From patchwork Mon Dec 5 21:37:54 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Arnaldo Carvalho de Melo X-Patchwork-Id: 86639 Delivered-To: patch@linaro.org Received: by 10.140.20.101 with SMTP id 92csp1709058qgi; Mon, 5 Dec 2016 13:39:58 -0800 (PST) X-Received: by 10.99.204.81 with SMTP id q17mr106321936pgi.168.1480973998157; Mon, 05 Dec 2016 13:39:58 -0800 (PST) Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id b8si16003541pgn.179.2016.12.05.13.39.57; Mon, 05 Dec 2016 13:39:58 -0800 (PST) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753072AbcLEVjw (ORCPT + 25 others); Mon, 5 Dec 2016 16:39:52 -0500 Received: from merlin.infradead.org ([205.233.59.134]:35076 "EHLO merlin.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752706AbcLEVia (ORCPT ); Mon, 5 Dec 2016 16:38:30 -0500 Received: from [187.65.42.115] (helo=jouet.infradead.org) by merlin.infradead.org with esmtpsa (Exim 4.85_2 #1 (Red Hat Linux)) id 1cE0xk-0005Eq-Dz; Mon, 05 Dec 2016 21:38:16 +0000 Received: by jouet.infradead.org (Postfix, from userid 1000) id D61E3140500; Mon, 5 Dec 2016 18:38:10 -0300 (BRT) From: Arnaldo Carvalho de Melo To: Ingo Molnar Cc: linux-kernel@vger.kernel.org, Wang Nan , Alexei Starovoitov , He Kuang , Jiri Olsa , Joe Stringer , Zefan Li , pi3orama@163.com, Arnaldo Carvalho de Melo Subject: [PATCH 06/20] tools build: Add feature detection for clang Date: Mon, 5 Dec 2016 18:37:54 -0300 Message-Id: <20161205213808.6231-7-acme@kernel.org> X-Mailer: git-send-email 2.9.3 In-Reply-To: <20161205213808.6231-1-acme@kernel.org> References: <20161205213808.6231-1-acme@kernel.org> X-SRS-Rewrite: SMTP reverse-path rewritten from by merlin.infradead.org. See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Wang Nan Check if basic clang compiling environment is ready. Doesn't like 'llvm-config --libs' which can returns llvm libraries in right order and duplicates some libraries if necessary, there's no correspondence for clang libraries (-lclangxxx). to avoid extra complexity and to avoid new clang breaking libraries ordering, use --start-group and --end-group. In this test case, manually identify required clang libs and hope it to be stable. Putting all clang libraries here is possible (use make's wildcard), but then feature checking becomes very slow. Signed-off-by: Wang Nan Cc: Alexei Starovoitov Cc: He Kuang Cc: Jiri Olsa Cc: Joe Stringer Cc: Zefan Li Cc: pi3orama@163.com Link: http://lkml.kernel.org/r/20161126070354.141764-9-wangnan0@huawei.com Signed-off-by: Arnaldo Carvalho de Melo --- tools/build/feature/Makefile | 10 ++++++++++ tools/build/feature/test-clang.cpp | 21 +++++++++++++++++++++ 2 files changed, 31 insertions(+) create mode 100644 tools/build/feature/test-clang.cpp -- 2.9.3 diff --git a/tools/build/feature/Makefile b/tools/build/feature/Makefile index c09de59affc9..871d5536951d 100644 --- a/tools/build/feature/Makefile +++ b/tools/build/feature/Makefile @@ -237,6 +237,16 @@ $(OUTPUT)test-llvm.bin: $(shell $(LLVM_CONFIG) --libs Core BPF) \ $(shell $(LLVM_CONFIG) --system-libs) +$(OUTPUT)test-clang.bin: + $(BUILDXX) -std=gnu++11 \ + -I$(shell $(LLVM_CONFIG) --includedir) \ + -L$(shell $(LLVM_CONFIG) --libdir) \ + -Wl,--start-group -lclangBasic -lclangDriver \ + -lclangFrontend -lclangEdit -lclangLex \ + -lclangAST -Wl,--end-group \ + $(shell $(LLVM_CONFIG) --libs Core option) \ + $(shell $(LLVM_CONFIG) --system-libs) + -include $(OUTPUT)*.d ############################### diff --git a/tools/build/feature/test-clang.cpp b/tools/build/feature/test-clang.cpp new file mode 100644 index 000000000000..e23c1b1f1b91 --- /dev/null +++ b/tools/build/feature/test-clang.cpp @@ -0,0 +1,21 @@ +#include "clang/Basic/VirtualFileSystem.h" +#include "clang/Driver/Driver.h" +#include "clang/Frontend/TextDiagnosticPrinter.h" +#include "llvm/ADT/IntrusiveRefCntPtr.h" +#include "llvm/Support/ManagedStatic.h" +#include "llvm/Support/raw_ostream.h" + +using namespace clang; +using namespace clang::driver; + +int main() +{ + IntrusiveRefCntPtr DiagID(new DiagnosticIDs()); + IntrusiveRefCntPtr DiagOpts = new DiagnosticOptions(); + + DiagnosticsEngine Diags(DiagID, &*DiagOpts); + Driver TheDriver("test", "bpf-pc-linux", Diags); + + llvm::llvm_shutdown(); + return 0; +}