From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1035001AbcIZH2O (ORCPT ); Mon, 26 Sep 2016 03:28:14 -0400 Received: from szxga02-in.huawei.com ([119.145.14.65]:15784 "EHLO szxga02-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1034669AbcIZH2J (ORCPT ); Mon, 26 Sep 2016 03:28:09 -0400 From: Wang Nan To: , CC: , , , Wang Nan , Arnaldo Carvalho de Melo , Alexei Starovoitov , He Kuang , Jiri Olsa Subject: [PATCH v2 04/18] perf tools: Add feature detection for clang Date: Mon, 26 Sep 2016 07:26:58 +0000 Message-ID: <1474874832-134786-5-git-send-email-wangnan0@huawei.com> X-Mailer: git-send-email 1.8.3.4 In-Reply-To: <1474874832-134786-1-git-send-email-wangnan0@huawei.com> References: <1474874832-134786-1-git-send-email-wangnan0@huawei.com> MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.107.193.248] X-CFilter-Loop: Reflected X-Mirapoint-Virus-RAPID-Raw: score=unknown(0), refid=str=0001.0A020201.57E8CDF3.00CB,ss=1,re=0.000,recu=0.000,reip=0.000,cl=1,cld=1,fgs=0, ip=0.0.0.0, so=2013-06-18 04:22:30, dmn=2013-03-21 17:37:32 X-Mirapoint-Loop-Id: 33aef16aa0c2db357296b5ee796f06da Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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: Arnaldo Carvalho de Melo Cc: Alexei Starovoitov Cc: He Kuang Cc: Jiri Olsa --- 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 diff --git a/tools/build/feature/Makefile b/tools/build/feature/Makefile index fd2f3e2..0af90dd 100644 --- a/tools/build/feature/Makefile +++ b/tools/build/feature/Makefile @@ -233,6 +233,16 @@ $(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 0000000..e23c1b1 --- /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; +} -- 1.8.3.4