1# pipe.m4 serial 1 2dnl Copyright (C) 2004 Free Software Foundation, Inc. 3dnl This file is free software; the Free Software Foundation 4dnl gives unlimited permission to copy and/or distribute it, 5dnl with or without modifications, as long as this notice is preserved. 6 7AC_DEFUN([gl_PIPE], 8[ 9 dnl Prerequisites of lib/pipe.h. 10 AC_CHECK_HEADERS_ONCE(unistd.h) 11 dnl Prerequisites of lib/pipe.c. 12 AC_REQUIRE([AC_C_INLINE]) 13 AC_REQUIRE([AC_TYPE_MODE_T]) 14 AC_REQUIRE([AC_FUNC_FORK]) 15 AC_CHECK_FUNCS(posix_spawn) 16]) 17