9 @ref{Resizing the Data Segment,,Resizing the Data Segment,libc},
12 @url{https://www.gnu.org/software/libc/manual/html_node/Resizing-the-Data-Segment.html},
15 @uref{https://www.kernel.org/doc/man-pages/online/pages/man2/brk.2.html,,man brk}.
20 Portability problems fixed by Gnulib:
24 Portability problems not fixed by Gnulib:
27 This function is missing on some platforms:
28 AIX 5.1, Cygwin, mingw, MSVC 14.