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SubjectRe: [PATCH v3 bpf-next 13/14] samples: bpf: makefile: add sysroot support
On Tue, Sep 17, 2019 at 10:23:57PM -0700, Andrii Nakryiko wrote:
>On Mon, Sep 16, 2019 at 4:00 AM Ivan Khoronzhuk
><ivan.khoronzhuk@linaro.org> wrote:
>>
>> Basically it only enables that was added by previous couple fixes.
>> Sysroot contains correct libs installed and its headers ofc. Useful
>
>Please, let's not use unnecessary abbreviations/slang. "Of course" is
>not too long and is a proper English, let's stick to it.
>
>> when working with NFC or virtual machine.
>>
>> Usage:
>>
>> clean (on demand)
>> make ARCH=arm -C samples/bpf clean
>> make ARCH=arm -C tools clean
>> make ARCH=arm clean
>>
>> configure and install headers:
>>
>> make ARCH=arm defconfig
>> make ARCH=arm headers_install
>>
>> build samples/bpf:
>> make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- samples/bpf/ \
>> SYSROOT="path/to/sysroot"
>>
>> Signed-off-by: Ivan Khoronzhuk <ivan.khoronzhuk@linaro.org>
>> ---
>> samples/bpf/Makefile | 5 +++++
>> 1 file changed, 5 insertions(+)
>>
>> diff --git a/samples/bpf/Makefile b/samples/bpf/Makefile
>> index 133123d4c7d7..57ddf055d6c3 100644
>> --- a/samples/bpf/Makefile
>> +++ b/samples/bpf/Makefile
>> @@ -194,6 +194,11 @@ TPROGS_CFLAGS += -I$(srctree)/tools/lib/
>> TPROGS_CFLAGS += -I$(srctree)/tools/include
>> TPROGS_CFLAGS += -I$(srctree)/tools/perf
>>
>> +ifdef SYSROOT
>> +TPROGS_CFLAGS += --sysroot=${SYSROOT}
>> +TPROGS_LDFLAGS := -L${SYSROOT}/usr/lib
>
>Please stay consistent: $() instead of ${}?
Yes, thanks.

>
>> +endif
>> +
>> EXTRA_CXXFLAGS := $(TPROGS_CFLAGS)
>>
>> # options not valid for C++
>> --
>> 2.17.1
>>

--
Regards,
Ivan Khoronzhuk

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