--- /dev/null
+# posix_openpt.m4 serial 2
+dnl Copyright (C) 2011-2014 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.
+
+AC_DEFUN([gl_FUNC_POSIX_OPENPT],
+[
+ AC_REQUIRE([gl_STDLIB_H_DEFAULTS])
+
+ dnl Persuade Solaris <stdlib.h> to declare posix_openpt().
+ AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
+
+ AC_CHECK_FUNCS_ONCE([posix_openpt])
+ if test $ac_cv_func_posix_openpt != yes; then
+ dnl The system does not have posix_openpt.
+ HAVE_POSIX_OPENPT=0
+ fi
+])