netdev - [PATCH bpf] samples/bpf: kbuild: add CONFIG_SAMPLE

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Date:   Tue,  1 Oct 2019 12:14:29 +0200
From:   Björn Töpel <bjorn.topel@...il.com>
To:     netdev@...r.kernel.org, ast@...nel.org, daniel@...earbox.net
Cc:     Björn Töpel <bjorn.topel@...el.com>,
        linux-kbuild@...r.kernel.org, bpf@...r.kernel.org,
        yamada.masahiro@...ionext.com
Subject: [PATCH bpf] samples/bpf: kbuild: add CONFIG_SAMPLE_BPF Kconfig

From: Björn Töpel <bjorn.topel@...el.com>

This commit makes it possible to build the BPF samples via a Kconfig
option, CONFIG_SAMPLE_BPF. Further, it fixes that samples/bpf/ could
not be built due to a missing samples/Makefile subdir-y entry, after
the introduction of commit 394053f4a4b3 ("kbuild: make single targets
work more correctly").

Signed-off-by: Björn Töpel <bjorn.topel@...el.com>
---
 samples/Kconfig  | 4 ++++
 samples/Makefile | 1 +
 2 files changed, 5 insertions(+)

diff --git a/samples/Kconfig b/samples/Kconfig
index c8dacb4dda80..054297ac89ad 100644
--- a/samples/Kconfig
+++ b/samples/Kconfig
@@ -169,4 +169,8 @@ config SAMPLE_VFS
 	  as mount API and statx().  Note that this is restricted to the x86
 	  arch whilst it accesses system calls that aren't yet in all arches.
 
+config SAMPLE_BPF
+	bool "BPF samples"
+	depends on HEADERS_INSTALL
+
 endif # SAMPLES
diff --git a/samples/Makefile b/samples/Makefile
index 7d6e4ca28d69..49aa2f7d044b 100644
--- a/samples/Makefile
+++ b/samples/Makefile
@@ -20,3 +20,4 @@ obj-$(CONFIG_SAMPLE_TRACE_PRINTK)	+= trace_printk/
 obj-$(CONFIG_VIDEO_PCI_SKELETON)	+= v4l/
 obj-y					+= vfio-mdev/
 subdir-$(CONFIG_SAMPLE_VFS)		+= vfs
+subdir-$(CONFIG_SAMPLE_BPF)		+= bpf
-- 
2.20.1