[Caml-list] Error When Linking Against SDSL C++ Library

[Reuben Rowe <R.N.S.Rowe@kent.ac.uk>]

Hi,

I am trying to link some OCaml code against the SDSL C++ library, but I 
am getting a strange error.

It seems that a reference in being generated to the caml_flush() 
function, but in the standard namespace (index_interface.o is my wrapper 
to expose the library to my OCaml code):

../index_interface.o: In function `sdsl::int_vector_buffer<(unsigned 
char)8>::write_block()':
/usr/local/include/sdsl/int_vector_buffer.hpp:89: undefined reference to 
`std::ostream::caml_flush()'
../index_interface.o: In function `sdsl::int_vector_buffer<(unsigned 
char)0>::write_block()':
/usr/local/include/sdsl/int_vector_buffer.hpp:89: undefined reference to 
`std::ostream::caml_flush()'
collect2: error: ld returned 1 exit status

I am guessing this is not where it should be looking for caml_flush!?

The SDSL int_vector_buffer class on the line in question is just calling 
the flush() method on an object with a type that inherits from std::ostream.

Does anyone have an idea of why this might be happening?

Thanks,

Reuben