From: "Wangnan (F)" <wangnan0@huawei.com>
To: <acme@kernel.org>
Cc: <linux-kernel@vger.kernel.org>, <joe@ovn.org>,
Alexei Starovoitov <ast@fb.com>,
Arnaldo Carvalho de Melo <acme@redhat.com>,
He Kuang <hekuang@huawei.com>, Jiri Olsa <jolsa@kernel.org>,
Zefan Li <lizefan@huawei.com>, <pi3orama@163.com>
Subject: Re: [PATCH v4 01/18] perf build: Check LLVM version in feature check
Date: Tue, 6 Dec 2016 15:20:05 +0800 [thread overview]
Message-ID: <584666A5.7090309@huawei.com> (raw)
In-Reply-To: <20161206071356.5312-2-wangnan0@huawei.com>
On 2016/12/6 15:13, Wang Nan wrote:
> Cancel builtin llvm and clang support when LLVM version is
> less than 3.9.0: following commits uses newer API.
>
> Since Clang/LLVM's API is not guaranteed to be stable,
> add a test-llvm-version.cpp feature checker, issue warning if
> LLVM found in compiling environment is not tested yet.
>
> Signed-off-by: Wang Nan <wangnan0@huawei.com>
> Cc: Alexei Starovoitov <ast@fb.com>
> Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
> Cc: He Kuang <hekuang@huawei.com>
> Cc: Jiri Olsa <jolsa@kernel.org>
> Cc: Joe Stringer <joe@ovn.org>
> Cc: Zefan Li <lizefan@huawei.com>
> Cc: pi3orama@163.com
> ---
> tools/build/feature/Makefile | 8 ++++++--
> tools/build/feature/test-llvm-version.cpp | 12 ++++++++++++
> tools/build/feature/test-llvm.cpp | 5 +++++
> tools/perf/Makefile.config | 8 ++++++--
> 4 files changed, 29 insertions(+), 4 deletions(-)
> create mode 100644 tools/build/feature/test-llvm-version.cpp
[SNIP]
> diff --git a/tools/build/feature/test-llvm-version.cpp b/tools/build/feature/test-llvm-version.cpp
> new file mode 100644
> index 0000000..e86b642
> --- /dev/null
> +++ b/tools/build/feature/test-llvm-version.cpp
> @@ -0,0 +1,12 @@
> +#include <cstdio>
> +#include "llvm/Config/llvm-config.h"
> +
> +#define NUM_VERSION (((LLVM_VERSION_MAJOR) << 16) + (LLVM_VERSION_MINOR << 8) + LLVM_VERSION_PATCH)
> +#define pass int main() {printf("%x\n", NUM_VERSION); return 0;}
> +
> +#if NUM_VERSION >= 0x030900
> +pass
> +#else
> +# error This LLVM is not tested yet.
> +#endif
> +
Sorry for this blank line. Will resend.
next prev parent reply other threads:[~2016-12-06 7:20 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-12-06 7:13 [PATCH v4 00/18] perf clang: Builtin clang and perfhook support Wang Nan
2016-12-06 7:13 ` [PATCH v4 01/18] perf build: Check LLVM version in feature check Wang Nan
2016-12-06 7:20 ` Wangnan (F) [this message]
2016-12-06 7:22 ` [PATCH v4 01/18 -cleanup] " Wang Nan
2016-12-06 14:02 ` Arnaldo Carvalho de Melo
2016-12-07 18:22 ` [tip:perf/core] " tip-bot for Wang Nan
2016-12-06 7:13 ` [PATCH v4 02/18] perf build: Support dynamic linking clang libraries Wang Nan
2016-12-06 7:13 ` [PATCH v4 03/18] perf clang: Cleanup clang options Wang Nan
2016-12-06 7:13 ` [PATCH v4 04/18] perf clang: Pass full path to builtin clang Wang Nan
2016-12-06 7:13 ` [PATCH v4 05/18] perf clang: Pass CFLAGS " Wang Nan
2016-12-06 7:13 ` [PATCH v4 06/18] perf clang jit: Wrap llvm::Module using PerfModule Wang Nan
2016-12-06 7:13 ` [PATCH v4 07/18] perf clang jit: Insignt BPF and JIT functions in a Module Wang Nan
2016-12-06 7:13 ` [PATCH v4 08/18] perf clang jit: add PerfModule::doJIT to JIT perfhook functions Wang Nan
2016-12-06 7:13 ` [PATCH v4 09/18] perf clang jit: Export functions for jitted code Wang Nan
2016-12-06 7:13 ` [PATCH v4 10/18] perf clang jit: Actually JIT and hook in bpf loader Wang Nan
2016-12-06 7:13 ` [PATCH v4 11/18] perf clang jit: Collect the lowest address in maps section as map_base Wang Nan
2016-12-06 7:13 ` [PATCH v4 12/18] perf clang jit: Retrive fd of BPF map from its offset Wang Nan
2016-12-06 7:13 ` [PATCH v4 13/18] perf clang jit: Allow jitted perf hook access BPF maps Wang Nan
2016-12-06 7:13 ` [PATCH v4 14/18] perf clang: Link BPF functions declaration into perf Wang Nan
2016-12-06 7:13 ` [PATCH v4 15/18] perf clang: Declare BPF functions for BPF scripts automatically Wang Nan
2016-12-06 7:13 ` [PATCH v4 16/18] perf clang: Include helpers to BPF scripts Wang Nan
2016-12-06 7:13 ` [PATCH v4 17/18] perf clang builtin: Define hook helpers by default Wang Nan
2016-12-06 7:13 ` [PATCH v4 18/18] perf clang jit: Export getpid() to perf hook Wang Nan
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