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From: Masahiro Yamada <masahiroy@kernel.org>
To: linux-kbuild@vger.kernel.org
Cc: bpf@vger.kernel.org, Sam Ravnborg <sam@ravnborg.org>,
	Masahiro Yamada <masahiroy@kernel.org>,
	linux-kernel@vger.kernel.org
Subject: [PATCH 10/16] samples: connector: build sample program for target architecture
Date: Thu, 23 Apr 2020 16:39:23 +0900	[thread overview]
Message-ID: <20200423073929.127521-11-masahiroy@kernel.org> (raw)
In-Reply-To: <20200423073929.127521-1-masahiroy@kernel.org>

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 must be built for
the target as well. Kbuild now supports the 'userprogs' syntax to
describe it cleanly.

$(CC) can always compile cn_text.o since it is the kenrel-space code,
but building ucon requires libc.

I guarded it by:

  always-$(CONFIG_CC_CAN_LINK) := $(userprogs)

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

 samples/connector/Makefile | 12 +++---------
 1 file changed, 3 insertions(+), 9 deletions(-)

diff --git a/samples/connector/Makefile b/samples/connector/Makefile
index b785cbde5ffa..7b5117e96fd0 100644
--- a/samples/connector/Makefile
+++ b/samples/connector/Makefile
@@ -1,13 +1,7 @@
 # SPDX-License-Identifier: GPL-2.0
 obj-$(CONFIG_SAMPLE_CONNECTOR) += cn_test.o
 
-# List of programs to build
-hostprogs := ucon
-always-y := $(hostprogs)
+userprogs := ucon
+always-$(CONFIG_CC_CAN_LINK) := $(userprogs)
 
-HOSTCFLAGS_ucon.o += -I$(objtree)/usr/include
-
-all: modules
-
-modules clean:
-	$(MAKE) -C ../.. M=$(CURDIR) $@
+user-ccflags += -I usr/include
-- 
2.25.1


  parent reply	other threads:[~2020-04-23  7:40 UTC|newest]

Thread overview: 34+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-04-23  7:39 [PATCH 00/16] kbuild: support 'userprogs' syntax Masahiro Yamada
2020-04-23  7:39 ` [PATCH 01/16] Documentation: kbuild: fix the section title format Masahiro Yamada
2020-04-23  7:39 ` [PATCH 02/16] Revert "objtool: Skip samples subdirectory" Masahiro Yamada
2020-04-24 20:32   ` Josh Poimboeuf
2020-04-29  2:43     ` Masahiro Yamada
2020-04-23  7:39 ` [PATCH 03/16] kbuild: add infrastructure to build userspace programs Masahiro Yamada
2020-04-23 15:15   ` Masahiro Yamada
2020-04-23  7:39 ` [PATCH 04/16] net: bpfilter: use 'userprogs' syntax to build bpfilter_umh Masahiro Yamada
2020-04-28  1:46   ` kbuild test robot
2020-04-28  1:46     ` kbuild test robot
2020-04-28  1:46     ` kbuild test robot
2020-04-28  5:13     ` Masahiro Yamada
2020-04-28  5:13       ` Masahiro Yamada
2020-06-08 11:56   ` Michal Kubecek
2020-06-08 13:32     ` Masahiro Yamada
2020-06-30  6:30     ` Masahiro Yamada
2020-06-30  8:57       ` Michal Kubecek
2020-06-30 16:47       ` Alexei Starovoitov
2020-04-23  7:39 ` [PATCH 05/16] samples: seccomp: build sample programs for target architecture Masahiro Yamada
2020-04-23  7:39 ` [PATCH 06/16] kbuild: doc: document the new syntax 'userprogs' Masahiro Yamada
2020-04-23  7:39 ` [PATCH 07/16] samples: uhid: fix warnings in uhid-example Masahiro Yamada
2020-04-23  7:39 ` [PATCH 08/16] samples: uhid: build sample program for target architecture Masahiro Yamada
2020-04-23  7:39 ` [PATCH 09/16] samples: hidraw: " Masahiro Yamada
2020-04-23  7:39 ` Masahiro Yamada [this message]
2020-04-23  7:39 ` [PATCH 11/16] samples: vfs: build sample programs " Masahiro Yamada
2020-04-23  7:39 ` [PATCH 12/16] samples: pidfd: build sample program " Masahiro Yamada
2020-04-23  7:39 ` [PATCH 13/16] samples: mei: " Masahiro Yamada
2020-04-23  7:39 ` [PATCH 14/16] samples: auxdisplay: use 'userprogs' syntax Masahiro Yamada
2020-04-23 11:50   ` Miguel Ojeda
2020-04-24  2:59     ` Masahiro Yamada
2020-04-23  7:39 ` [PATCH 15/16] samples: timers: " Masahiro Yamada
2020-04-23  7:39 ` [PATCH 16/16] samples: watchdog: " Masahiro Yamada
2020-04-25 11:53 ` [PATCH 00/16] kbuild: support " Sam Ravnborg
2020-04-29  2:38   ` Masahiro Yamada

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