3 dnl Copyright (C) 1998-2003, 2005-2007, 2009 Free Software Foundation, Inc.
5 dnl This file is free software; the Free Software Foundation
6 dnl gives unlimited permission to copy and/or distribute it,
7 dnl with or without modifications, as long as this notice is preserved.
11 dnl See if there's a working, system-supplied version of the getline function.
12 dnl We can't just do AC_REPLACE_FUNCS([getline]) because some systems
13 dnl have a function by that name in -linet that doesn't have anything
14 dnl to do with the function we need.
15 AC_DEFUN([gl_FUNC_GETLINE],
17 AC_REQUIRE([gl_STDIO_H_DEFAULTS])
19 dnl Persuade glibc <stdio.h> to declare getline().
20 AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
22 AC_CHECK_DECLS_ONCE([getline])
24 gl_getline_needs_run_time_check=no
25 AC_CHECK_FUNC([getline],
26 dnl Found it in some library. Verify that it works.
27 gl_getline_needs_run_time_check=yes,
28 am_cv_func_working_getline=no)
29 if test $gl_getline_needs_run_time_check = yes; then
30 AC_CACHE_CHECK([for working getline function], [am_cv_func_working_getline],
31 [echo fooN |tr -d '\012'|tr N '\012' > conftest.data
37 { /* Based on a test program from Karl Heuer. */
41 FILE *in = fopen ("./conftest.data", "r");
44 len = getline (&line, &siz, in);
45 exit ((len == 4 && line && strcmp (line, "foo\n") == 0) ? 0 : 1);
47 ], am_cv_func_working_getline=yes dnl The library version works.
48 , am_cv_func_working_getline=no dnl The library version does NOT work.
49 , dnl We're cross compiling. Assume it works on glibc2 systems.
50 [AC_EGREP_CPP([Lucky GNU user],
53 #ifdef __GNU_LIBRARY__
59 [am_cv_func_working_getline=yes],
60 [am_cv_func_working_getline=no])]
64 if test $ac_cv_have_decl_getline = no; then
68 if test $am_cv_func_working_getline = no; then
76 # Prerequisites of lib/getline.c.
77 AC_DEFUN([gl_PREREQ_GETLINE],