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SubjectRe: [PATCH] tools: iio: add ability to pass kernel headers
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On 11/04/17 12:06, Sekhar Nori wrote:
> Very often, especially when cross compiling, there is a need
> to pass kernel headers different from those installed on the
> build machine.
>
> Add support for doing this for iio utils by using the
> 'INSTALL_HDR_PATH' environment variable. This is supported by
> 'make headers_install' for installing kernel headers at a
> user specified location. So you will do:
>
> $ make headers_install ARCH=arm INSTALL_HDR_PATH=<absolute-path>
> $ make -C tools/iio ARCH=arm INSTALL_HDR_PATH=<absolute-path>
>
> Signed-off-by: Sekhar Nori <nsekhar@ti.com>

It's a bit of an oddity as that usually refers to where to put
the headers rather than where they are.

Is there a more general solution? I couldn't find anything
particularly consistent in tools.
> ---
> tools/iio/Makefile | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/tools/iio/Makefile b/tools/iio/Makefile
> index 5446d625e17d..75607043d6e2 100644
> --- a/tools/iio/Makefile
> +++ b/tools/iio/Makefile
> @@ -1,5 +1,5 @@
> CC = $(CROSS_COMPILE)gcc
> -CFLAGS += -Wall -g -D_GNU_SOURCE
> +CFLAGS += -Wall -g -D_GNU_SOURCE -I$(INSTALL_HDR_PATH)/include
>
> BINDIR=usr/bin
> INSTALL_PROGRAM=install -m 755 -p
>

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