Current make doesn't have support to pass kernel built directory
to find events.h kernel header file, so adding support for
KBUILD_OUTPUT support to Makefile.
$ make CROSS_COMPILE=arm-linux-gnueabihf- -C tools/iio
make: Entering directory '/home/a0131834/workspace/git/mainline/linux/tools/iio'
arm-linux-gnueabihf-gcc -Wall -g -D_GNU_SOURCE -c -o iio_event_monitor.o iio_event_monitor.c
arm-linux-gnueabihf-gcc -Wall -g -D_GNU_SOURCE -c -o iio_utils.o iio_utils.c
arm-linux-gnueabihf-gcc -Wall -g -D_GNU_SOURCE -c -o lsiio.o lsiio.c
arm-linux-gnueabihf-gcc -Wall -g -D_GNU_SOURCE -c -o iio_generic_buffer.o iio_generic_buffer.c
arm-linux-gnueabihf-gcc lsiio.o iio_utils.o -o lsiio
arm-linux-gnueabihf-gcc iio_generic_buffer.o iio_utils.o -o iio_generic_buffer
iio_event_monitor.c:28:30: fatal error: linux/iio/events.h: No such file or directory
#include <linux/iio/events.h>
^
compilation terminated.
<builtin>: recipe for target 'iio_event_monitor.o' failed
make: *** [iio_event_monitor.o] Error 1
make: Leaving directory '/home/a0131834/workspace/git/mainline/linux/tools/iio'
Signed-off-by: Mugunthan V N <mugunthanvnm@xxxxxx>
---
With this fix I am able to build the iio tools
$ make CROSS_COMPILE=arm-linux-gnueabihf- -C tools/iio KBUILD_OUTPUT=`pwd`
make: Entering directory '/home/a0131834/workspace/git/mainline/linux/tools/iio'
arm-linux-gnueabihf-gcc -Wall -g -D_GNU_SOURCE -I/home/a0131834/workspace/git/mainline/linux/usr/include -c -o iio_event_monitor.o iio_event_monitor.c
arm-linux-gnueabihf-gcc -Wall -g -D_GNU_SOURCE -I/home/a0131834/workspace/git/mainline/linux/usr/include -c -o iio_utils.o iio_utils.c
arm-linux-gnueabihf-gcc iio_event_monitor.o iio_utils.o -o iio_event_monitor
arm-linux-gnueabihf-gcc -Wall -g -D_GNU_SOURCE -I/home/a0131834/workspace/git/mainline/linux/usr/include -c -o lsiio.o lsiio.c
arm-linux-gnueabihf-gcc lsiio.o iio_utils.o -o lsiio
arm-linux-gnueabihf-gcc -Wall -g -D_GNU_SOURCE -I/home/a0131834/workspace/git/mainline/linux/usr/include -c -o iio_generic_buffer.o iio_generic_buffer.c
arm-linux-gnueabihf-gcc iio_generic_buffer.o iio_utils.o -o iio_generic_buffer
make: Leaving directory '/home/a0131834/workspace/git/mainline/linux/tools/iio'
---
tools/iio/Makefile | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/tools/iio/Makefile b/tools/iio/Makefile
index 5446d62..0ec3ea0 100644
--- a/tools/iio/Makefile
+++ b/tools/iio/Makefile
@@ -1,5 +1,6 @@
CC = $(CROSS_COMPILE)gcc
-CFLAGS += -Wall -g -D_GNU_SOURCE
+KBUILD_OUTPUT ?= /lib/modules/$(shell uname -r)/build
+CFLAGS += -Wall -g -D_GNU_SOURCE -I$(KBUILD_OUTPUT)/usr/include
BINDIR=usr/bin
INSTALL_PROGRAM=install -m 755 -p
--
2.9.2.664.ga0a1831
--
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