linux-kernel - [PATCH 15/16] samples: timers: use 'userprogs' syntax

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Date:   Thu, 23 Apr 2020 16:39:28 +0900
From:   Masahiro Yamada <masahiroy@...nel.org>
To:     linux-kbuild@...r.kernel.org
Cc:     bpf@...r.kernel.org, Sam Ravnborg <sam@...nborg.org>,
        Masahiro Yamada <masahiroy@...nel.org>,
        linux-kernel@...r.kernel.org
Subject: [PATCH 15/16] samples: timers: use 'userprogs' syntax

Kbuild now supports the 'userprogs' syntax to describe the build rules
of userspace programs for the target architecture (i.e. the same
architecture as the kernel).

Add the entry to samples/Makefile to put this into the build bot
coverage.

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

Signed-off-by: Masahiro Yamada <masahiroy@...nel.org>
---

 samples/Kconfig         |  4 ++++
 samples/Makefile        |  1 +
 samples/timers/Makefile | 17 +++--------------
 3 files changed, 8 insertions(+), 14 deletions(-)

diff --git a/samples/Kconfig b/samples/Kconfig
index cdb0091e4734..55548a487d3c 100644
--- a/samples/Kconfig
+++ b/samples/Kconfig
@@ -135,6 +135,10 @@ config SAMPLE_SECCOMP
 	  Build samples of seccomp filters using various methods of
 	  BPF filter construction.
 
+config SAMPLE_TIMER
+	bool "Build timer sample code"
+	depends on CC_CAN_LINK && HEADERS_INSTALL
+
 config SAMPLE_UHID
 	bool "Build UHID sample code"
 	depends on CC_CAN_LINK && HEADERS_INSTALL
diff --git a/samples/Makefile b/samples/Makefile
index 0c43b5d34b15..042208326689 100644
--- a/samples/Makefile
+++ b/samples/Makefile
@@ -16,6 +16,7 @@ subdir-$(CONFIG_SAMPLE_PIDFD)		+= pidfd
 obj-$(CONFIG_SAMPLE_QMI_CLIENT)		+= qmi/
 obj-$(CONFIG_SAMPLE_RPMSG_CLIENT)	+= rpmsg/
 subdir-$(CONFIG_SAMPLE_SECCOMP)		+= seccomp
+subdir-$(CONFIG_SAMPLE_TIMER)		+= timers
 obj-$(CONFIG_SAMPLE_TRACE_EVENTS)	+= trace_events/
 obj-$(CONFIG_SAMPLE_TRACE_PRINTK)	+= trace_printk/
 obj-$(CONFIG_SAMPLE_FTRACE_DIRECT)	+= ftrace/
diff --git a/samples/timers/Makefile b/samples/timers/Makefile
index f9fa07460802..c5f46e8caa80 100644
--- a/samples/timers/Makefile
+++ b/samples/timers/Makefile
@@ -1,16 +1,5 @@
 # SPDX-License-Identifier: GPL-2.0
-ifndef CROSS_COMPILE
-uname_M := $(shell uname -m 2>/dev/null || echo not)
-ARCH ?= $(shell echo $(uname_M) | sed -e s/i.86/x86/ -e s/x86_64/x86/)
+userprogs := hpet_example
+always-y := $(userprogs)
 
-ifeq ($(ARCH),x86)
-CC := $(CROSS_COMPILE)gcc
-PROGS := hpet_example
-
-all: $(PROGS)
-
-clean:
-	rm -fr $(PROGS)
-
-endif
-endif
+user-ccflags += -I usr/include
-- 
2.25.1