-# getline.m4 serial 7
-dnl Copyright (C) 1998-2002 Free Software Foundation, Inc.
-dnl This file is free software, distributed under the terms of the GNU
-dnl General Public License. As a special exception to the GNU General
-dnl Public License, this file may be distributed as part of a program
-dnl that contains a configuration script generated by Autoconf, under
-dnl the same distribution terms as the rest of that program.
+# getline.m4 serial 25
-AC_PREREQ(2.52)
+dnl Copyright (C) 1998-2003, 2005-2007, 2009-2011 Free Software Foundation,
+dnl Inc.
+dnl
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_PREREQ([2.59])
dnl See if there's a working, system-supplied version of the getline function.
-dnl We can't just do AC_REPLACE_FUNCS(getline) because some systems
+dnl We can't just do AC_REPLACE_FUNCS([getline]) because some systems
dnl have a function by that name in -linet that doesn't have anything
dnl to do with the function we need.
-AC_DEFUN([AM_FUNC_GETLINE],
+AC_DEFUN([gl_FUNC_GETLINE],
[
- dnl Persuade glibc <stdio.h> to declare getline() and getdelim().
- AC_REQUIRE([AC_GNU_SOURCE])
+ AC_REQUIRE([gl_STDIO_H_DEFAULTS])
+
+ dnl Persuade glibc <stdio.h> to declare getline().
+ AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
+
+ AC_CHECK_DECLS_ONCE([getline])
- am_getline_needs_run_time_check=no
- AC_CHECK_FUNC(getline,
- dnl Found it in some library. Verify that it works.
- am_getline_needs_run_time_check=yes,
- am_cv_func_working_getline=no)
- if test $am_getline_needs_run_time_check = yes; then
- AC_CACHE_CHECK([for working getline function], am_cv_func_working_getline,
- [echo fooN |tr -d '\012'|tr N '\012' > conftest.data
- AC_TRY_RUN([
+ gl_getline_needs_run_time_check=no
+ AC_CHECK_FUNC([getline],
+ [dnl Found it in some library. Verify that it works.
+ gl_getline_needs_run_time_check=yes],
+ [am_cv_func_working_getline=no])
+ if test $gl_getline_needs_run_time_check = yes; then
+ AC_CACHE_CHECK([for working getline function], [am_cv_func_working_getline],
+ [echo fooNbarN | tr -d '\012' | tr N '\012' > conftest.data
+ AC_RUN_IFELSE([AC_LANG_SOURCE([[
# include <stdio.h>
# include <stdlib.h>
# include <string.h>
int main ()
- { /* Based on a test program from Karl Heuer. */
- char *line = NULL;
- size_t siz = 0;
- int len;
+ {
FILE *in = fopen ("./conftest.data", "r");
if (!in)
- return 1;
- len = getline (&line, &siz, in);
- exit ((len == 4 && line && strcmp (line, "foo\n") == 0) ? 0 : 1);
+ return 1;
+ {
+ /* Test result for a NULL buffer and a zero size.
+ Based on a test program from Karl Heuer. */
+ char *line = NULL;
+ size_t siz = 0;
+ int len = getline (&line, &siz, in);
+ if (!(len == 4 && line && strcmp (line, "foo\n") == 0))
+ return 2;
+ }
+ {
+ /* Test result for a NULL buffer and a non-zero size.
+ This crashes on FreeBSD 8.0. */
+ char *line = NULL;
+ size_t siz = (size_t)(~0) / 4;
+ if (getline (&line, &siz, in) == -1)
+ return 3;
+ }
+ return 0;
}
- ], am_cv_func_working_getline=yes dnl The library version works.
- , am_cv_func_working_getline=no dnl The library version does NOT work.
- , am_cv_func_working_getline=no dnl We're cross compiling.
+ ]])], [am_cv_func_working_getline=yes] dnl The library version works.
+ , [am_cv_func_working_getline=no] dnl The library version does NOT work.
+ , dnl We're cross compiling. Assume it works on glibc2 systems.
+ [AC_EGREP_CPP([Lucky GNU user],
+ [
+#include <features.h>
+#ifdef __GNU_LIBRARY__
+ #if (__GLIBC__ >= 2) && !defined __UCLIBC__
+ Lucky GNU user
+ #endif
+#endif
+ ],
+ [am_cv_func_working_getline=yes],
+ [am_cv_func_working_getline=no])]
)])
fi
+ if test $ac_cv_have_decl_getline = no; then
+ HAVE_DECL_GETLINE=0
+ fi
+
if test $am_cv_func_working_getline = no; then
- dnl We must choose a different name for our function, since on ELF systems
- dnl a broken getline() in libc.so would override our getline() in
- dnl libgettextlib.so.
- AC_DEFINE([getline], [gnu_getline],
- [Define to a replacement function name for getline().])
- AC_LIBOBJ(getline)
- gl_PREREQ_GETLINE
+ dnl Set REPLACE_GETLINE always: Even if we have not found the broken
+ dnl getline function among $LIBS, it may exist in libinet and the
+ dnl executable may be linked with -linet.
+ REPLACE_GETLINE=1
fi
])
# Prerequisites of lib/getline.c.
AC_DEFUN([gl_PREREQ_GETLINE],
[
- AC_CHECK_FUNCS(getdelim)
+ :
])