3 dnl Copyright (C) 1998-2003, 2005-2007, 2009-2010 Free Software Foundation,
6 dnl This file is free software; the Free Software Foundation
7 dnl gives unlimited permission to copy and/or distribute it,
8 dnl with or without modifications, as long as this notice is preserved.
12 dnl See if there's a working, system-supplied version of the getline function.
13 dnl We can't just do AC_REPLACE_FUNCS([getline]) because some systems
14 dnl have a function by that name in -linet that doesn't have anything
15 dnl to do with the function we need.
16 AC_DEFUN([gl_FUNC_GETLINE],
18 AC_REQUIRE([gl_STDIO_H_DEFAULTS])
20 dnl Persuade glibc <stdio.h> to declare getline().
21 AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
23 AC_CHECK_DECLS_ONCE([getline])
25 gl_getline_needs_run_time_check=no
26 AC_CHECK_FUNC([getline],
27 dnl Found it in some library. Verify that it works.
28 gl_getline_needs_run_time_check=yes,
29 am_cv_func_working_getline=no)
30 if test $gl_getline_needs_run_time_check = yes; then
31 AC_CACHE_CHECK([for working getline function], [am_cv_func_working_getline],
32 [echo fooN |tr -d '\012'|tr N '\012' > conftest.data
33 AC_RUN_IFELSE([AC_LANG_SOURCE([[
38 { /* Based on a test program from Karl Heuer. */
42 FILE *in = fopen ("./conftest.data", "r");
45 len = getline (&line, &siz, in);
46 exit ((len == 4 && line && strcmp (line, "foo\n") == 0) ? 0 : 1);
48 ]])], [am_cv_func_working_getline=yes] dnl The library version works.
49 , [am_cv_func_working_getline=no] dnl The library version does NOT work.
50 , dnl We're cross compiling. Assume it works on glibc2 systems.
51 [AC_EGREP_CPP([Lucky GNU user],
54 #ifdef __GNU_LIBRARY__
60 [am_cv_func_working_getline=yes],
61 [am_cv_func_working_getline=no])]
65 if test $ac_cv_have_decl_getline = no; then
69 if test $am_cv_func_working_getline = no; then
77 # Prerequisites of lib/getline.c.
78 AC_DEFUN([gl_PREREQ_GETLINE],