linker error

[rwst]

This:

g++ -std=c++11 -o flint flint.cpp -lflint

with flint.cpp:

#include <flint/fmpq_poly.h>
#include <benchpress/benchpress.hpp>
#include "series-benchmark.h"

int main()
{
    fmpq_poly_t x, y, z;
    fmpq_poly_init (x);
    fmpq_poly_init (y);
    fmpq_poly_init (z);

    fmpq_poly_set_coeff_ui(x, 1, 1);
    fmpq_poly_sin_series(x, x, N);
    fmpq_poly_set_coeff_ui(y, 1, 1);
    fmpq_poly_cos_series(y, y, N);

    BENCHMARK("flint", [&](benchpress::context* ctx) {
        for (size_t i = 0; i < ctx->num_iterations(); ++i) {
            fmpq_poly_mullow (z , x , y, N) ;
        }
    })
    fmpq_poly_clear (x);
    fmpq_poly_clear (y);
    fmpq_poly_clear (z);

    return 0;
}

produces

/tmp/ccSDe92z.o: In function `benchpress::registration::get_ptr()':
flint.cpp:(.text._ZN10benchpress12registration7get_ptrEv[_ZN10benchpress12registration7get_ptrEv]+0xa): undefined reference to `benchpress::registration::d_this'
flint.cpp:(.text._ZN10benchpress12registration7get_ptrEv[_ZN10benchpress12registration7get_ptrEv]+0x42): undefined reference to `benchpress::registration::d_this'
flint.cpp:(.text._ZN10benchpress12registration7get_ptrEv[_ZN10benchpress12registration7get_ptrEv]+0x49): undefined reference to `benchpress::registration::d_this'
collect2: error: ld returned 1 exit status

Please Help!

[rwst]

Okay, this error is resolved by adding this line to my source cpp:

benchpress::registration* benchpress::registration::d_this;

This ticket should add something about it to the readme.

[rwst]

No actually I needed gcc-4.9. 4.8 will not suffice for benchpress!

[cjgdev]

@rwst I would be willing to accept a pull request with the documentation update if you are offering to submit one.