| 1 | # pipe2.m4 serial 2 |
| 2 | dnl Copyright (C) 2009-2013 Free Software Foundation, Inc. |
| 3 | dnl This file is free software; the Free Software Foundation |
| 4 | dnl gives unlimited permission to copy and/or distribute it, |
| 5 | dnl with or without modifications, as long as this notice is preserved. |
| 6 | |
| 7 | AC_DEFUN([gl_FUNC_PIPE2], |
| 8 | [ |
| 9 | AC_REQUIRE([gl_UNISTD_H_DEFAULTS]) |
| 10 | |
| 11 | dnl Persuade glibc <unistd.h> to declare pipe2(). |
| 12 | AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS]) |
| 13 | |
| 14 | AC_CHECK_FUNCS_ONCE([pipe2]) |
| 15 | if test $ac_cv_func_pipe2 != yes; then |
| 16 | HAVE_PIPE2=0 |
| 17 | fi |
| 18 | ]) |