2N/A# getline.m4 serial 21

2N/A

2N/Adnl Copyright (C) 1998-2003, 2005-2007, 2009-2010 Free Software Foundation,

2N/Adnl Inc.

2N/Adnl

2N/Adnl This file is free software; the Free Software Foundation

2N/Adnl gives unlimited permission to copy and/or distribute it,

2N/Adnl with or without modifications, as long as this notice is preserved.

2N/A

2N/AAC_PREREQ([2.59])

2N/A

2N/Adnl See if there's a working, system-supplied version of the getline function.

2N/Adnl We can't just do AC_REPLACE_FUNCS([getline]) because some systems

2N/Adnl have a function by that name in -linet that doesn't have anything

2N/Adnl to do with the function we need.

2N/AAC_DEFUN([gl_FUNC_GETLINE],

2N/A[

2N/A AC_REQUIRE([gl_STDIO_H_DEFAULTS])

2N/A

2N/A dnl Persuade glibc <stdio.h> to declare getline().

2N/A AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])

2N/A

2N/A AC_CHECK_DECLS_ONCE([getline])

2N/A

2N/A gl_getline_needs_run_time_check=no

2N/A AC_CHECK_FUNC([getline],

2N/A [dnl Found it in some library. Verify that it works.

2N/A gl_getline_needs_run_time_check=yes],

2N/A [am_cv_func_working_getline=no])

2N/A if test $gl_getline_needs_run_time_check = yes; then

2N/A AC_CACHE_CHECK([for working getline function], [am_cv_func_working_getline],

2N/A [echo fooNbarN | tr -d '\012' | tr N '\012' > conftest.data

2N/A AC_RUN_IFELSE([AC_LANG_SOURCE([[

2N/A# include <stdio.h>

2N/A# include <stdlib.h>

2N/A# include <string.h>

2N/A int main ()

2N/A {

2N/A FILE *in = fopen ("./conftest.data", "r");

2N/A if (!in)

2N/A return 1;

2N/A {

2N/A /* Test result for a NULL buffer and a zero size.

2N/A Based on a test program from Karl Heuer. */

2N/A char *line = NULL;

2N/A size_t siz = 0;

2N/A int len = getline (&line, &siz, in);

2N/A if (!(len == 4 && line && strcmp (line, "foo\n") == 0))

2N/A return 1;

2N/A }

2N/A {

2N/A /* Test result for a NULL buffer and a non-zero size.

2N/A This crashes on FreeBSD 8.0. */

2N/A char *line = NULL;

2N/A size_t siz = (size_t)(~0) / 4;

2N/A if (getline (&line, &siz, in) == -1)

2N/A return 1;

2N/A }

2N/A return 0;

2N/A }

2N/A ]])], [am_cv_func_working_getline=yes] dnl The library version works.

2N/A , [am_cv_func_working_getline=no] dnl The library version does NOT work.

2N/A , dnl We're cross compiling. Assume it works on glibc2 systems.

2N/A [AC_EGREP_CPP([Lucky GNU user],

2N/A [

2N/A#include <features.h>

2N/A#ifdef __GNU_LIBRARY__

2N/A #if (__GLIBC__ >= 2)

2N/A Lucky GNU user

2N/A #endif

2N/A#endif

2N/A ],

2N/A [am_cv_func_working_getline=yes],

2N/A [am_cv_func_working_getline=no])]

2N/A )])

2N/A fi

2N/A

2N/A if test $ac_cv_have_decl_getline = no; then

2N/A HAVE_DECL_GETLINE=0

2N/A fi

2N/A

2N/A if test $am_cv_func_working_getline = no; then

2N/A dnl Set REPLACE_GETLINE always: Even if we have not found the broken

2N/A dnl getline function among $LIBS, it may exist in libinet and the

2N/A dnl executable may be linked with -linet.

2N/A REPLACE_GETLINE=1

2N/A AC_LIBOBJ([getline])

2N/A

2N/A gl_PREREQ_GETLINE

2N/A fi

2N/A])

2N/A

2N/A# Prerequisites of lib/getline.c.

2N/AAC_DEFUN([gl_PREREQ_GETLINE],

2N/A[

2N/A gl_FUNC_GETDELIM

2N/A])