posix_openpt: new module

[gnulib.git] / m4 / posix_openpt.m4

diff --git a/m4/posix_openpt.m4 b/m4/posix_openpt.m4
new file mode 100644 (file)
index 0000000..8d90f9b
--- /dev/null
+++ b/m4/posix_openpt.m4
@@ -0,0 +1,21 @@
+# posix_openpt.m4 serial 1
+dnl Copyright (C) 2011 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_have_posix_openpt != yes; then
+    dnl The system does not have posix_openpt.
+    HAVE_POSIX_OPENPT=0
+    dnl Prerequisites of lib/posix_openpt.c in this case.
+    AC_CHECK_FUNCS([_getpty])
+  fi
+])