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List:       cfe-dev
Subject:    Re: [cfe-dev] Building clang on Mavericks with libc++....
From:       Fons Rademakers <Fons.Rademakers () cern ! ch>
Date:       2013-11-09 20:43:19
Message-ID: 187275EE-00B7-48B8-84FF-FA3506C74CED () cern ! ch
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Hi Rafael,

   Could you elaborate a bit more on how to get the libc++ headers copied during \
clang's make install? I don't see that happening now. 

Cheers, Fons.

> On 9 Nov 2013, at 21:02, Rafael EspĂ­ndola <rafael.espindola@gmail.com> wrote:
> 
> It looks like the headers are only copied during make install, so you
> have to install clang to be able to use the libcxx headers.
> 
> > On 9 November 2013 11:02, Fons Rademakers <Fons.Rademakers@cern.ch> wrote:
> > Hi Jean-Daniel,
> > 
> > thanks for the reply. However, it seems putting the libcxx
> > <llvmsource>/projects/ does not work, as shown in config.log:
> > 
> > configure:3639: WARNING: Unknown project (libcxx) won't be configured
> > automatically
> > configure:3680: checking build system type
> > 
> > and even in projects/Makefile it says:
> > 
> > # Don't build libcxx, it isn't designed to be built directly.
> > DIRS := $(filter-out libcxx,$(DIRS))
> > 
> > so what is the best approach to inject:
> > 
> > /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/c++/v1/
> >  
> > as search directory to self compiled clang?
> > 
> > 
> > Cheers, Fons.
> > 
> > 
> > 
> > > On 09/11/2013 10:20, Jean-Daniel Dupas wrote:
> > > 
> > > Le 9 nov. 2013 Ă  01:00, Fons Rademakers <Fons.Rademakers@cern.ch> a Ă©crit
> > > > 
> > > 
> > > > Hi,
> > > > 
> > > > when compiling clang (todays trunk) from source on Mavericks, which ships
> > > > with libc++ in:
> > > > 
> > > > 
> > > > /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/c++/v1/
> > > >  
> > > > and for LLVM configured like this:
> > > > 
> > > > $ /Users/rdm/root/interpreter/llvm/src/configure
> > > > --prefix=/Users/rdm/root/interpreter/llvm/inst --disable-docs
> > > > --disable-bindings --disable-visibility-inlines-hidden --enable-libcpp
> > > > --disable-optimized --enable-targets=host --with-extra-options= CC=clang
> > > > CXX=clang++ CFLAGS=-m64 CXXFLAGS=-m64
> > > > 
> > > > but that does not seem to be enough as the built clang++ does look for
> > > > libc++ in:
> > > > 
> > > > …
> > > > so what config option should I specify to get clang++ to use the one and
> > > > only copy of libc++, namely the one in:
> > > > 
> > > > 
> > > > /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/c++/v1/
> > > >  
> > > > Should configure not take the libc++ location from the specified CXX
> > > > compiler? Which indeed is:
> > > > 
> > > > …
> > > > 
> > > > Any suggestions welcome.
> > > > 
> > > > 
> > > > Cheers, Fons.
> > > 
> > > 
> > > Since Xcode 5 (or Maverick, I'm not sure), libc++ headers are no longer
> > > part of the system, but part of the toolchain.
> > > 
> > > So Maverick does not ships with C++ header, clang in Xcode does (and it
> > > know where to look for its own libc++ headers). If you are using your own
> > > clang build, you have to provide libc++ headers yourself.
> > > 
> > > Actually, this is easy as it is done automatically by the build system if
> > > libcxx is checked out in <llvm source>/projects/
> > > 
> > > For the record, libcxx can be checked out using :
> > > 
> > > svn co http://llvm.org/svn/llvm-project/libcxx/trunk libcxx
> > > 
> > > -- Jean-Daniel
> > 
> > --
> > Org:    CERN, European Laboratory for Particle Physics.
> > Mail:   1211 Geneve 23, Switzerland
> > E-Mail: Fons.Rademakers@cern.ch              Phone: +41 22 7679248
> > WWW:    http://fons.rademakers.org           Fax:   +41 22 7669640
> > 
> > 
> > _______________________________________________
> > cfe-dev mailing list
> > cfe-dev@cs.uiuc.edu
> > http://lists.cs.uiuc.edu/mailman/listinfo/cfe-dev
> > 


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