# selftests
#
################################################################################
LINUX_TOOLS += selftests
ifeq ($(KERNEL_ARCH),x86_64)
SELFTESTS_ARCH=x86
else
ifeq ($(KERNEL_ARCH),i386)
SELFTESTS_ARCH=x86
else
SELFTESTS_ARCH=$(KERNEL_ARCH)
endif
endif
SELFTESTS_DEPENDENCIES = libcap-ng popt
SELFTESTS_MAKE_FLAGS = \
$(LINUX_MAKE_FLAGS) \
ARCH=$(SELFTESTS_ARCH)
# O must be redefined here to overwrite the one used by Buildroot for
# out of tree build. We build the selftests in $(@D)/tools/selftests and
# not just $(@D) so that it isn't built in the root directory of the kernel
# sources.
#
# The headers_install step here is important as some kernel selftests use a
# hardcoded CFLAGS to find kernel headers e.g:
# CFLAGS += -I../../../../usr/include/
# The headers_install target will install the kernel headers locally inside
# the Linux build dir
define SELFTESTS_BUILD_CMDS
$(TARGET_MAKE_ENV) $(MAKE1) -C $(@D) $(SELFTESTS_MAKE_FLAGS) \
headers_install
$(TARGET_MAKE_ENV) $(MAKE1) -C $(@D)/tools/testing/selftests \
$(SELFTESTS_MAKE_FLAGS) O=$(@D)/tools/testing/selftests
endef
define SELFTESTS_INSTALL_TARGET_CMDS
$(TARGET_MAKE_ENV) $(MAKE1) -C $(@D)/tools/testing/selftests \
$(SELFTESTS_MAKE_FLAGS) O=$(@D)/tools/testing/selftests \
INSTALL_PATH=$(TARGET_DIR)/usr/lib/kselftests install
endef