Ошибки при сборке PvPGN 1.99 на freebsd 10 при помощи clang

[  9%] Building CXX object src/common/CMakeFiles/common.dir/bnethashconv.o
[  9%] Building CXX object src/common/CMakeFiles/common.dir/bnethash.o
[ 10%] Building CXX object src/common/CMakeFiles/common.dir/bnettime.o
[ 10%] Building CXX object src/common/CMakeFiles/common.dir/bn_type.o
[ 11%] Building CXX object src/common/CMakeFiles/common.dir/conf.o
[ 11%] Building CXX object src/common/CMakeFiles/common.dir/d2char_checksum.o
[ 12%] Building CXX object src/common/CMakeFiles/common.dir/eventlog.o
[ 12%] Building CXX object src/common/CMakeFiles/common.dir/fdwatch.o
In file included from /root/pvpgn-1.9.9/pvpgn/src/common/fdwatch.cpp:29:
In file included from /root/pvpgn-1.9.9/pvpgn/src/common/fdwatch_select.h:31:
/root/pvpgn-1.9.9/pvpgn/src/common/fdwbackend.h:36:42: error: reference to type 'const std::string' (aka 'const
      basic_string<char, char_traits<char>, allocator<char> >') could not bind to an lvalue of type 'const char [1]'
                        explicit InitError(const std::string& str = "")
                                                              ^     ~~
/root/pvpgn-1.9.9/pvpgn/src/common/fdwbackend.h:36:42: note: passing argument to parameter 'str' here
1 error generated.
*** Error code 1

namespace pvpgn
{

        class FDWBackend
        {
        public:
                class InitError :public std::runtime_error
                {
                public:
                        explicit InitError(const std::string& str = "") // !!! 36 строка
                                :std::runtime_error(str) {}
                        ~InitError() throw() {}
                };

                explicit FDWBackend(int nfds_);
                virtual ~FDWBackend() throw(); // !!! 42 строка

                virtual int add(int idx, unsigned rw) = 0;
                virtual int del(int idx) = 0;
                virtual int watch(long timeout_msecs) = 0;
                virtual void handle() = 0;

# diff ckflog_this /cmklog
1,2c1,2
< -- The C compiler identification is Clang 3.3.0
< -- The CXX compiler identification is Clang 3.3.0
---
> -- The C compiler identification is GNU 4.2.1
> -- The CXX compiler identification is GNU 4.2.1
36c36
< -- Looking for C++ include sys/timeb.h - found
---
> -- Looking for C++ include sys/timeb.h - not found
243c243
< -- Build files have been written to: /root/pvpgn-1.9.9/pvpgn-199.r577
---
> -- Build files have been written to: /root/pvpgn/pvpgn-199.r577