[cfe-dev] getting clang to find non-default libstdc++

Rafael Espíndola rafael.espindola at gmail.com
Fri Apr 27 14:14:41 PDT 2012

On 27 April 2012 15:07, Nathan Ridge <zeratul976 at hotmail.com> wrote:
> Hello,
> I am trying to use clang for the first time, on Ubuntu 10.04.
> The default compiler on Ubuntu 10.04 is GCC 4.4, but I've built
> GCC 4.7 from source and use it to compile C++11 programs.
> Clang finds GCC 4.4's libstdc++ no problem, but I need it to
> use GCC 4.7's libstdc++ because my program uses standard
> library features that have been added between GCC 4.4 and 4.7.
> How do I direct clang to find the 4.7 libstdc++?
> I saw the following instructions on the "Get Started" page:
> "If Clang cannot find your system libstdc++ headers, please
> follow these instructions:
>  - 'gcc -v -x c++ /dev/null -fsyntax-only' to get the
>    path.
>  - Look for the comment "FIXME: temporary hack:
>    hard-coded paths" in clang/lib/Frontend/InitHeaderSearch.cpp
>    and change the lines below to include that path"
> Is that the only way? Having to recompile the compiler to get
> it to find a different standard library seems a bit excessive...
> shouldn't one be able to switch standard libraries without
> recompiling the compiler?

Those comments are a bit out of date for linux.  You should be able to
configure clang with --with-gcc-toolchain pointing to where you
install g++ 4.7.

> Thanks,
> Nate


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