linux-kernel - Re: [PATCH 1/1] selftests: gpio: use pkg-config to determine libmount CFLAGS/LDLIBS

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Message-ID: <CAFy1USR-kWgR3FUfnMjysxyR09zW48EYPAfxOVO-spBr_gJGAw@mail.gmail.com>
Date:   Fri, 30 Jun 2017 10:20:22 +0800
From:   Bamvor Zhang Jian <bamvor.zhangjian@...aro.org>
To:     Fathi Boudra <fathi.boudra@...aro.org>
Cc:     Michael Ellerman <mpe@...erman.id.au>,
        linux-kselftest@...r.kernel.org, Shuah Khan <shuah@...nel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/1] selftests: gpio: use pkg-config to determine libmount CFLAGS/LDLIBS

On 29 June 2017 at 19:39, Fathi Boudra <fathi.boudra@...aro.org> wrote:
> On 29 June 2017 at 12:01, Michael Ellerman <mpe@...erman.id.au> wrote:
>> Fathi Boudra <fathi.boudra@...aro.org> writes:
>>
>>> Fix hardcoded and misplaced libmount headers. Use pkg-config instead to
>>> figure out CFLAGS/LDLIBS, fixing also their value for cross-compilation.
>>
>> Can you explain how it fixes the values for cross-compilation?
>
> When pkg-config is invoked in a cross-build environment, it will
> return your sysroot headers path instead of the hardcoded
> -I/usr/include/libmount
>
> For example in my oe environment, when I invoke "pkg-config --cflags
> mount", it returns:
> -I/build/tmp-rpb-glibc/sysroots/hikey/usr/include/libmount
I suppose we could also pass the extra CFLAGS and LDFLAGS directly to
make it work. correct?

Regards

Bamvor
>
>> cheers
>> --
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