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[10/16] samples: connector: build sample program for target architecture

Message ID 20200423073929.127521-11-masahiroy@kernel.org (mailing list archive)
State New, archived
Headers show
Series kbuild: support 'userprogs' syntax | expand

Commit Message

Masahiro Yamada April 23, 2020, 7:39 a.m. UTC
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(-)
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Patch

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