| # pipe2.m4 | |
| # serial 4 | |
| dnl Copyright (C) 2009-2026 Free Software Foundation, Inc. | |
| dnl This file is free software; the Free Software Foundation | |
| dnl gives unlimited permission to copy and/or distribute it, | |
| dnl with or without modifications, as long as this notice is preserved. | |
| dnl This file is offered as-is, without any warranty. | |
| AC_DEFUN([gl_FUNC_PIPE2], | |
| [ | |
| AC_REQUIRE([gl_UNISTD_H_DEFAULTS]) | |
| dnl Persuade glibc <unistd.h> to declare pipe2(). | |
| AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS]) | |
| gl_CHECK_FUNCS_ANDROID([pipe2], [[#include <unistd.h>]]) | |
| if test $ac_cv_func_pipe2 != yes; then | |
| HAVE_PIPE2=0 | |
| case "$gl_cv_onwards_func_pipe2" in | |
| future*) REPLACE_PIPE2=1 ;; | |
| esac | |
| else | |
| REPLACE_PIPE2=1 | |
| fi | |
| ]) |