I was trying to build a simple app and use the std::string to build an ofstream as allowed by C++-0X.
The source and header allows this. You can compile but not link. I've verified this on powerpc-apple-darwin7.9.0 and on x86_64-linux-unknown. I think symbols are getting stripped out of the final library. Here's a test case test_string_fstream.cpp -------------------------------------------------------------- // ./bin/bin/g++ -std=c++0x -o test_string_fstream test_string_fstream.cpp #include <string> #include <fstream> int main() { std::string name = "test.dat"; std::ofstream stream( name ); } -------------------------------------------------------------- MacOSX:~ ed$ ./bin/bin/g++ -std=c++0x -o test_string_fstream test_string_fstream.cpp /usr/bin/ld: Undefined symbols: std::basic_ofstream<char, std::char_traits<char> >::basic_ofstream(std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, std::_Ios_Openmode) Here is the compiler specifics: MacOSX:~ ed$ ./bin/bin/g++ -v Using built-in specs. Target: powerpc-apple-darwin7.9.0 Configured with: ../gcc/configure --prefix=/Users/ed/bin --with-gmp=/usr/local --with-mpfr=/usr/local --enable-languages=c,c++,fortran,objc,obj-c++ : (reconfigured) ../gcc/configure --prefix=/Users/ed/bin --with-gmp=/usr/local --with-mpfr=/usr/local --enable-languages=c,c++,fortran,objc,obj-c++ --no-create --no-recursion Thread model: posix gcc version 4.5.0 20090501 (experimental) (GCC) Thanks, Ed -- Summary: Unable to link fstream open and ctor with std::string argument. Product: gcc Version: 4.5.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: libstdc++ AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: 3dw4rd at verizon dot net http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41005