[CLN-list] Compile cln linked against libc++

[Stefan Schupp]

Hi,

I am currently trying to compile cln with linkage against libc++. My
aproach was:

/configure CXX=/usr/bin/clang++ CXXFLAGS=-stdlib=libc++

However this does not work as I get erroneus output such as

In file included from base/cl_alloca.cc:4:
In file included from ./base/cl_sysdep.h:56:
In file included from ./base/cl_macros.h:7:
../include/cln/exception.h:14:24: error: implicit instantiation of
undefined template 'std::__1::basic_string<char,
std::__1::char_traits<char>, std::__1::allocator<char> >'
                : std::runtime_error(std::string()) {}
                                     ^
/usr/bin/../lib/c++/v1/iosfwd:187:28: note: template is declared here
    class _LIBCPP_TYPE_VIS basic_string;

What does this mean and what am I doing wrong? I need this in order to
compile ginac with the same linkage as it is used in a project with c++11
features.

Best regards,
Stefan
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