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      1 # getline.m4 serial 13
      2 
      3 dnl Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2005 Free Software
      4 dnl Foundation, Inc.
      5 dnl
      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.
      9 
     10 AC_PREREQ(2.52)
     11 
     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],
     17 [
     18   AC_LIBSOURCES([getline.c, getline.h])
     19 
     20   dnl Persuade glibc <stdio.h> to declare getline().
     21   AC_REQUIRE([AC_GNU_SOURCE])
     22 
     23   AC_CHECK_DECLS([getline])
     24 
     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_TRY_RUN([
     34 #    include <stdio.h>
     35 #    include <stdlib.h>
     36 #    include <string.h>
     37     int main ()
     38     { /* Based on a test program from Karl Heuer.  */
     39       char *line = NULL;
     40       size_t siz = 0;
     41       int len;
     42       FILE *in = fopen ("./conftest.data", "r");
     43       if (!in)
     44 	return 1;
     45       len = getline (&line, &siz, in);
     46       exit ((len == 4 && line && strcmp (line, "foo\n") == 0) ? 0 : 1);
     47     }
     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     , am_cv_func_working_getline=no dnl We're cross compiling.
     51     )])
     52   fi
     53 
     54   if test $am_cv_func_working_getline = no; then
     55     dnl We must choose a different name for our function, since on ELF systems
     56     dnl a broken getline() in libc.so would override our getline() in
     57     dnl libgettextlib.so.
     58     AC_DEFINE([getline], [gnu_getline],
     59       [Define to a replacement function name for getline().])
     60     AC_LIBOBJ(getline)
     61 
     62     gl_PREREQ_GETLINE
     63   fi
     64 ])
     65 
     66 # Prerequisites of lib/getline.c.
     67 AC_DEFUN([gl_PREREQ_GETLINE],
     68 [
     69   gl_FUNC_GETDELIM
     70 ])
     71