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samples: pidfd: build sample program for target architecture

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This userspace program includes UAPI headers exported to usr/include/.
'make headers' always works for the target architecture (i.e. the same
architecture as the kernel), so the sample program should be built for
the target as well. Kbuild now supports 'userprogs' for that.

I also guarded the CONFIG option by 'depends on CC_CAN_LINK' because
$(CC) may not provide libc.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
This commit is contained in:
Masahiro Yamada 2020-04-29 12:45:23 +09:00
parent 28949b84b2
commit 60fb0b1239
2 changed files with 5 additions and 5 deletions
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2
samples/Kconfig
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@ -122,7 +122,7 @@ config SAMPLE_HIDRAW
config SAMPLE_PIDFD
bool "pidfd sample"
depends on HEADERS_INSTALL
depends on CC_CAN_LINK && HEADERS_INSTALL
config SAMPLE_SECCOMP
bool "Build seccomp sample code"

8
samples/pidfd/Makefile
View File

@ -1,6 +1,6 @@
# SPDX-License-Identifier: GPL-2.0
hostprogs := pidfd-metadata
always-y := $(hostprogs)
HOSTCFLAGS_pidfd-metadata.o += -I$(objtree)/usr/include
all: pidfd-metadata
usertprogs := pidfd-metadata
always-y := $(userprogs)
userccflags += -I usr/include