Comment 26 for bug 1831385

The master branch has been updated by Jonathan Wakely <email address hidden>:

https://gcc.gnu.org/g:0b880466e910b4f1be2ea2d0d9cb9407d24ca299

commit r14-5341-g0b880466e910b4f1be2ea2d0d9cb9407d24ca299
Author: Nathaniel Shead <email address hidden>
Date: Thu May 11 23:02:18 2023 +0100

    libstdc++: Add missing functions to <cmath> [PR79700]

    This patch adds the -f and -l variants of the C99 <math.h> functions to
    <cmath> under namespace std (so std::sqrtf, std::fabsl, etc.) for C++11
    and up.

    libstdc++-v3/ChangeLog:

            PR libstdc++/79700
            * include/c_global/cmath (acosf, acosl, asinf, asinl, atanf)
            (atanl, atan2f, atan2l, ceilf, ceill, cosf, cosl, coshf, coshl)
            (expf, expl, fabsf, fabsl, floorf, floorl, fmodf, fmodl, frexpf)
            (frexpl, ldexpf, ldexpl, logf, logl, log10f, log10l, modff)
            (modfl, powf, powl, sinf, sinl, sinhf, sinhl, sqrtf, sqrtl, tanf)
            (tanl, tanhf, tanhl): Add using-declarations in namespace std.
            * testsuite/26_numerics/headers/cmath/equivalent_functions.cc:
            New test.
            * testsuite/26_numerics/headers/cmath/functions_std_c++17.cc:
            Add checks for existence of above names.

    Signed-off-by: Nathaniel Shead <email address hidden>
    Reviewed-by: Jonathan Wakely <email address hidden>