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samples/bpf: like LLC also verify and allow redefining CLANG command

Telusuri Sumber 
Users are likely to manually compile both LLVM 'llc' and 'clang'
tools.  Thus, also allow redefining CLANG and verify command exist.

Makefile implementation wise, the target that verify the command have
been generalized.

Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jesper Dangaard Brouer
2016-04-28 14:21:14 +02:00
committed by David S. Miller
orang tua b62a796c10
melakukan bdefbbf2ec
2 mengubah file dengan 17 tambahan dan 14 penghapusan
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samples/bpf/README.rst
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@@ -60,7 +60,7 @@ Quick sniplet for manually compiling LLVM and clang
$ cmake .. -DLLVM_TARGETS_TO_BUILD="BPF;X86"
$ make -j $(getconf _NPROCESSORS_ONLN)
It is also possible to point make to the newly compiled 'llc' command
via redefining LLC on the make command line::
It is also possible to point make to the newly compiled 'llc' or
'clang' command via redefining LLC or CLANG on the make command line::
make samples/bpf/ LLC=~/git/llvm/build/bin/llc
make samples/bpf/ LLC=~/git/llvm/build/bin/llc CLANG=~/git/llvm/build/bin/clang