[lldb-dev] compiler error with building lldb from scratch

Abid, Hafiz Hafiz_Abid at mentor.com
Fri Feb 8 09:17:54 PST 2013

This seems to be caused by the following commit.

r174576 | rsmith | 2013-02-07 03:30:24 +0000 (Thu, 07 Feb 2013) | 9 lines

Simplify FindExternalVisibleDeclsByName by making it return a bool indicating
if it found any decls, rather than returning a list of found decls. This
removes a returning-ArrayRef-to-deleted-storage bug from
MultiplexExternalSemaSource (in code not exercised by any of the clang
binaries), reduces the work required in the found-no-decls case with PCH, and
importantly removes the need for DeclContext::lookup to be reentrant.

From: lldb-dev-bounces at cs.uiuc.edu [lldb-dev-bounces at cs.uiuc.edu] on behalf of Dmitry Markman [dmarkman at mac.com]
Sent: Friday, February 08, 2013 2:07 PM
To: lldb-dev at cs.uiuc.edu
Subject: [lldb-dev] compiler error with building lldb from scratch

I just checked out lldb sources, open Xcode workspace
in attempt to build lldb-tool target

I got few errors like
virtual function 'FindExternalVisibleDeclsByName' has a different return type ('clang::DeclContextLookupResult' (aka 'MutableArrayRef<clang::NamedDecl *>')) than the function it overrides (which has return type 'bool')
    FindExternalVisibleDeclsByName (const clang::DeclContext *DC,

and indeed file
lldb/llvm/tools/clang/include/clang/AST/ExternalASTSource.h has the following declaration
  virtual bool
  FindExternalVisibleDeclsByName(const DeclContext *DC, DeclarationName Name);

but my llvm sources (173760)
has the following declaration

  virtual DeclContextLookupResult
  FindExternalVisibleDeclsByName(const DeclContext *DC, DeclarationName Name);

if I replace lldb/llvm folder with llvm folder (173760)

I got another error:
lldb/source/DataFormatters/CXXFormatterFunctions.cpp:14:10: fatal error: 'llvm/Support/ConvertUTF.h' file not found

that file does exist in the latest llvm repository
so if I copy that file to the lldb/llvm/include/llvm/Support folder

then build was ok


Dmitry Markman

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