2 Enable faster, non-thread-safe stdio functions if available,
3 globally throughout the package.
11 AC_DEFINE([GNULIB_STDIO_SINGLE_THREAD], [1],
12 [Define to 1 if you want the FILE stream functions getc, putc, etc.
13 to use unlocked I/O if available, throughout the package.
14 Unlocked I/O can improve performance, sometimes dramatically.
15 But unlocked I/O is safe only in single-threaded programs,
16 as well as in multithreaded programs for which you can guarantee that
17 every FILE stream, including stdin, stdout, stderr, is used only
20 AC_DEFINE([USE_UNLOCKED_IO], [GNULIB_STDIO_SINGLE_THREAD],
21 [An alias of GNULIB_STDIO_SINGLE_THREAD.])