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Date:   Wed, 5 Sep 2018 08:13:45 -0600
From:   Shuah Khan <shuah@...nel.org>
To:     Anders Roxell <anders.roxell@...aro.org>,
        yamada.masahiro@...ionext.com, michal.lkml@...kovi.net,
        bamv2005@...il.com, brgl@...ev.pl, pbonzini@...hat.com,
        akpm@...ux-foundation.org, rppt@...ux.vnet.ibm.com,
        aarcange@...hat.com
Cc:     linux-kbuild@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-kselftest@...r.kernel.org, netdev@...r.kernel.org,
        Shuah Khan <shuah@...nel.org>
Subject: Re: [PATCH v6] selftests: add headers_install to lib.mk

On 09/04/2018 04:47 AM, Anders Roxell wrote:
> If the kernel headers aren't installed we can't build all the tests.
> Add a new make target rule 'khdr' in the file lib.mk to generate the
> kernel headers and that gets include for every test-dir Makefile that
> includes lib.mk If the testdir in turn have its own sub-dirs the
> top_srcdir needs to be set to the linux-rootdir to be able to generate
> the kernel headers.
> 
> Signed-off-by: Anders Roxell <anders.roxell@...aro.org>
> Reviewed-by: Fathi Boudra <fathi.boudra@...aro.org>
> ---
> 
> I sent this (v5) a month ago and wondered if it got lost. Resending
> unchanged.
> 
> Cheers,
> Anders
> 
>  Makefile                                           | 14 +-------------
>  scripts/subarch.include                            | 13 +++++++++++++
>  tools/testing/selftests/android/Makefile           |  2 +-
>  tools/testing/selftests/android/ion/Makefile       |  2 ++
>  tools/testing/selftests/futex/functional/Makefile  |  1 +
>  tools/testing/selftests/gpio/Makefile              |  7 ++-----
>  tools/testing/selftests/kvm/Makefile               |  7 ++-----
>  tools/testing/selftests/lib.mk                     | 12 ++++++++++++
>  tools/testing/selftests/net/Makefile               |  1 +
>  .../selftests/networking/timestamping/Makefile     |  1 +
>  tools/testing/selftests/vm/Makefile                |  4 ----
>  11 files changed, 36 insertions(+), 28 deletions(-)
>  create mode 100644 scripts/subarch.include
> 
> diff --git a/Makefile b/Makefile
> index 19948e556941..9c781e77fa24 100644
> --- a/Makefile
> +++ b/Makefile
> @@ -299,19 +299,7 @@ KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
>  KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION)
>  export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
>  
> -# SUBARCH tells the usermode build what the underlying arch is.  That is set
> -# first, and if a usermode build is happening, the "ARCH=um" on the command
> -# line overrides the setting of ARCH below.  If a native build is happening,
> -# then ARCH is assigned, getting whatever value it gets normally, and
> -# SUBARCH is subsequently ignored.
> -
> -SUBARCH := $(shell uname -m | sed -e s/i.86/x86/ -e s/x86_64/x86/ \
> -				  -e s/sun4u/sparc64/ \
> -				  -e s/arm.*/arm/ -e s/sa110/arm/ \
> -				  -e s/s390x/s390/ -e s/parisc64/parisc/ \
> -				  -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
> -				  -e s/sh[234].*/sh/ -e s/aarch64.*/arm64/ \
> -				  -e s/riscv.*/riscv/)
> +include scripts/subarch.include
>  
>  # Cross compiling and selecting different set of gcc/bin-utils
>  # ---------------------------------------------------------------------------
> diff --git a/scripts/subarch.include b/scripts/subarch.include
> new file mode 100644
> index 000000000000..650682821126
> --- /dev/null
> +++ b/scripts/subarch.include
> @@ -0,0 +1,13 @@
> +# SUBARCH tells the usermode build what the underlying arch is.  That is set
> +# first, and if a usermode build is happening, the "ARCH=um" on the command
> +# line overrides the setting of ARCH below.  If a native build is happening,
> +# then ARCH is assigned, getting whatever value it gets normally, and
> +# SUBARCH is subsequently ignored.
> +
> +SUBARCH := $(shell uname -m | sed -e s/i.86/x86/ -e s/x86_64/x86/ \
> +				  -e s/sun4u/sparc64/ \
> +				  -e s/arm.*/arm/ -e s/sa110/arm/ \
> +				  -e s/s390x/s390/ -e s/parisc64/parisc/ \
> +				  -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
> +				  -e s/sh[234].*/sh/ -e s/aarch64.*/arm64/ \
> +				  -e s/riscv.*/riscv/)
> diff --git a/tools/testing/selftests/android/Makefile b/tools/testing/selftests/android/Makefile
> index 72c25a3cb658..d9a725478375 100644
> --- a/tools/testing/selftests/android/Makefile
> +++ b/tools/testing/selftests/android/Makefile
> @@ -6,7 +6,7 @@ TEST_PROGS := run.sh
>  
>  include ../lib.mk
>  
> -all:
> +all: khdr
>  	@for DIR in $(SUBDIRS); do		\
>  		BUILD_TARGET=$(OUTPUT)/$$DIR;	\
>  		mkdir $$BUILD_TARGET  -p;	\
> diff --git a/tools/testing/selftests/android/ion/Makefile b/tools/testing/selftests/android/ion/Makefile
> index e03695287f76..88cfe88e466f 100644
> --- a/tools/testing/selftests/android/ion/Makefile
> +++ b/tools/testing/selftests/android/ion/Makefile
> @@ -10,6 +10,8 @@ $(TEST_GEN_FILES): ipcsocket.c ionutils.c
>  
>  TEST_PROGS := ion_test.sh
>  
> +KSFT_KHDR_INSTALL := 1
> +top_srcdir = ../../../../..
>  include ../../lib.mk
>  
>  $(OUTPUT)/ionapp_export: ionapp_export.c ipcsocket.c ionutils.c
> diff --git a/tools/testing/selftests/futex/functional/Makefile b/tools/testing/selftests/futex/functional/Makefile
> index ff8feca49746..ad1eeb14fda7 100644
> --- a/tools/testing/selftests/futex/functional/Makefile
> +++ b/tools/testing/selftests/futex/functional/Makefile
> @@ -18,6 +18,7 @@ TEST_GEN_FILES := \
>  
>  TEST_PROGS := run.sh
>  
> +top_srcdir = ../../../../..
>  include ../../lib.mk
>  
>  $(TEST_GEN_FILES): $(HEADERS)
> diff --git a/tools/testing/selftests/gpio/Makefile b/tools/testing/selftests/gpio/Makefile
> index 1bbb47565c55..4665cdbf1a8d 100644
> --- a/tools/testing/selftests/gpio/Makefile
> +++ b/tools/testing/selftests/gpio/Makefile
> @@ -21,11 +21,8 @@ endef
>  CFLAGS += -O2 -g -std=gnu99 -Wall -I../../../../usr/include/
>  LDLIBS += -lmount -I/usr/include/libmount
>  
> -$(BINARIES): ../../../gpio/gpio-utils.o ../../../../usr/include/linux/gpio.h
> +$(BINARIES):| khdr
> +$(BINARIES): ../../../gpio/gpio-utils.o
>  
>  ../../../gpio/gpio-utils.o:
>  	make ARCH=$(ARCH) CROSS_COMPILE=$(CROSS_COMPILE) -C ../../../gpio
> -
> -../../../../usr/include/linux/gpio.h:
> -	make -C ../../../.. headers_install INSTALL_HDR_PATH=$(shell pwd)/../../../../usr/
> -
> diff --git a/tools/testing/selftests/kvm/Makefile b/tools/testing/selftests/kvm/Makefile
> index 03b0f551bedf..87d1a8488af8 100644
> --- a/tools/testing/selftests/kvm/Makefile
> +++ b/tools/testing/selftests/kvm/Makefile
> @@ -37,9 +37,6 @@ $(LIBKVM_OBJ): $(OUTPUT)/%.o: %.c
>  $(OUTPUT)/libkvm.a: $(LIBKVM_OBJ)
>  	$(AR) crs $@ $^
>  
> -$(LINUX_HDR_PATH):
> -	make -C $(top_srcdir) headers_install
> -
> -all: $(STATIC_LIBS) $(LINUX_HDR_PATH)
> +all: $(STATIC_LIBS)
>  $(TEST_GEN_PROGS): $(STATIC_LIBS)
> -$(TEST_GEN_PROGS) $(LIBKVM_OBJ): | $(LINUX_HDR_PATH)
> +$(STATIC_LIBS):| khdr
> diff --git a/tools/testing/selftests/lib.mk b/tools/testing/selftests/lib.mk
> index 17ab36605a8e..0a8e75886224 100644
> --- a/tools/testing/selftests/lib.mk
> +++ b/tools/testing/selftests/lib.mk
> @@ -16,8 +16,20 @@ TEST_GEN_PROGS := $(patsubst %,$(OUTPUT)/%,$(TEST_GEN_PROGS))
>  TEST_GEN_PROGS_EXTENDED := $(patsubst %,$(OUTPUT)/%,$(TEST_GEN_PROGS_EXTENDED))
>  TEST_GEN_FILES := $(patsubst %,$(OUTPUT)/%,$(TEST_GEN_FILES))
>  
> +top_srcdir ?= ../../../..
> +include $(top_srcdir)/scripts/subarch.include
> +ARCH		?= $(SUBARCH)
> +
>  all: $(TEST_GEN_PROGS) $(TEST_GEN_PROGS_EXTENDED) $(TEST_GEN_FILES)
>  
> +.PHONY: khdr
> +khdr:
> +	make ARCH=$(ARCH) -C $(top_srcdir) headers_install
> +
> +ifdef KSFT_KHDR_INSTALL
> +$(TEST_GEN_PROGS) $(TEST_GEN_PROGS_EXTENDED) $(TEST_GEN_FILES):| khdr
> +endif
> +
>  .ONESHELL:
>  define RUN_TEST_PRINT_RESULT
>  	TEST_HDR_MSG="selftests: "`basename $$PWD`:" $$BASENAME_TEST";	\
> diff --git a/tools/testing/selftests/net/Makefile b/tools/testing/selftests/net/Makefile
> index cccdb2295567..256d82d5fa87 100644
> --- a/tools/testing/selftests/net/Makefile
> +++ b/tools/testing/selftests/net/Makefile
> @@ -15,6 +15,7 @@ TEST_GEN_FILES += udpgso udpgso_bench_tx udpgso_bench_rx ip_defrag
>  TEST_GEN_PROGS = reuseport_bpf reuseport_bpf_cpu reuseport_bpf_numa
>  TEST_GEN_PROGS += reuseport_dualstack reuseaddr_conflict tls
>  
> +KSFT_KHDR_INSTALL := 1
>  include ../lib.mk
>  
>  $(OUTPUT)/reuseport_bpf_numa: LDFLAGS += -lnuma
> diff --git a/tools/testing/selftests/networking/timestamping/Makefile b/tools/testing/selftests/networking/timestamping/Makefile
> index a728040edbe1..14cfcf006936 100644
> --- a/tools/testing/selftests/networking/timestamping/Makefile
> +++ b/tools/testing/selftests/networking/timestamping/Makefile
> @@ -5,6 +5,7 @@ TEST_PROGS := hwtstamp_config rxtimestamp timestamping txtimestamp
>  
>  all: $(TEST_PROGS)
>  
> +top_srcdir = ../../../../..
>  include ../../lib.mk
>  
>  clean:
> diff --git a/tools/testing/selftests/vm/Makefile b/tools/testing/selftests/vm/Makefile
> index 9881876d2aa0..e94b7b14bcb2 100644
> --- a/tools/testing/selftests/vm/Makefile
> +++ b/tools/testing/selftests/vm/Makefile
> @@ -26,10 +26,6 @@ TEST_PROGS := run_vmtests
>  
>  include ../lib.mk
>  
> -$(OUTPUT)/userfaultfd: ../../../../usr/include/linux/kernel.h
>  $(OUTPUT)/userfaultfd: LDLIBS += -lpthread
>  
>  $(OUTPUT)/mlock-random-test: LDLIBS += -lcap
> -
> -../../../../usr/include/linux/kernel.h:
> -	make -C ../../../.. headers_install
> 

I queued this up in linux-kselftest next to be included in my next
pull request.

thanks,
-- Shuah

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