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# pipe.m4 serial 2
dnl Copyright (C) 2004, 2008 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_PIPE],
[
dnl Prerequisites of lib/pipe.h.
AC_CHECK_HEADERS_ONCE(unistd.h)
dnl Prerequisites of lib/pipe.c.
AC_REQUIRE([AC_C_INLINE])
AC_REQUIRE([AC_TYPE_MODE_T])
AC_REQUIRE([AC_FUNC_FORK])
AC_CHECK_FUNC([posix_spawn],
[gl_POSIX_SPAWN_WORKS
case "$gl_cv_func_posix_spawn_works" in
*yes)
AC_DEFINE([HAVE_POSIX_SPAWN], 1,
[Define if you have the posix_spawn() function and it works.])
;;
esac
])
])
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