Resolves #1555627 - fix compilation error with latest llvm/clang

Signed-off-by: Rafael Santos <rdossant@redhat.com>

bcc.spec

@@ -7,11 +7,12 @@
 
 Name:           bcc
 Version:        0.5.0
-Release:        3%{?dist}
+Release:        4%{?dist}
 Summary:        BPF Compiler Collection (BCC)
 License:        ASL 2.0
 URL:            https://github.com/iovisor/bcc
 Source0:        %{url}/archive/v%{version}/%{name}-%{version}.tar.gz
+Patch0:         clang-api.patch
 
 # Arches will be included as upstream support is added and dependencies are
 # satisfied in the respective arches
@@ -163,6 +164,9 @@ mv %{buildroot}%{_datadir}/%{name}/examples %{buildroot}%{_docdir}/%{name}/
 
 
 %changelog
+* Thu Apr 05 2018 Rafael Santos <rdossant@redhat.com> - 0.5.0-4
+- Resolves #1555627 - fix compilation error with latest llvm/clang
+
 * Wed Feb 07 2018 Fedora Release Engineering <releng@fedoraproject.org> - 0.5.0-3
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_28_Mass_Rebuild
 

clang-api.patch

@@ -0,0 +1,71 @@
+From c0d1694e28336cbe4a57f420dd33c5e3bfaa2df9 Mon Sep 17 00:00:00 2001
+From: Yonghong Song <yhs@fb.com>
+Date: Thu, 28 Dec 2017 13:34:06 -0800
+Subject: [PATCH] fix a compilation error with latest llvm/clang trunk
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+bcc build with latest llvm/clang trunk failed with the
+below error:
+......
+[ 35%] Built target api-static
+/home/yhs/work/bcc/src/cc/frontends/clang/tp_frontend_action.cc: In member function ‘bool ebpf::TracepointTypeVisitor::Visit
+FunctionDecl(clang::FunctionDecl*)’:
+/home/yhs/work/bcc/src/cc/frontends/clang/tp_frontend_action.cc:163:60: error: no matching function for call to ‘clang::Qual
+Type::getAsString(clang::SplitQualType)’
+         auto type_name = QualType::getAsString(type.split());
+                                                            ^
+......
+
+The error is caused by the below clang commit:
+commit fcc28fd8cc8139cf1e4763459447880768579d8e
+Author: Aaron Ballman <aaron@aaronballman.com>
+Date:   Thu Dec 21 21:42:42 2017 +0000
+
+    Re-commit r321223, which adds a printing policy to the ASTDumper.
+......
+-  std::string getAsString() const {
+-    return getAsString(split());
++  static std::string getAsString(SplitQualType split,
++                                 const PrintingPolicy &Policy) {
++    return getAsString(split.Ty, split.Quals, Policy);
+   }
++  static std::string getAsString(const Type *ty, Qualifiers qs,
++                                 const PrintingPolicy &Policy);
+
+-  static std::string getAsString(SplitQualType split) {
+-    return getAsString(split.Ty, split.Quals);
+-  }
+-
+-  static std::string getAsString(const Type *ty, Qualifiers qs);
+-
++  std::string getAsString() const;
+   std::string getAsString(const PrintingPolicy &Policy) const;
+......
+
+The signature of static function getAsString(), which is used
+in src/cc/frontends/clang/tp_frontend_action.cc, got changed,
+and this caused the compilation error.
+
+The patch chooses a different way to get type_name which works
+for llvm 4.0 to 6.0 (tested).
+
+Signed-off-by: Yonghong Song <yhs@fb.com>
+---
+ src/cc/frontends/clang/tp_frontend_action.cc | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/src/cc/frontends/clang/tp_frontend_action.cc b/src/cc/frontends/clang/tp_frontend_action.cc
+index b8818baff..3b46a62a9 100644
+--- a/src/cc/frontends/clang/tp_frontend_action.cc
++++ b/src/cc/frontends/clang/tp_frontend_action.cc
+@@ -160,7 +160,7 @@ bool TracepointTypeVisitor::VisitFunctionDecl(FunctionDecl *D) {
+       auto type = arg->getType();
+       if (type->isPointerType() &&
+           type->getPointeeType()->isStructureOrClassType()) {
+-        auto type_name = QualType::getAsString(type.split());
++        auto type_name = type->getPointeeType().getAsString();
+         string tp_cat, tp_evt;
+         if (_is_tracepoint_struct_type(type_name, tp_cat, tp_evt)) {
+           string tp_struct = GenerateTracepointStruct(